/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 23:09:28,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:09:28,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:09:28,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:09:28,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:09:28,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:09:28,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:09:28,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:09:28,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:09:28,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:09:28,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:09:28,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:09:28,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:09:28,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:09:28,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:09:28,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:09:28,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:09:28,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:09:28,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:09:28,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:09:28,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:09:28,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:09:28,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:09:28,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:09:28,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:09:28,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:09:28,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:09:28,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:09:28,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:09:28,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 23:09:28,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:09:28,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:09:28,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:09:28,455 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 [2020-08-21 23:09:28,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:09:28,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:09:28,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:09:28,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:09:28,508 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:09:28,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:09:28,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:09:28,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:09:28,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:09:28,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:09:28,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:09:28,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:09:28,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:09:28,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:09:28,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:09:28,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:09:28,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:09:28,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:09:28,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:09:28,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:09:28,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:09:28,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:09:28,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:09:28,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:09:28,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:09:28,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:09:28,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:09:28,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:09:28,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:09:28,513 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 23:09:28,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:09:28,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:09:28,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:09:28,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:09:28,836 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:09:28,837 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 23:09:28,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14cda0b53/a024331160c84e37ba02220a5aec1485/FLAGd1cce2846 [2020-08-21 23:09:29,490 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:09:29,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 23:09:29,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14cda0b53/a024331160c84e37ba02220a5aec1485/FLAGd1cce2846 [2020-08-21 23:09:29,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14cda0b53/a024331160c84e37ba02220a5aec1485 [2020-08-21 23:09:29,718 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:09:29,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:09:29,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:09:29,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:09:29,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:09:29,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:09:29" (1/1) ... [2020-08-21 23:09:29,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b134fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:29, skipping insertion in model container [2020-08-21 23:09:29,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:09:29" (1/1) ... [2020-08-21 23:09:29,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:09:29,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:09:30,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:09:30,502 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:09:31,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:09:31,050 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:09:31,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31 WrapperNode [2020-08-21 23:09:31,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:09:31,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:09:31,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:09:31,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:09:31,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (1/1) ... [2020-08-21 23:09:31,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (1/1) ... [2020-08-21 23:09:31,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (1/1) ... [2020-08-21 23:09:31,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (1/1) ... [2020-08-21 23:09:31,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (1/1) ... [2020-08-21 23:09:31,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (1/1) ... [2020-08-21 23:09:31,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (1/1) ... [2020-08-21 23:09:31,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:09:31,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:09:31,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:09:31,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:09:31,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (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 [2020-08-21 23:09:31,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:09:31,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:09:31,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 23:09:31,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:09:31,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:09:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 23:09:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 23:09:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-21 23:09:31,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 23:09:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 23:09:31,251 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-21 23:09:31,252 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-21 23:09:31,252 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-21 23:09:31,252 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-21 23:09:31,253 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-21 23:09:31,253 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-21 23:09:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-21 23:09:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:09:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:09:31,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:09:32,840 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:09:32,840 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 23:09:32,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:09:32 BoogieIcfgContainer [2020-08-21 23:09:32,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:09:32,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:09:32,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:09:32,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:09:32,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:09:29" (1/3) ... [2020-08-21 23:09:32,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198290d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:09:32, skipping insertion in model container [2020-08-21 23:09:32,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:09:31" (2/3) ... [2020-08-21 23:09:32,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198290d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:09:32, skipping insertion in model container [2020-08-21 23:09:32,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:09:32" (3/3) ... [2020-08-21 23:09:32,859 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-21 23:09:32,872 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:09:32,881 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-21 23:09:32,898 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-21 23:09:32,928 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:09:32,928 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:09:32,928 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:09:32,929 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:09:32,929 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:09:32,929 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:09:32,929 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:09:32,929 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:09:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-21 23:09:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 23:09:32,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:32,980 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] [2020-08-21 23:09:32,981 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-21 23:09:32,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:32,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586816202] [2020-08-21 23:09:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:34,061 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:09:34,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:09:34,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586816202] [2020-08-21 23:09:34,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:34,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:09:34,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491487146] [2020-08-21 23:09:34,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:09:34,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:34,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:09:34,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:09:34,180 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-21 23:09:34,474 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 23:09:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:37,284 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-21 23:09:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:09:37,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 23:09:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:37,313 INFO L225 Difference]: With dead ends: 754 [2020-08-21 23:09:37,314 INFO L226 Difference]: Without dead ends: 593 [2020-08-21 23:09:37,319 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 [2020-08-21 23:09:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-21 23:09:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-21 23:09:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-21 23:09:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-21 23:09:37,422 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-21 23:09:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:37,423 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-21 23:09:37,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:09:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-21 23:09:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 23:09:37,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:37,429 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] [2020-08-21 23:09:37,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:09:37,429 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-21 23:09:37,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:37,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450525575] [2020-08-21 23:09:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:37,974 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:09:37,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:09:38,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450525575] [2020-08-21 23:09:38,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:38,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:09:38,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690243410] [2020-08-21 23:09:38,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:09:38,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:09:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:09:38,055 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-21 23:09:38,449 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 23:09:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:40,585 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-21 23:09:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:09:40,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 23:09:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:40,598 INFO L225 Difference]: With dead ends: 1190 [2020-08-21 23:09:40,598 INFO L226 Difference]: Without dead ends: 961 [2020-08-21 23:09:40,604 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 [2020-08-21 23:09:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-21 23:09:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-21 23:09:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-21 23:09:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-21 23:09:40,691 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-21 23:09:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:40,693 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-21 23:09:40,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:09:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-21 23:09:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 23:09:40,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:40,702 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] [2020-08-21 23:09:40,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:09:40,702 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-21 23:09:40,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:40,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265948546] [2020-08-21 23:09:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:41,239 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:09:41,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:09:41,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265948546] [2020-08-21 23:09:41,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:41,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:09:41,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028628979] [2020-08-21 23:09:41,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:09:41,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:41,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:09:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:09:41,338 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-21 23:09:41,709 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-21 23:09:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:44,066 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-21 23:09:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:09:44,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-21 23:09:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:44,081 INFO L225 Difference]: With dead ends: 2090 [2020-08-21 23:09:44,082 INFO L226 Difference]: Without dead ends: 1701 [2020-08-21 23:09:44,086 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 [2020-08-21 23:09:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-21 23:09:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-21 23:09:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-21 23:09:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-21 23:09:44,188 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-21 23:09:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:44,189 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-21 23:09:44,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:09:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-21 23:09:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 23:09:44,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:44,198 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] [2020-08-21 23:09:44,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:09:44,199 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:44,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-21 23:09:44,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:44,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111984018] [2020-08-21 23:09:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:44,768 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:09:44,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:09:44,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111984018] [2020-08-21 23:09:44,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:44,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:09:44,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993900725] [2020-08-21 23:09:44,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:09:44,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:09:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:09:44,822 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-21 23:09:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:48,325 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-21 23:09:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:09:48,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-21 23:09:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:48,349 INFO L225 Difference]: With dead ends: 4967 [2020-08-21 23:09:48,349 INFO L226 Difference]: Without dead ends: 3281 [2020-08-21 23:09:48,356 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 [2020-08-21 23:09:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-21 23:09:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-21 23:09:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-21 23:09:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-21 23:09:48,633 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-21 23:09:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:48,634 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-21 23:09:48,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:09:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-21 23:09:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 23:09:48,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:48,644 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] [2020-08-21 23:09:48,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:09:48,650 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-21 23:09:48,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:48,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527338039] [2020-08-21 23:09:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:49,092 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:09:49,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:09:49,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527338039] [2020-08-21 23:09:49,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:49,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:09:49,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442040509] [2020-08-21 23:09:49,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:09:49,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:49,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:09:49,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:09:49,158 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-21 23:09:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:51,799 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-21 23:09:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:09:51,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-21 23:09:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:51,830 INFO L225 Difference]: With dead ends: 9659 [2020-08-21 23:09:51,830 INFO L226 Difference]: Without dead ends: 6456 [2020-08-21 23:09:51,838 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 [2020-08-21 23:09:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-21 23:09:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-21 23:09:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-21 23:09:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-21 23:09:52,012 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-21 23:09:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:52,013 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-21 23:09:52,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:09:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-21 23:09:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 23:09:52,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:52,023 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] [2020-08-21 23:09:52,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:09:52,023 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:52,027 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-21 23:09:52,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:52,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692832052] [2020-08-21 23:09:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:52,497 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:09:52,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:09:52,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692832052] [2020-08-21 23:09:52,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:52,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:09:52,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085071580] [2020-08-21 23:09:52,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:09:52,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:09:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:09:52,548 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-21 23:09:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:55,607 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-21 23:09:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:09:55,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-21 23:09:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:55,635 INFO L225 Difference]: With dead ends: 9441 [2020-08-21 23:09:55,635 INFO L226 Difference]: Without dead ends: 6238 [2020-08-21 23:09:55,642 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 [2020-08-21 23:09:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-21 23:09:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-21 23:09:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-21 23:09:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-21 23:09:55,919 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-21 23:09:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:55,920 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-21 23:09:55,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:09:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-21 23:09:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-21 23:09:55,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:55,931 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] [2020-08-21 23:09:55,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:09:55,932 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:55,933 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-21 23:09:55,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:55,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797214307] [2020-08-21 23:09:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:56,226 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:09:56,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:09:56,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797214307] [2020-08-21 23:09:56,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:56,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:09:56,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810511014] [2020-08-21 23:09:56,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:09:56,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:56,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:09:56,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:09:56,273 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-21 23:09:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:59,721 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-21 23:09:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:09:59,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-21 23:09:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:59,766 INFO L225 Difference]: With dead ends: 18492 [2020-08-21 23:09:59,766 INFO L226 Difference]: Without dead ends: 12348 [2020-08-21 23:09:59,779 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 [2020-08-21 23:09:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-21 23:10:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-21 23:10:00,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-21 23:10:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-21 23:10:00,069 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-21 23:10:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:10:00,070 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-21 23:10:00,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:10:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-21 23:10:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 23:10:00,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:10:00,079 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] [2020-08-21 23:10:00,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:10:00,079 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:10:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:10:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-21 23:10:00,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:10:00,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209267681] [2020-08-21 23:10:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:10:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:00,429 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:10:00,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:10:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:10:00,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209267681] [2020-08-21 23:10:00,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:10:00,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:10:00,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483576798] [2020-08-21 23:10:00,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:10:00,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:10:00,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:10:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:10:00,523 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-21 23:10:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:10:04,302 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-21 23:10:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:10:04,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-21 23:10:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:10:04,339 INFO L225 Difference]: With dead ends: 16495 [2020-08-21 23:10:04,339 INFO L226 Difference]: Without dead ends: 10615 [2020-08-21 23:10:04,351 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 [2020-08-21 23:10:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-21 23:10:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-21 23:10:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-21 23:10:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-21 23:10:04,763 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-21 23:10:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:10:04,764 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-21 23:10:04,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:10:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-21 23:10:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 23:10:04,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:10:04,779 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] [2020-08-21 23:10:04,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:10:04,780 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:10:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:10:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-21 23:10:04,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:10:04,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064088473] [2020-08-21 23:10:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:10:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:05,141 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:10:05,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:10:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:10:05,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064088473] [2020-08-21 23:10:05,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:10:05,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:10:05,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336137803] [2020-08-21 23:10:05,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:10:05,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:10:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:10:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:10:05,180 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-21 23:10:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:10:07,676 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-21 23:10:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:10:07,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 23:10:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:10:07,700 INFO L225 Difference]: With dead ends: 21564 [2020-08-21 23:10:07,700 INFO L226 Difference]: Without dead ends: 10851 [2020-08-21 23:10:07,719 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 [2020-08-21 23:10:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-21 23:10:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-21 23:10:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-21 23:10:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-21 23:10:08,852 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-21 23:10:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:10:08,853 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-21 23:10:08,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:10:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-21 23:10:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 23:10:08,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:10:08,865 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] [2020-08-21 23:10:08,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:10:08,866 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:10:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:10:08,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-21 23:10:08,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:10:08,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556669814] [2020-08-21 23:10:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:10:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:09,238 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:10:09,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:10:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:10:09,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556669814] [2020-08-21 23:10:09,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:10:09,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:10:09,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458967981] [2020-08-21 23:10:09,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:10:09,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:10:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:10:09,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:10:09,293 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-21 23:10:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:10:12,718 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-21 23:10:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:10:12,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-21 23:10:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:10:12,740 INFO L225 Difference]: With dead ends: 15230 [2020-08-21 23:10:12,740 INFO L226 Difference]: Without dead ends: 10851 [2020-08-21 23:10:12,750 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 [2020-08-21 23:10:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-21 23:10:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-21 23:10:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-21 23:10:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-21 23:10:13,192 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-21 23:10:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:10:13,192 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-21 23:10:13,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:10:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-21 23:10:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 23:10:13,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:10:13,204 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] [2020-08-21 23:10:13,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:10:13,204 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:10:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:10:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-21 23:10:13,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:10:13,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999981727] [2020-08-21 23:10:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:10:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:13,494 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:10:13,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:10:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:10:13,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999981727] [2020-08-21 23:10:13,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:10:13,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:10:13,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993513377] [2020-08-21 23:10:13,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:10:13,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:10:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:10:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:10:13,532 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-21 23:10:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:10:17,525 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-21 23:10:17,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:10:17,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-21 23:10:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:10:17,563 INFO L225 Difference]: With dead ends: 25409 [2020-08-21 23:10:17,563 INFO L226 Difference]: Without dead ends: 21030 [2020-08-21 23:10:17,574 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 [2020-08-21 23:10:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-21 23:10:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-21 23:10:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-21 23:10:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-21 23:10:18,078 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-21 23:10:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:10:18,078 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-21 23:10:18,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:10:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-21 23:10:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 23:10:18,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:10:18,088 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] [2020-08-21 23:10:18,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:10:18,089 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:10:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:10:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-21 23:10:18,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:10:18,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227575290] [2020-08-21 23:10:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:10:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:18,461 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:10:18,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:10:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:10:18,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227575290] [2020-08-21 23:10:18,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:10:18,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:10:18,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479460744] [2020-08-21 23:10:18,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:10:18,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:10:18,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:10:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:10:18,513 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-21 23:10:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:10:21,754 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-21 23:10:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:10:21,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-21 23:10:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:10:21,784 INFO L225 Difference]: With dead ends: 30843 [2020-08-21 23:10:21,784 INFO L226 Difference]: Without dead ends: 20313 [2020-08-21 23:10:21,808 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 [2020-08-21 23:10:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-21 23:10:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-21 23:10:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-21 23:10:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-21 23:10:22,706 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-21 23:10:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:10:22,706 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-21 23:10:22,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:10:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-21 23:10:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 23:10:22,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:10:22,720 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] [2020-08-21 23:10:22,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:10:22,720 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:10:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:10:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-21 23:10:22,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:10:22,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920093154] [2020-08-21 23:10:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:10:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:23,080 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-21 23:10:23,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:10:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:10:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:10:23,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920093154] [2020-08-21 23:10:23,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:10:23,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:10:23,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402052167] [2020-08-21 23:10:23,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:10:23,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:10:23,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:10:23,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:10:23,130 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states.