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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:20,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:20,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:20,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:20,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:20,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:20,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:20,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:20,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:20,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:20,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:20,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:20,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:20,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:20,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:20,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:20,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:20,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:20,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:20,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:20,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:20,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:20,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:20,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:20,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:20,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:20,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:20,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:20,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:20,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:20,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:20,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:20,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:20,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:20,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:20,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:20,870 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 [2019-10-13 18:05:20,903 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:20,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:20,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:20,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:20,905 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:20,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:20,907 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:20,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:20,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:20,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:20,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:20,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:20,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:20,908 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:20,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:20,909 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:20,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:20,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:20,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:20,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:20,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:20,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:20,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:20,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:20,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:20,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:20,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:20,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:20,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:21,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:21,230 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:21,234 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:21,236 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:21,236 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:21,237 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-10-13 18:05:21,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e8d0cb8/c9ec2aa20e864b6ebd2d10b6e4089e22/FLAGeb8320617 [2019-10-13 18:05:21,998 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:21,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-10-13 18:05:22,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e8d0cb8/c9ec2aa20e864b6ebd2d10b6e4089e22/FLAGeb8320617 [2019-10-13 18:05:22,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e8d0cb8/c9ec2aa20e864b6ebd2d10b6e4089e22 [2019-10-13 18:05:22,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:22,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:22,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:22,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:22,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:22,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:22" (1/1) ... [2019-10-13 18:05:22,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a64cdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:22, skipping insertion in model container [2019-10-13 18:05:22,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:22" (1/1) ... [2019-10-13 18:05:22,216 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:22,302 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:23,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:23,169 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:23,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:23,546 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:23,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23 WrapperNode [2019-10-13 18:05:23,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:23,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:23,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:23,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:23,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:23,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:23,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:23,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:23,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (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 [2019-10-13 18:05:23,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:23,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:23,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:23,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:23,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:26,208 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:26,209 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:26,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:26 BoogieIcfgContainer [2019-10-13 18:05:26,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:26,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:26,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:26,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:26,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:22" (1/3) ... [2019-10-13 18:05:26,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d5d673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:26, skipping insertion in model container [2019-10-13 18:05:26,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (2/3) ... [2019-10-13 18:05:26,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d5d673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:26, skipping insertion in model container [2019-10-13 18:05:26,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:26" (3/3) ... [2019-10-13 18:05:26,229 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label24.c [2019-10-13 18:05:26,239 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:26,251 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:26,263 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:26,312 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:26,313 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:26,313 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:26,313 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:26,313 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:26,313 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:26,313 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:26,314 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 18:05:26,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:26,364 INFO L380 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] [2019-10-13 18:05:26,366 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash 272014893, now seen corresponding path program 1 times [2019-10-13 18:05:26,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:26,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157146842] [2019-10-13 18:05:26,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:26,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157146842] [2019-10-13 18:05:26,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:26,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:26,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752986355] [2019-10-13 18:05:26,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:26,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:26,763 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:31,995 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:05:31,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:31,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-10-13 18:05:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:32,024 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:32,025 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:32,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-13 18:05:32,173 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 58 [2019-10-13 18:05:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:32,174 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-13 18:05:32,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-13 18:05:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-13 18:05:32,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:32,190 INFO L380 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, 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] [2019-10-13 18:05:32,190 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash 190582509, now seen corresponding path program 1 times [2019-10-13 18:05:32,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:32,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529630549] [2019-10-13 18:05:32,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:32,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:32,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 102 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:32,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529630549] [2019-10-13 18:05:32,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900087497] [2019-10-13 18:05:32,857 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 [2019-10-13 18:05:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:32,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-13 18:05:33,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:33,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:05:33,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997830697] [2019-10-13 18:05:33,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:33,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:33,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:33,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:33,145 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-13 18:05:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:37,058 INFO L93 Difference]: Finished difference Result 3131 states and 5064 transitions. [2019-10-13 18:05:37,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:37,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-13 18:05:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:37,081 INFO L225 Difference]: With dead ends: 3131 [2019-10-13 18:05:37,082 INFO L226 Difference]: Without dead ends: 2106 [2019-10-13 18:05:37,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-13 18:05:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2083. [2019-10-13 18:05:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-13 18:05:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3188 transitions. [2019-10-13 18:05:37,175 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3188 transitions. Word has length 240 [2019-10-13 18:05:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:37,178 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3188 transitions. [2019-10-13 18:05:37,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3188 transitions. [2019-10-13 18:05:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-10-13 18:05:37,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:37,191 INFO L380 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, 2, 2, 2, 2, 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] [2019-10-13 18:05:37,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:37,399 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1651699548, now seen corresponding path program 1 times [2019-10-13 18:05:37,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:37,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089189356] [2019-10-13 18:05:37,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:37,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:37,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 102 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:37,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089189356] [2019-10-13 18:05:37,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871228079] [2019-10-13 18:05:37,821 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 [2019-10-13 18:05:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:37,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-13 18:05:38,056 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:38,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:38,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956597067] [2019-10-13 18:05:38,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:38,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:38,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:38,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:38,060 INFO L87 Difference]: Start difference. First operand 2083 states and 3188 transitions. Second operand 5 states. [2019-10-13 18:05:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:40,813 INFO L93 Difference]: Finished difference Result 6311 states and 9957 transitions. [2019-10-13 18:05:40,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:40,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2019-10-13 18:05:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:40,845 INFO L225 Difference]: With dead ends: 6311 [2019-10-13 18:05:40,845 INFO L226 Difference]: Without dead ends: 4234 [2019-10-13 18:05:40,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-13 18:05:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-13 18:05:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-13 18:05:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-10-13 18:05:40,970 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 247 [2019-10-13 18:05:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:40,970 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-10-13 18:05:40,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-10-13 18:05:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-13 18:05:40,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:40,977 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:41,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:41,180 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash 816359692, now seen corresponding path program 1 times [2019-10-13 18:05:41,181 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:41,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452628046] [2019-10-13 18:05:41,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:41,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:41,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:41,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452628046] [2019-10-13 18:05:41,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692817772] [2019-10-13 18:05:41,596 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 [2019-10-13 18:05:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:41,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:41,804 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:41,804 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:41,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865496930] [2019-10-13 18:05:41,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:41,806 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:41,808 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-10-13 18:05:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:49,246 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-10-13 18:05:49,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:05:49,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 287 [2019-10-13 18:05:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:49,283 INFO L225 Difference]: With dead ends: 13272 [2019-10-13 18:05:49,284 INFO L226 Difference]: Without dead ends: 7642 [2019-10-13 18:05:49,299 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:05:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-13 18:05:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6236. [2019-10-13 18:05:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2019-10-13 18:05:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 7162 transitions. [2019-10-13 18:05:49,461 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 7162 transitions. Word has length 287 [2019-10-13 18:05:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:49,462 INFO L462 AbstractCegarLoop]: Abstraction has 6236 states and 7162 transitions. [2019-10-13 18:05:49,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:05:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 7162 transitions. [2019-10-13 18:05:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2019-10-13 18:05:49,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:49,478 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:49,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:49,682 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1542869435, now seen corresponding path program 1 times [2019-10-13 18:05:49,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:49,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513299482] [2019-10-13 18:05:49,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:49,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:49,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 204 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-13 18:05:50,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513299482] [2019-10-13 18:05:50,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116183136] [2019-10-13 18:05:50,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:50,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2019-10-13 18:05:50,917 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:50,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:50,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920581713] [2019-10-13 18:05:50,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:50,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:50,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:50,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:50,919 INFO L87 Difference]: Start difference. First operand 6236 states and 7162 transitions. Second operand 5 states. [2019-10-13 18:05:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:52,431 INFO L93 Difference]: Finished difference Result 13846 states and 15934 transitions. [2019-10-13 18:05:52,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:52,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 556 [2019-10-13 18:05:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:52,456 INFO L225 Difference]: With dead ends: 13846 [2019-10-13 18:05:52,456 INFO L226 Difference]: Without dead ends: 7616 [2019-10-13 18:05:52,468 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-10-13 18:05:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7598. [2019-10-13 18:05:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7598 states. [2019-10-13 18:05:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7598 states to 7598 states and 8435 transitions. [2019-10-13 18:05:52,632 INFO L78 Accepts]: Start accepts. Automaton has 7598 states and 8435 transitions. Word has length 556 [2019-10-13 18:05:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:52,640 INFO L462 AbstractCegarLoop]: Abstraction has 7598 states and 8435 transitions. [2019-10-13 18:05:52,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7598 states and 8435 transitions. [2019-10-13 18:05:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2019-10-13 18:05:52,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:52,668 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:52,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:52,872 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 857894719, now seen corresponding path program 1 times [2019-10-13 18:05:52,873 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:52,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620035668] [2019-10-13 18:05:52,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:52,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:52,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 324 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-13 18:05:54,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620035668] [2019-10-13 18:05:54,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704732553] [2019-10-13 18:05:54,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:54,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 686 proven. 2 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-10-13 18:05:54,564 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:54,565 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:54,565 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127665817] [2019-10-13 18:05:54,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:54,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:54,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:54,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:54,568 INFO L87 Difference]: Start difference. First operand 7598 states and 8435 transitions. Second operand 11 states.