/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/Problem15_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:13,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:13,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:13,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:53:13,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:53:13,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:53:13,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:53:13,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:53:13,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:53:13,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:53:13,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:53:13,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:53:13,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:53:13,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:53:13,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:53:13,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:53:13,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:53:13,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:13,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:13,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:13,834 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 22:53:13,847 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:13,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:13,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:13,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:13,849 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:13,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:13,849 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:13,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:13,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:13,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:13,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:13,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:13,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:13,850 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:13,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:13,851 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:13,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:13,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:13,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:13,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:13,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:13,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:13,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:13,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:13,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:13,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:13,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:13,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:13,853 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 22:53:14,161 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:14,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:14,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:14,188 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:14,188 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:14,189 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-11-06 22:53:14,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a270f5c/143331004b3e48798c0943db82f60eb6/FLAG57a88e97c [2019-11-06 22:53:14,937 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:14,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-11-06 22:53:14,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a270f5c/143331004b3e48798c0943db82f60eb6/FLAG57a88e97c [2019-11-06 22:53:15,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a270f5c/143331004b3e48798c0943db82f60eb6 [2019-11-06 22:53:15,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:15,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:15,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:15,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:15,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:15,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@259328c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15, skipping insertion in model container [2019-11-06 22:53:15,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,127 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:15,220 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:16,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:16,138 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:16,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:16,434 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:16,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16 WrapperNode [2019-11-06 22:53:16,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:16,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:16,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:16,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:16,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (1/1) ... [2019-11-06 22:53:16,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (1/1) ... [2019-11-06 22:53:16,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (1/1) ... [2019-11-06 22:53:16,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (1/1) ... [2019-11-06 22:53:16,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (1/1) ... [2019-11-06 22:53:16,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (1/1) ... [2019-11-06 22:53:16,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (1/1) ... [2019-11-06 22:53:16,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:16,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:16,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:16,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:16,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (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 22:53:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:20,633 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:20,633 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:20,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:20 BoogieIcfgContainer [2019-11-06 22:53:20,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:20,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:20,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:20,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:20,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:15" (1/3) ... [2019-11-06 22:53:20,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f743ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:20, skipping insertion in model container [2019-11-06 22:53:20,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:16" (2/3) ... [2019-11-06 22:53:20,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f743ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:20, skipping insertion in model container [2019-11-06 22:53:20,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:20" (3/3) ... [2019-11-06 22:53:20,643 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label43.c [2019-11-06 22:53:20,653 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:20,662 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:20,674 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:20,713 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:20,713 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:20,713 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:20,713 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:20,713 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:20,714 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:20,714 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:20,714 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:53:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 22:53:20,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:20,756 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] [2019-11-06 22:53:20,758 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:20,764 INFO L82 PathProgramCache]: Analyzing trace with hash 402824616, now seen corresponding path program 1 times [2019-11-06 22:53:20,773 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:20,773 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61578513] [2019-11-06 22:53:20,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:21,122 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 22:53:21,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61578513] [2019-11-06 22:53:21,123 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:21,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:21,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662672548] [2019-11-06 22:53:21,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:21,131 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:21,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:21,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:21,148 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:53:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:25,667 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-11-06 22:53:25,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:25,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-11-06 22:53:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:25,696 INFO L225 Difference]: With dead ends: 1554 [2019-11-06 22:53:25,697 INFO L226 Difference]: Without dead ends: 1036 [2019-11-06 22:53:25,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 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 22:53:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-11-06 22:53:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-11-06 22:53:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-06 22:53:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-11-06 22:53:25,818 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 64 [2019-11-06 22:53:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:25,819 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-11-06 22:53:25,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-11-06 22:53:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 22:53:25,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:25,829 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:25,829 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1979650764, now seen corresponding path program 1 times [2019-11-06 22:53:25,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:25,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228296066] [2019-11-06 22:53:25,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:26,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228296066] [2019-11-06 22:53:26,076 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:26,077 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:26,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830666263] [2019-11-06 22:53:26,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:26,079 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:26,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:26,080 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-11-06 22:53:29,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:29,485 INFO L93 Difference]: Finished difference Result 2632 states and 4594 transitions. [2019-11-06 22:53:29,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:29,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-11-06 22:53:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:29,498 INFO L225 Difference]: With dead ends: 2632 [2019-11-06 22:53:29,499 INFO L226 Difference]: Without dead ends: 1941 [2019-11-06 22:53:29,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:53:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2019-11-06 22:53:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1936. [2019-11-06 22:53:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2019-11-06 22:53:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2971 transitions. [2019-11-06 22:53:29,602 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2971 transitions. Word has length 133 [2019-11-06 22:53:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:29,603 INFO L462 AbstractCegarLoop]: Abstraction has 1936 states and 2971 transitions. [2019-11-06 22:53:29,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2971 transitions. [2019-11-06 22:53:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-06 22:53:29,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:29,617 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, 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] [2019-11-06 22:53:29,618 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1305643434, now seen corresponding path program 1 times [2019-11-06 22:53:29,618 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:29,619 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966487992] [2019-11-06 22:53:29,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:29,909 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966487992] [2019-11-06 22:53:29,910 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:29,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:53:29,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133687156] [2019-11-06 22:53:29,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:29,914 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:29,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:29,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:53:29,915 INFO L87 Difference]: Start difference. First operand 1936 states and 2971 transitions. Second operand 5 states. [2019-11-06 22:53:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:38,042 INFO L93 Difference]: Finished difference Result 5496 states and 8518 transitions. [2019-11-06 22:53:38,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:53:38,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-11-06 22:53:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:38,070 INFO L225 Difference]: With dead ends: 5496 [2019-11-06 22:53:38,070 INFO L226 Difference]: Without dead ends: 3566 [2019-11-06 22:53:38,077 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 22:53:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2019-11-06 22:53:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3546. [2019-11-06 22:53:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2019-11-06 22:53:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5185 transitions. [2019-11-06 22:53:38,245 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5185 transitions. Word has length 214 [2019-11-06 22:53:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:38,247 INFO L462 AbstractCegarLoop]: Abstraction has 3546 states and 5185 transitions. [2019-11-06 22:53:38,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5185 transitions. [2019-11-06 22:53:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-06 22:53:38,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:38,257 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:38,257 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash 40242713, now seen corresponding path program 1 times [2019-11-06 22:53:38,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:38,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298625320] [2019-11-06 22:53:38,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 114 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:53:38,645 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298625320] [2019-11-06 22:53:38,645 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977743146] [2019-11-06 22:53:38,645 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 22:53:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:38,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:53:38,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 22:53:38,995 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 114 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:53:39,179 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:39,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:53:39,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496298821] [2019-11-06 22:53:39,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:39,180 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:39,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:39,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:53:39,181 INFO L87 Difference]: Start difference. First operand 3546 states and 5185 transitions. Second operand 5 states. [2019-11-06 22:53:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:42,888 INFO L93 Difference]: Finished difference Result 10012 states and 15157 transitions. [2019-11-06 22:53:42,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:53:42,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 237 [2019-11-06 22:53:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:42,924 INFO L225 Difference]: With dead ends: 10012 [2019-11-06 22:53:42,924 INFO L226 Difference]: Without dead ends: 6472 [2019-11-06 22:53:42,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 470 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:53:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2019-11-06 22:53:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 5183. [2019-11-06 22:53:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5183 states. [2019-11-06 22:53:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 7218 transitions. [2019-11-06 22:53:43,107 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 7218 transitions. Word has length 237 [2019-11-06 22:53:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:43,107 INFO L462 AbstractCegarLoop]: Abstraction has 5183 states and 7218 transitions. [2019-11-06 22:53:43,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 7218 transitions. [2019-11-06 22:53:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-11-06 22:53:43,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:43,118 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:43,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:43,324 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1475726661, now seen corresponding path program 1 times [2019-11-06 22:53:43,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:43,327 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398255635] [2019-11-06 22:53:43,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:53:43,782 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398255635] [2019-11-06 22:53:43,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097061388] [2019-11-06 22:53:43,783 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 22:53:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:43,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:53:43,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:53:44,253 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:53:44,712 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:44,712 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-11-06 22:53:44,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821488320] [2019-11-06 22:53:44,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:44,714 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:44,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:44,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:53:44,715 INFO L87 Difference]: Start difference. First operand 5183 states and 7218 transitions. Second operand 4 states. [2019-11-06 22:53:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:48,149 INFO L93 Difference]: Finished difference Result 12545 states and 17576 transitions. [2019-11-06 22:53:48,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:48,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2019-11-06 22:53:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:48,186 INFO L225 Difference]: With dead ends: 12545 [2019-11-06 22:53:48,187 INFO L226 Difference]: Without dead ends: 7368 [2019-11-06 22:53:48,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:53:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7368 states. [2019-11-06 22:53:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7368 to 5819. [2019-11-06 22:53:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5819 states. [2019-11-06 22:53:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 8010 transitions. [2019-11-06 22:53:48,361 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 8010 transitions. Word has length 338 [2019-11-06 22:53:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:48,363 INFO L462 AbstractCegarLoop]: Abstraction has 5819 states and 8010 transitions. [2019-11-06 22:53:48,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 8010 transitions. [2019-11-06 22:53:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-06 22:53:48,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:48,373 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, 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, 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, 1, 1, 1, 1] [2019-11-06 22:53:48,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:48,577 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash 697115230, now seen corresponding path program 1 times [2019-11-06 22:53:48,578 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:48,578 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972696463] [2019-11-06 22:53:48,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 236 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:49,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972696463] [2019-11-06 22:53:49,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424132652] [2019-11-06 22:53:49,035 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 22:53:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:49,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:53:49,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 22:53:49,263 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 22:53:49,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:53:49,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-11-06 22:53:49,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885356333] [2019-11-06 22:53:49,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:49,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:49,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:49,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:53:49,433 INFO L87 Difference]: Start difference. First operand 5819 states and 8010 transitions. Second operand 4 states.