/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:56:27,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:56:27,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:56:27,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:56:27,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:56:27,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:56:27,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:56:27,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:56:27,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:56:27,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:56:27,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:56:27,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:56:27,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:56:27,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:56:27,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:56:27,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:56:27,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:56:27,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:56:27,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:56:27,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:56:27,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:56:27,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:56:27,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:56:27,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:56:27,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:56:27,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:56:27,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:56:27,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:56:27,956 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 [2020-08-19 02:56:27,977 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:56:27,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:56:27,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:56:27,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:56:27,979 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:56:27,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:56:27,979 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:56:27,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:56:27,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:56:27,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:56:27,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:56:27,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:56:27,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:56:27,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:56:27,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:56:27,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:56:27,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:56:27,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:56:27,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:56:27,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:56:27,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:56:27,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:56:27,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:56:27,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:56:27,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:56:27,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:56:27,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:56:27,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:56:27,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:56:27,984 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:56:28,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:56:28,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:56:28,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:56:28,268 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:56:28,269 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:56:28,269 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 02:56:28,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d73c9ab6/ce39b13b0162454bbec99332f5b821a6/FLAG577500bf2 [2020-08-19 02:56:28,921 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:56:28,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 02:56:28,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d73c9ab6/ce39b13b0162454bbec99332f5b821a6/FLAG577500bf2 [2020-08-19 02:56:29,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d73c9ab6/ce39b13b0162454bbec99332f5b821a6 [2020-08-19 02:56:29,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:56:29,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:56:29,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:56:29,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:56:29,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:56:29,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:56:29" (1/1) ... [2020-08-19 02:56:29,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae5b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:29, skipping insertion in model container [2020-08-19 02:56:29,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:56:29" (1/1) ... [2020-08-19 02:56:29,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:56:29,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:56:29,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:56:30,001 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:56:30,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:56:30,556 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:56:30,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30 WrapperNode [2020-08-19 02:56:30,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:56:30,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:56:30,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:56:30,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:56:30,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (1/1) ... [2020-08-19 02:56:30,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (1/1) ... [2020-08-19 02:56:30,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (1/1) ... [2020-08-19 02:56:30,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (1/1) ... [2020-08-19 02:56:30,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (1/1) ... [2020-08-19 02:56:30,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (1/1) ... [2020-08-19 02:56:30,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (1/1) ... [2020-08-19 02:56:30,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:56:30,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:56:30,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:56:30,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:56:30,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (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 [2020-08-19 02:56:30,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:56:30,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:56:30,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 02:56:30,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:56:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:56:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 02:56:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 02:56:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-19 02:56:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 02:56:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 02:56:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-19 02:56:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-19 02:56:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-19 02:56:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-19 02:56:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-19 02:56:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 02:56:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 02:56:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:56:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:56:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:56:32,607 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:56:32,609 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:56:32,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:56:32 BoogieIcfgContainer [2020-08-19 02:56:32,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:56:32,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:56:32,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:56:32,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:56:32,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:56:29" (1/3) ... [2020-08-19 02:56:32,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738fb2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:56:32, skipping insertion in model container [2020-08-19 02:56:32,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:56:30" (2/3) ... [2020-08-19 02:56:32,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738fb2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:56:32, skipping insertion in model container [2020-08-19 02:56:32,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:56:32" (3/3) ... [2020-08-19 02:56:32,634 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 02:56:32,645 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:56:32,657 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-19 02:56:32,672 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-19 02:56:32,706 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:56:32,707 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:56:32,707 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:56:32,707 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:56:32,707 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:56:32,707 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:56:32,707 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:56:32,707 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:56:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-19 02:56:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 02:56:32,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:32,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:32,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-19 02:56:32,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:32,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662654563] [2020-08-19 02:56:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:33,827 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:33,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662654563] [2020-08-19 02:56:33,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:33,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:33,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267578317] [2020-08-19 02:56:33,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:33,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:33,967 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-19 02:56:34,301 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 02:56:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:37,157 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-19 02:56:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:56:37,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 02:56:37,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:37,180 INFO L225 Difference]: With dead ends: 754 [2020-08-19 02:56:37,181 INFO L226 Difference]: Without dead ends: 593 [2020-08-19 02:56:37,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:56:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-19 02:56:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-19 02:56:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-19 02:56:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-19 02:56:37,284 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-19 02:56:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:37,285 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-19 02:56:37,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:56:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-19 02:56:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 02:56:37,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:37,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:37,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:56:37,291 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:37,291 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-19 02:56:37,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:37,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163832686] [2020-08-19 02:56:37,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:37,659 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:37,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:37,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163832686] [2020-08-19 02:56:37,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:37,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:37,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696343370] [2020-08-19 02:56:37,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:37,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:37,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:37,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:37,710 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-19 02:56:38,007 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 02:56:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:40,132 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-19 02:56:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:56:40,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 02:56:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:40,142 INFO L225 Difference]: With dead ends: 1190 [2020-08-19 02:56:40,142 INFO L226 Difference]: Without dead ends: 961 [2020-08-19 02:56:40,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:56:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-19 02:56:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-19 02:56:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-19 02:56:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-19 02:56:40,220 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-19 02:56:40,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:40,221 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-19 02:56:40,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:56:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-19 02:56:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 02:56:40,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:40,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:40,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:56:40,234 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:40,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-19 02:56:40,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:40,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075443810] [2020-08-19 02:56:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:40,698 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:40,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:40,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075443810] [2020-08-19 02:56:40,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:40,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:40,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061164671] [2020-08-19 02:56:40,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:40,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:40,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:40,780 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-19 02:56:41,065 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 02:56:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:43,271 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-19 02:56:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:56:43,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 02:56:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:43,286 INFO L225 Difference]: With dead ends: 2090 [2020-08-19 02:56:43,286 INFO L226 Difference]: Without dead ends: 1701 [2020-08-19 02:56:43,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:56:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-19 02:56:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-19 02:56:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-19 02:56:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-19 02:56:43,373 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-19 02:56:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:43,374 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-19 02:56:43,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:56:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-19 02:56:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 02:56:43,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:43,378 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:43,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:56:43,380 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-19 02:56:43,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:43,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259621521] [2020-08-19 02:56:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:44,082 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:44,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:44,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259621521] [2020-08-19 02:56:44,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:44,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:56:44,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832060372] [2020-08-19 02:56:44,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:56:44,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:44,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:56:44,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:56:44,165 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-19 02:56:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:47,665 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-19 02:56:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:56:47,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-19 02:56:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:47,685 INFO L225 Difference]: With dead ends: 4967 [2020-08-19 02:56:47,685 INFO L226 Difference]: Without dead ends: 3281 [2020-08-19 02:56:47,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:56:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-19 02:56:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-19 02:56:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-19 02:56:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-19 02:56:47,837 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-19 02:56:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:47,837 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-19 02:56:47,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:56:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-19 02:56:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-19 02:56:47,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:47,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:47,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:56:47,847 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:47,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-19 02:56:47,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:47,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190382272] [2020-08-19 02:56:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:48,236 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:48,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:48,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190382272] [2020-08-19 02:56:48,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:48,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:48,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185624583] [2020-08-19 02:56:48,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:48,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:48,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:48,293 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-19 02:56:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:51,028 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-19 02:56:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:56:51,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-19 02:56:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:51,060 INFO L225 Difference]: With dead ends: 9659 [2020-08-19 02:56:51,060 INFO L226 Difference]: Without dead ends: 6456 [2020-08-19 02:56:51,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-19 02:56:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-19 02:56:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-19 02:56:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-19 02:56:51,241 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-19 02:56:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:51,241 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-19 02:56:51,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:56:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-19 02:56:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-19 02:56:51,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:51,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:51,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:56:51,247 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:51,252 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-19 02:56:51,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:51,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236182197] [2020-08-19 02:56:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:51,670 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:51,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:51,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236182197] [2020-08-19 02:56:51,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:51,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:56:51,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548614950] [2020-08-19 02:56:51,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:56:51,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:56:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:56:51,736 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-19 02:56:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:54,993 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-19 02:56:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:56:54,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-19 02:56:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:55,021 INFO L225 Difference]: With dead ends: 9441 [2020-08-19 02:56:55,021 INFO L226 Difference]: Without dead ends: 6238 [2020-08-19 02:56:55,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:56:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-19 02:56:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-19 02:56:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-19 02:56:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-19 02:56:55,302 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-19 02:56:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:55,303 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-19 02:56:55,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:56:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-19 02:56:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-19 02:56:55,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:55,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:55,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:56:55,318 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:55,318 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-19 02:56:55,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:55,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453813707] [2020-08-19 02:56:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:55,626 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:55,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:55,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453813707] [2020-08-19 02:56:55,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:55,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:55,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180951903] [2020-08-19 02:56:55,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:55,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:55,663 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-19 02:56:59,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:56:59,041 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-19 02:56:59,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:56:59,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-19 02:56:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:56:59,084 INFO L225 Difference]: With dead ends: 18492 [2020-08-19 02:56:59,085 INFO L226 Difference]: Without dead ends: 12348 [2020-08-19 02:56:59,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-19 02:56:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-19 02:56:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-19 02:56:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-19 02:56:59,460 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-19 02:56:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:56:59,460 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-19 02:56:59,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:56:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-19 02:56:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 02:56:59,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:56:59,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:56:59,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:56:59,470 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:56:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:56:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-19 02:56:59,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:56:59,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437693257] [2020-08-19 02:56:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:56:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:59,772 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:56:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:56:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:56:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:56:59,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437693257] [2020-08-19 02:56:59,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:56:59,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:56:59,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956551174] [2020-08-19 02:56:59,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:56:59,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:56:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:56:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:56:59,819 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-19 02:57:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:03,050 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-19 02:57:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:57:03,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-19 02:57:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:03,073 INFO L225 Difference]: With dead ends: 16495 [2020-08-19 02:57:03,073 INFO L226 Difference]: Without dead ends: 10615 [2020-08-19 02:57:03,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:57:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-19 02:57:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-19 02:57:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-19 02:57:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-19 02:57:03,652 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-19 02:57:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:03,652 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-19 02:57:03,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:57:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-19 02:57:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 02:57:03,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:03,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:57:03,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:57:03,667 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:03,667 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-19 02:57:03,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:03,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153862929] [2020-08-19 02:57:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:03,990 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:57:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:04,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153862929] [2020-08-19 02:57:04,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:04,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:57:04,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800290556] [2020-08-19 02:57:04,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:57:04,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:04,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:57:04,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:57:04,026 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-19 02:57:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:06,425 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-19 02:57:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:57:06,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-19 02:57:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:06,451 INFO L225 Difference]: With dead ends: 21564 [2020-08-19 02:57:06,452 INFO L226 Difference]: Without dead ends: 10851 [2020-08-19 02:57:06,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:57:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-19 02:57:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-19 02:57:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-19 02:57:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-19 02:57:06,961 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-19 02:57:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:06,961 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-19 02:57:06,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:57:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-19 02:57:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 02:57:06,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:06,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:57:06,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:57:06,977 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-19 02:57:06,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:06,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138381606] [2020-08-19 02:57:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:07,354 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:57:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:07,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138381606] [2020-08-19 02:57:07,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:07,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:57:07,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640096729] [2020-08-19 02:57:07,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:57:07,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:07,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:57:07,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:57:07,920 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-19 02:57:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:11,225 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-19 02:57:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:57:11,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-19 02:57:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:11,244 INFO L225 Difference]: With dead ends: 15230 [2020-08-19 02:57:11,244 INFO L226 Difference]: Without dead ends: 10851 [2020-08-19 02:57:11,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:57:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-19 02:57:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-19 02:57:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-19 02:57:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-19 02:57:11,785 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-19 02:57:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:11,787 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-19 02:57:11,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:57:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-19 02:57:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-19 02:57:11,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:11,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:57:11,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:57:11,810 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:11,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-19 02:57:11,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:11,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075683676] [2020-08-19 02:57:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:12,197 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:57:12,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:12,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075683676] [2020-08-19 02:57:12,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:12,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:57:12,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896108580] [2020-08-19 02:57:12,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:57:12,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:12,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:57:12,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:57:12,253 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-19 02:57:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:16,138 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-19 02:57:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:57:16,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-19 02:57:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:16,160 INFO L225 Difference]: With dead ends: 25409 [2020-08-19 02:57:16,161 INFO L226 Difference]: Without dead ends: 21030 [2020-08-19 02:57:16,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:57:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-19 02:57:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-19 02:57:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-19 02:57:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-19 02:57:16,728 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-19 02:57:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:16,729 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-19 02:57:16,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:57:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-19 02:57:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-19 02:57:16,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:16,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:57:16,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:57:16,741 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-19 02:57:16,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:16,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481277539] [2020-08-19 02:57:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:17,113 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:57:17,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:17,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481277539] [2020-08-19 02:57:17,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:17,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:57:17,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148541889] [2020-08-19 02:57:17,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:57:17,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:17,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:57:17,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:57:17,162 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-19 02:57:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:57:20,495 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-19 02:57:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:57:20,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-19 02:57:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:57:20,515 INFO L225 Difference]: With dead ends: 30843 [2020-08-19 02:57:20,515 INFO L226 Difference]: Without dead ends: 20313 [2020-08-19 02:57:20,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:57:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-19 02:57:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-19 02:57:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-19 02:57:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-19 02:57:21,390 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-19 02:57:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:57:21,391 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-19 02:57:21,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:57:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-19 02:57:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-19 02:57:21,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:57:21,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:57:21,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:57:21,409 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:57:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:57:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-19 02:57:21,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:57:21,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063407059] [2020-08-19 02:57:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:57:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:21,811 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 02:57:21,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:57:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:57:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:57:21,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063407059] [2020-08-19 02:57:21,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:57:21,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:57:21,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043983115] [2020-08-19 02:57:21,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:57:21,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:57:21,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:57:21,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:57:21,890 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states.