/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:22:22,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:22:22,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:22:22,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-21 10:22:22,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:22:22,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:22:22,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:22:22,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:22:22,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:22:22,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:22:22,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:22:22,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:22:22,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:22:22,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:22:22,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:22:22,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:22:22,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:22:22,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:22:22,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:22:22,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:22:22,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:22:22,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:22:22,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:22:22,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:22:22,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:22:22,799 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:22:22,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:22:22,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:22:22,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:22:22,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:22:22,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:22:22,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:22:22,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:22:22,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:22:22,801 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:22:22,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:22:22,802 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:22:22,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:22:22,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:22:22,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:22:22,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:22:22,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:22:22,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:22:22,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:22:22,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:22:22,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:22:22,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:22:22,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:22:22,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:22:22,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:22:22,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:22:23,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:22:23,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:22:23,332 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:22:23,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:22:23,335 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:22:23,336 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-09-21 10:22:23,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85e19fa1d/a9e117517d1d4da8a6ff6151f2743d7d/FLAGb030de3cc [2020-09-21 10:22:24,046 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:22:24,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-09-21 10:22:24,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85e19fa1d/a9e117517d1d4da8a6ff6151f2743d7d/FLAGb030de3cc [2020-09-21 10:22:24,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85e19fa1d/a9e117517d1d4da8a6ff6151f2743d7d [2020-09-21 10:22:24,298 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:22:24,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:22:24,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:22:24,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:22:24,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:22:24,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:22:24" (1/1) ... [2020-09-21 10:22:24,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249e641f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:24, skipping insertion in model container [2020-09-21 10:22:24,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:22:24" (1/1) ... [2020-09-21 10:22:24,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:22:24,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:22:25,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:22:25,025 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:22:25,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:22:25,215 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:22:25,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25 WrapperNode [2020-09-21 10:22:25,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:22:25,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:22:25,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:22:25,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:22:25,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... [2020-09-21 10:22:25,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... [2020-09-21 10:22:25,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... [2020-09-21 10:22:25,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... [2020-09-21 10:22:25,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... [2020-09-21 10:22:25,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... [2020-09-21 10:22:25,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... [2020-09-21 10:22:25,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:22:25,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:22:25,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:22:25,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:22:25,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 10:22:25,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:22:25,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:22:25,467 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-21 10:22:25,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:22:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-21 10:22:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:22:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:22:26,671 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:22:26,671 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:22:26,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:22:26 BoogieIcfgContainer [2020-09-21 10:22:26,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:22:26,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:22:26,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:22:26,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:22:26,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:22:24" (1/3) ... [2020-09-21 10:22:26,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e93eeb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:22:26, skipping insertion in model container [2020-09-21 10:22:26,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:25" (2/3) ... [2020-09-21 10:22:26,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e93eeb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:22:26, skipping insertion in model container [2020-09-21 10:22:26,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:22:26" (3/3) ... [2020-09-21 10:22:26,697 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2020-09-21 10:22:26,708 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:22:26,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:22:26,744 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:22:26,780 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:22:26,780 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:22:26,781 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:22:26,781 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:22:26,781 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:22:26,781 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:22:26,781 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:22:26,781 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:22:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2020-09-21 10:22:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-21 10:22:26,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:26,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:26,824 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1778503114, now seen corresponding path program 1 times [2020-09-21 10:22:26,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:26,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548975593] [2020-09-21 10:22:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:27,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548975593] [2020-09-21 10:22:27,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:27,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:22:27,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963623760] [2020-09-21 10:22:27,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:22:27,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:22:27,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:22:27,575 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 5 states. [2020-09-21 10:22:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:29,896 INFO L93 Difference]: Finished difference Result 723 states and 1255 transitions. [2020-09-21 10:22:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:22:29,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-09-21 10:22:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:29,920 INFO L225 Difference]: With dead ends: 723 [2020-09-21 10:22:29,920 INFO L226 Difference]: Without dead ends: 423 [2020-09-21 10:22:29,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:22:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-09-21 10:22:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 417. [2020-09-21 10:22:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-09-21 10:22:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 584 transitions. [2020-09-21 10:22:30,044 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 584 transitions. Word has length 122 [2020-09-21 10:22:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:30,046 INFO L479 AbstractCegarLoop]: Abstraction has 417 states and 584 transitions. [2020-09-21 10:22:30,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:22:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 584 transitions. [2020-09-21 10:22:30,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-21 10:22:30,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:30,053 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 10:22:30,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:22:30,053 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash -259733235, now seen corresponding path program 1 times [2020-09-21 10:22:30,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:30,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352041860] [2020-09-21 10:22:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:30,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:30,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:30,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352041860] [2020-09-21 10:22:30,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:30,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:22:30,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659670651] [2020-09-21 10:22:30,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:22:30,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:22:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:22:30,299 INFO L87 Difference]: Start difference. First operand 417 states and 584 transitions. Second operand 8 states. [2020-09-21 10:22:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:31,825 INFO L93 Difference]: Finished difference Result 1269 states and 1843 transitions. [2020-09-21 10:22:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:22:31,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2020-09-21 10:22:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:31,834 INFO L225 Difference]: With dead ends: 1269 [2020-09-21 10:22:31,834 INFO L226 Difference]: Without dead ends: 858 [2020-09-21 10:22:31,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:22:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-09-21 10:22:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 834. [2020-09-21 10:22:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-09-21 10:22:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1168 transitions. [2020-09-21 10:22:31,908 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1168 transitions. Word has length 132 [2020-09-21 10:22:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:31,908 INFO L479 AbstractCegarLoop]: Abstraction has 834 states and 1168 transitions. [2020-09-21 10:22:31,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:22:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1168 transitions. [2020-09-21 10:22:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-21 10:22:31,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:31,917 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 10:22:31,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:22:31,917 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2082377679, now seen corresponding path program 1 times [2020-09-21 10:22:31,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:31,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936013982] [2020-09-21 10:22:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:32,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:32,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:32,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936013982] [2020-09-21 10:22:32,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:32,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:22:32,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626903584] [2020-09-21 10:22:32,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:22:32,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:32,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:22:32,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:22:32,362 INFO L87 Difference]: Start difference. First operand 834 states and 1168 transitions. Second operand 6 states. [2020-09-21 10:22:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:33,839 INFO L93 Difference]: Finished difference Result 1769 states and 2519 transitions. [2020-09-21 10:22:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:22:33,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2020-09-21 10:22:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:33,845 INFO L225 Difference]: With dead ends: 1769 [2020-09-21 10:22:33,846 INFO L226 Difference]: Without dead ends: 840 [2020-09-21 10:22:33,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:22:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-09-21 10:22:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 832. [2020-09-21 10:22:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2020-09-21 10:22:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1059 transitions. [2020-09-21 10:22:33,889 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1059 transitions. Word has length 133 [2020-09-21 10:22:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:33,889 INFO L479 AbstractCegarLoop]: Abstraction has 832 states and 1059 transitions. [2020-09-21 10:22:33,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:22:33,890 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1059 transitions. [2020-09-21 10:22:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-21 10:22:33,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:33,897 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 10:22:33,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:22:33,897 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:33,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash 394249543, now seen corresponding path program 1 times [2020-09-21 10:22:33,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:33,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878576525] [2020-09-21 10:22:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:34,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:34,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878576525] [2020-09-21 10:22:34,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:34,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:22:34,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507801327] [2020-09-21 10:22:34,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:22:34,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:22:34,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:22:34,175 INFO L87 Difference]: Start difference. First operand 832 states and 1059 transitions. Second operand 5 states. [2020-09-21 10:22:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:35,182 INFO L93 Difference]: Finished difference Result 2079 states and 2683 transitions. [2020-09-21 10:22:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:22:35,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-09-21 10:22:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:35,196 INFO L225 Difference]: With dead ends: 2079 [2020-09-21 10:22:35,197 INFO L226 Difference]: Without dead ends: 1253 [2020-09-21 10:22:35,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:22:35,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-09-21 10:22:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1243. [2020-09-21 10:22:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-09-21 10:22:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1550 transitions. [2020-09-21 10:22:35,272 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1550 transitions. Word has length 137 [2020-09-21 10:22:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:35,273 INFO L479 AbstractCegarLoop]: Abstraction has 1243 states and 1550 transitions. [2020-09-21 10:22:35,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:22:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1550 transitions. [2020-09-21 10:22:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-21 10:22:35,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:35,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 10:22:35,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:22:35,281 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash 706222219, now seen corresponding path program 1 times [2020-09-21 10:22:35,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:35,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284414255] [2020-09-21 10:22:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:35,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:35,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:35,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:22:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:35,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:22:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-21 10:22:35,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284414255] [2020-09-21 10:22:35,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:35,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:22:35,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746191885] [2020-09-21 10:22:35,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:22:35,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:35,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:22:35,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:22:35,546 INFO L87 Difference]: Start difference. First operand 1243 states and 1550 transitions. Second operand 7 states. [2020-09-21 10:22:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:37,234 INFO L93 Difference]: Finished difference Result 3360 states and 4273 transitions. [2020-09-21 10:22:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:37,235 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-09-21 10:22:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:37,248 INFO L225 Difference]: With dead ends: 3360 [2020-09-21 10:22:37,248 INFO L226 Difference]: Without dead ends: 2123 [2020-09-21 10:22:37,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:22:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-09-21 10:22:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1962. [2020-09-21 10:22:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1962 states. [2020-09-21 10:22:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2370 transitions. [2020-09-21 10:22:37,342 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2370 transitions. Word has length 181 [2020-09-21 10:22:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:37,342 INFO L479 AbstractCegarLoop]: Abstraction has 1962 states and 2370 transitions. [2020-09-21 10:22:37,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:22:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2370 transitions. [2020-09-21 10:22:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-21 10:22:37,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:37,351 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 10:22:37,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:22:37,353 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:37,353 INFO L82 PathProgramCache]: Analyzing trace with hash 853819156, now seen corresponding path program 1 times [2020-09-21 10:22:37,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:37,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806400175] [2020-09-21 10:22:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:37,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:37,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:37,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:22:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:37,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:22:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:22:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-21 10:22:37,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806400175] [2020-09-21 10:22:37,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:37,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:22:37,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883115168] [2020-09-21 10:22:37,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:22:37,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:37,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:22:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:22:37,639 INFO L87 Difference]: Start difference. First operand 1962 states and 2370 transitions. Second operand 7 states. [2020-09-21 10:22:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:38,962 INFO L93 Difference]: Finished difference Result 5487 states and 6885 transitions. [2020-09-21 10:22:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:22:38,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 196 [2020-09-21 10:22:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:38,983 INFO L225 Difference]: With dead ends: 5487 [2020-09-21 10:22:38,983 INFO L226 Difference]: Without dead ends: 3531 [2020-09-21 10:22:38,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:22:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2020-09-21 10:22:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 3360. [2020-09-21 10:22:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2020-09-21 10:22:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4099 transitions. [2020-09-21 10:22:39,101 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4099 transitions. Word has length 196 [2020-09-21 10:22:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:39,102 INFO L479 AbstractCegarLoop]: Abstraction has 3360 states and 4099 transitions. [2020-09-21 10:22:39,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:22:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4099 transitions. [2020-09-21 10:22:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-21 10:22:39,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:39,114 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 10:22:39,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:22:39,114 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1458466897, now seen corresponding path program 1 times [2020-09-21 10:22:39,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:39,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259694373] [2020-09-21 10:22:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:39,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:39,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:39,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:22:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:39,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 10:22:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 80 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 10:22:39,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259694373] [2020-09-21 10:22:39,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:39,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:22:39,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724853718] [2020-09-21 10:22:39,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:22:39,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:22:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:22:39,513 INFO L87 Difference]: Start difference. First operand 3360 states and 4099 transitions. Second operand 7 states. [2020-09-21 10:22:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:40,857 INFO L93 Difference]: Finished difference Result 7002 states and 8519 transitions. [2020-09-21 10:22:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:22:40,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 195 [2020-09-21 10:22:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:40,875 INFO L225 Difference]: With dead ends: 7002 [2020-09-21 10:22:40,875 INFO L226 Difference]: Without dead ends: 3648 [2020-09-21 10:22:40,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:22:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2020-09-21 10:22:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3646. [2020-09-21 10:22:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3646 states. [2020-09-21 10:22:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 4303 transitions. [2020-09-21 10:22:40,979 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 4303 transitions. Word has length 195 [2020-09-21 10:22:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:40,980 INFO L479 AbstractCegarLoop]: Abstraction has 3646 states and 4303 transitions. [2020-09-21 10:22:40,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:22:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 4303 transitions. [2020-09-21 10:22:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-09-21 10:22:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:40,992 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:40,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:22:40,993 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash 426210850, now seen corresponding path program 1 times [2020-09-21 10:22:40,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:40,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098439398] [2020-09-21 10:22:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:41,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:41,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:41,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:22:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:22:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:41,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:22:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 122 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-09-21 10:22:41,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098439398] [2020-09-21 10:22:41,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:41,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:22:41,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061277681] [2020-09-21 10:22:41,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:22:41,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:41,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:22:41,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:22:41,349 INFO L87 Difference]: Start difference. First operand 3646 states and 4303 transitions. Second operand 7 states. [2020-09-21 10:22:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:42,822 INFO L93 Difference]: Finished difference Result 7167 states and 8462 transitions. [2020-09-21 10:22:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:42,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-09-21 10:22:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:42,841 INFO L225 Difference]: With dead ends: 7167 [2020-09-21 10:22:42,842 INFO L226 Difference]: Without dead ends: 3662 [2020-09-21 10:22:42,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:22:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2020-09-21 10:22:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3656. [2020-09-21 10:22:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3656 states. [2020-09-21 10:22:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 4209 transitions. [2020-09-21 10:22:42,985 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 4209 transitions. Word has length 232 [2020-09-21 10:22:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:42,986 INFO L479 AbstractCegarLoop]: Abstraction has 3656 states and 4209 transitions. [2020-09-21 10:22:42,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:22:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 4209 transitions. [2020-09-21 10:22:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-09-21 10:22:43,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:43,001 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:43,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:22:43,002 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash 604394622, now seen corresponding path program 1 times [2020-09-21 10:22:43,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:43,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885180693] [2020-09-21 10:22:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:43,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:43,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:43,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:22:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:43,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:22:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:43,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-21 10:22:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 147 proven. 39 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-09-21 10:22:43,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885180693] [2020-09-21 10:22:43,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:43,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:22:43,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005033230] [2020-09-21 10:22:43,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:22:43,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:22:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:22:43,429 INFO L87 Difference]: Start difference. First operand 3656 states and 4209 transitions. Second operand 9 states. [2020-09-21 10:22:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:48,148 INFO L93 Difference]: Finished difference Result 11217 states and 13877 transitions. [2020-09-21 10:22:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:22:48,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2020-09-21 10:22:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:48,185 INFO L225 Difference]: With dead ends: 11217 [2020-09-21 10:22:48,185 INFO L226 Difference]: Without dead ends: 7702 [2020-09-21 10:22:48,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:22:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7702 states. [2020-09-21 10:22:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7702 to 7406. [2020-09-21 10:22:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7406 states. [2020-09-21 10:22:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7406 states to 7406 states and 9126 transitions. [2020-09-21 10:22:48,390 INFO L78 Accepts]: Start accepts. Automaton has 7406 states and 9126 transitions. Word has length 246 [2020-09-21 10:22:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:48,391 INFO L479 AbstractCegarLoop]: Abstraction has 7406 states and 9126 transitions. [2020-09-21 10:22:48,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:22:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7406 states and 9126 transitions. [2020-09-21 10:22:48,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-09-21 10:22:48,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:48,423 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:48,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:22:48,424 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash -763457286, now seen corresponding path program 1 times [2020-09-21 10:22:48,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:48,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235049846] [2020-09-21 10:22:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:48,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:48,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:22:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:48,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 10:22:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-21 10:22:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 171 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-21 10:22:48,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235049846] [2020-09-21 10:22:48,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:48,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:22:48,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198797393] [2020-09-21 10:22:48,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:22:48,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:22:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:22:48,879 INFO L87 Difference]: Start difference. First operand 7406 states and 9126 transitions. Second operand 10 states. [2020-09-21 10:22:49,584 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-09-21 10:22:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:51,837 INFO L93 Difference]: Finished difference Result 14172 states and 17050 transitions. [2020-09-21 10:22:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:22:51,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 276 [2020-09-21 10:22:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:51,866 INFO L225 Difference]: With dead ends: 14172 [2020-09-21 10:22:51,866 INFO L226 Difference]: Without dead ends: 6907 [2020-09-21 10:22:51,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:22:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6907 states. [2020-09-21 10:22:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6907 to 6883. [2020-09-21 10:22:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6883 states. [2020-09-21 10:22:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6883 states to 6883 states and 7945 transitions. [2020-09-21 10:22:52,037 INFO L78 Accepts]: Start accepts. Automaton has 6883 states and 7945 transitions. Word has length 276 [2020-09-21 10:22:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:52,038 INFO L479 AbstractCegarLoop]: Abstraction has 6883 states and 7945 transitions. [2020-09-21 10:22:52,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:22:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6883 states and 7945 transitions. [2020-09-21 10:22:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-09-21 10:22:52,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:52,055 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:52,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:22:52,055 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2075847519, now seen corresponding path program 1 times [2020-09-21 10:22:52,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:52,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108151994] [2020-09-21 10:22:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:52,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:52,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:22:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:52,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 10:22:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:52,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:22:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:52,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-21 10:22:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 225 proven. 31 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-09-21 10:22:52,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108151994] [2020-09-21 10:22:52,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:52,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:22:52,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56265079] [2020-09-21 10:22:52,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:22:52,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:22:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:22:52,669 INFO L87 Difference]: Start difference. First operand 6883 states and 7945 transitions. Second operand 9 states. [2020-09-21 10:22:54,535 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-09-21 10:22:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:55,052 INFO L93 Difference]: Finished difference Result 13655 states and 15775 transitions. [2020-09-21 10:22:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:22:55,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 289 [2020-09-21 10:22:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:55,071 INFO L225 Difference]: With dead ends: 13655 [2020-09-21 10:22:55,071 INFO L226 Difference]: Without dead ends: 6913 [2020-09-21 10:22:55,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:22:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2020-09-21 10:22:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6885. [2020-09-21 10:22:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6885 states. [2020-09-21 10:22:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 7926 transitions. [2020-09-21 10:22:55,216 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 7926 transitions. Word has length 289 [2020-09-21 10:22:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:55,217 INFO L479 AbstractCegarLoop]: Abstraction has 6885 states and 7926 transitions. [2020-09-21 10:22:55,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:22:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 7926 transitions. [2020-09-21 10:22:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-09-21 10:22:55,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:55,238 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:55,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:22:55,239 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:55,239 INFO L82 PathProgramCache]: Analyzing trace with hash -394947665, now seen corresponding path program 1 times [2020-09-21 10:22:55,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:55,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905404924] [2020-09-21 10:22:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:55,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:55,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:55,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:22:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:55,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 10:22:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:55,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:22:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:55,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:22:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 262 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-09-21 10:22:55,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905404924] [2020-09-21 10:22:55,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:55,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:22:55,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171124787] [2020-09-21 10:22:55,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:22:55,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:22:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:22:55,679 INFO L87 Difference]: Start difference. First operand 6885 states and 7926 transitions. Second operand 8 states. [2020-09-21 10:22:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:56,870 INFO L93 Difference]: Finished difference Result 13538 states and 15450 transitions. [2020-09-21 10:22:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:22:56,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 308 [2020-09-21 10:22:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:56,890 INFO L225 Difference]: With dead ends: 13538 [2020-09-21 10:22:56,891 INFO L226 Difference]: Without dead ends: 6796 [2020-09-21 10:22:56,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:22:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6796 states. [2020-09-21 10:22:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6796 to 6053. [2020-09-21 10:22:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6053 states. [2020-09-21 10:22:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 6739 transitions. [2020-09-21 10:22:57,128 INFO L78 Accepts]: Start accepts. Automaton has 6053 states and 6739 transitions. Word has length 308 [2020-09-21 10:22:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:57,129 INFO L479 AbstractCegarLoop]: Abstraction has 6053 states and 6739 transitions. [2020-09-21 10:22:57,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:22:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6053 states and 6739 transitions. [2020-09-21 10:22:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-09-21 10:22:57,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:57,147 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 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] [2020-09-21 10:22:57,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:22:57,148 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash 874817583, now seen corresponding path program 1 times [2020-09-21 10:22:57,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:57,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586673325] [2020-09-21 10:22:57,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:57,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:57,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:57,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:22:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:57,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 10:22:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:57,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:22:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:57,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-21 10:22:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 198 proven. 5 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-09-21 10:22:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586673325] [2020-09-21 10:22:57,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:57,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:22:57,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657580758] [2020-09-21 10:22:57,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:22:57,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:22:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:22:57,614 INFO L87 Difference]: Start difference. First operand 6053 states and 6739 transitions. Second operand 5 states. [2020-09-21 10:22:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:58,721 INFO L93 Difference]: Finished difference Result 12515 states and 13928 transitions. [2020-09-21 10:22:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:22:58,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-09-21 10:22:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:58,738 INFO L225 Difference]: With dead ends: 12515 [2020-09-21 10:22:58,738 INFO L226 Difference]: Without dead ends: 5497 [2020-09-21 10:22:58,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:22:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5497 states. [2020-09-21 10:22:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5497 to 5344. [2020-09-21 10:22:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2020-09-21 10:22:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5826 transitions. [2020-09-21 10:22:58,856 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5826 transitions. Word has length 313 [2020-09-21 10:22:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:58,857 INFO L479 AbstractCegarLoop]: Abstraction has 5344 states and 5826 transitions. [2020-09-21 10:22:58,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:22:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5826 transitions. [2020-09-21 10:22:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-09-21 10:22:58,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:58,874 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:58,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:22:58,874 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:58,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1264462194, now seen corresponding path program 1 times [2020-09-21 10:22:58,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:58,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567866667] [2020-09-21 10:22:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:22:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:22:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 10:22:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:22:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-21 10:22:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-21 10:22:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 184 proven. 21 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-09-21 10:22:59,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567866667] [2020-09-21 10:22:59,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:59,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:22:59,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335349318] [2020-09-21 10:22:59,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:22:59,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:22:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:22:59,451 INFO L87 Difference]: Start difference. First operand 5344 states and 5826 transitions. Second operand 6 states. [2020-09-21 10:23:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:23:00,746 INFO L93 Difference]: Finished difference Result 5904 states and 6477 transitions. [2020-09-21 10:23:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:23:00,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 318 [2020-09-21 10:23:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:23:00,763 INFO L225 Difference]: With dead ends: 5904 [2020-09-21 10:23:00,763 INFO L226 Difference]: Without dead ends: 5902 [2020-09-21 10:23:00,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:23:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5902 states. [2020-09-21 10:23:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5902 to 5479. [2020-09-21 10:23:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5479 states. [2020-09-21 10:23:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 5996 transitions. [2020-09-21 10:23:00,867 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 5996 transitions. Word has length 318 [2020-09-21 10:23:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:23:00,868 INFO L479 AbstractCegarLoop]: Abstraction has 5479 states and 5996 transitions. [2020-09-21 10:23:00,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:23:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 5996 transitions. [2020-09-21 10:23:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-09-21 10:23:00,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:23:00,893 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 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] [2020-09-21 10:23:00,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:23:00,894 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:23:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:23:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash 41074506, now seen corresponding path program 1 times [2020-09-21 10:23:00,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:23:00,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633036954] [2020-09-21 10:23:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:23:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:23:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:23:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:23:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 10:23:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:23:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-21 10:23:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-21 10:23:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 357 proven. 25 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-09-21 10:23:01,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633036954] [2020-09-21 10:23:01,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:23:01,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:23:01,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072817109] [2020-09-21 10:23:01,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:23:01,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:23:01,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:23:01,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:23:01,853 INFO L87 Difference]: Start difference. First operand 5479 states and 5996 transitions. Second operand 12 states. [2020-09-21 10:23:02,274 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-09-21 10:23:02,831 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-09-21 10:23:04,307 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-09-21 10:23:04,940 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-09-21 10:23:05,896 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-09-21 10:23:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:23:06,517 INFO L93 Difference]: Finished difference Result 10259 states and 11214 transitions. [2020-09-21 10:23:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 10:23:06,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 338 [2020-09-21 10:23:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:23:06,531 INFO L225 Difference]: With dead ends: 10259 [2020-09-21 10:23:06,532 INFO L226 Difference]: Without dead ends: 4923 [2020-09-21 10:23:06,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2020-09-21 10:23:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4923 states. [2020-09-21 10:23:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4923 to 4905. [2020-09-21 10:23:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4905 states. [2020-09-21 10:23:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 5319 transitions. [2020-09-21 10:23:06,622 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 5319 transitions. Word has length 338 [2020-09-21 10:23:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:23:06,623 INFO L479 AbstractCegarLoop]: Abstraction has 4905 states and 5319 transitions. [2020-09-21 10:23:06,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:23:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 5319 transitions. [2020-09-21 10:23:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-09-21 10:23:06,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:23:06,638 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 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] [2020-09-21 10:23:06,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:23:06,638 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:23:06,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:23:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1269018866, now seen corresponding path program 1 times [2020-09-21 10:23:06,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:23:06,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655681244] [2020-09-21 10:23:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:23:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:06,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:23:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:06,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:23:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:06,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:23:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:06,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-21 10:23:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:06,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-21 10:23:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:06,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-09-21 10:23:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:06,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-21 10:23:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:23:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 224 proven. 24 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2020-09-21 10:23:07,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655681244] [2020-09-21 10:23:07,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:23:07,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:23:07,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105764136] [2020-09-21 10:23:07,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:23:07,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:23:07,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:23:07,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:23:07,113 INFO L87 Difference]: Start difference. First operand 4905 states and 5319 transitions. Second operand 7 states. [2020-09-21 10:23:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:23:08,461 INFO L93 Difference]: Finished difference Result 8974 states and 9763 transitions. [2020-09-21 10:23:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:23:08,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 358 [2020-09-21 10:23:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:23:08,464 INFO L225 Difference]: With dead ends: 8974 [2020-09-21 10:23:08,465 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:23:08,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:23:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:23:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:23:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:23:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:23:08,479 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 358 [2020-09-21 10:23:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:23:08,480 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:23:08,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:23:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:23:08,480 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:23:08,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:23:08,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:23:09,781 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-09-21 10:23:11,642 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 215 [2020-09-21 10:23:12,470 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 215 [2020-09-21 10:23:12,655 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40