/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:36:03,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:36:03,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:36:03,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:36:03,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:36:03,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:36:03,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:36:03,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:36:03,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:36:03,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:36:03,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:36:03,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:36:03,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:36:03,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:36:03,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:36:03,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:36:03,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:36:03,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:36:03,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:36:03,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:36:03,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:36:03,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:36:03,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:36:03,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:36:03,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:36:03,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:36:03,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:36:03,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:36:03,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:36:03,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:36:03,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:36:03,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:36:03,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:36:03,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:36:03,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:36:03,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:36:03,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:36:03,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:36:03,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:36:03,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:36:03,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:36:03,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 19:36:03,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:36:03,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:36:03,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:36:03,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:36:03,500 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:36:03,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:36:03,501 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:36:03,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:36:03,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:36:03,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:36:03,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:36:03,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:36:03,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:36:03,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:36:03,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:36:03,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:36:03,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:36:03,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:36:03,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:36:03,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:36:03,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:36:03,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:36:03,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:36:03,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:36:03,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:36:03,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:36:03,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:36:03,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:36:03,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:36:03,507 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:36:03,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:36:03,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:36:03,953 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:36:03,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:36:03,956 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:36:03,957 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 19:36:04,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20211d2b6/865fb19c86754335b879cd1aaf35db93/FLAG07153ae28 [2020-09-24 19:36:04,712 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:36:04,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 19:36:04,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20211d2b6/865fb19c86754335b879cd1aaf35db93/FLAG07153ae28 [2020-09-24 19:36:04,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20211d2b6/865fb19c86754335b879cd1aaf35db93 [2020-09-24 19:36:04,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:36:04,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:36:04,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:36:04,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:36:04,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:36:04,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:36:04" (1/1) ... [2020-09-24 19:36:04,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446b24d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:04, skipping insertion in model container [2020-09-24 19:36:04,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:36:04" (1/1) ... [2020-09-24 19:36:04,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:36:05,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:36:05,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:36:05,780 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:36:06,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:36:06,244 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:36:06,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06 WrapperNode [2020-09-24 19:36:06,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:36:06,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:36:06,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:36:06,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:36:06,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... [2020-09-24 19:36:06,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... [2020-09-24 19:36:06,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... [2020-09-24 19:36:06,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... [2020-09-24 19:36:06,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... [2020-09-24 19:36:06,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... [2020-09-24 19:36:06,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... [2020-09-24 19:36:06,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:36:06,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:36:06,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:36:06,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:36:06,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:36:06,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:36:06,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:36:06,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:36:06,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:36:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:36:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 19:36:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 19:36:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 19:36:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:36:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:36:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 19:36:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 19:36:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 19:36:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 19:36:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 19:36:06,549 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 19:36:06,549 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 19:36:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:36:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:36:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:36:08,403 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:36:08,404 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:36:08,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:36:08 BoogieIcfgContainer [2020-09-24 19:36:08,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:36:08,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:36:08,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:36:08,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:36:08,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:36:04" (1/3) ... [2020-09-24 19:36:08,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8baed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:36:08, skipping insertion in model container [2020-09-24 19:36:08,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:06" (2/3) ... [2020-09-24 19:36:08,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8baed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:36:08, skipping insertion in model container [2020-09-24 19:36:08,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:36:08" (3/3) ... [2020-09-24 19:36:08,435 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-24 19:36:08,449 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:36:08,463 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-24 19:36:08,483 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-24 19:36:08,516 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:36:08,516 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:36:08,516 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:36:08,516 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:36:08,516 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:36:08,517 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:36:08,517 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:36:08,517 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:36:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states. [2020-09-24 19:36:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-24 19:36:08,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:08,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:36:08,598 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times [2020-09-24 19:36:08,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:08,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469929214] [2020-09-24 19:36:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:09,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:10,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:10,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:10,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-24 19:36:10,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:36:10,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-09-24 19:36:10,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:36:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-09-24 19:36:10,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-24 19:36:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:36:10,893 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 19:36:10,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:10,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:10,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:10,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:36:10,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:10,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 19:36:10,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:10,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:10,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:36:11,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469929214] [2020-09-24 19:36:11,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:11,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:36:11,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024959399] [2020-09-24 19:36:11,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:36:11,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:36:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:36:11,333 INFO L87 Difference]: Start difference. First operand 1127 states. Second operand 4 states. [2020-09-24 19:36:15,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:15,840 INFO L93 Difference]: Finished difference Result 1833 states and 2360 transitions. [2020-09-24 19:36:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:36:15,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2020-09-24 19:36:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:15,873 INFO L225 Difference]: With dead ends: 1833 [2020-09-24 19:36:15,874 INFO L226 Difference]: Without dead ends: 1303 [2020-09-24 19:36:15,881 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 [2020-09-24 19:36:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-09-24 19:36:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296. [2020-09-24 19:36:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2020-09-24 19:36:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions. [2020-09-24 19:36:16,017 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423 [2020-09-24 19:36:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:16,019 INFO L479 AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions. [2020-09-24 19:36:16,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:36:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions. [2020-09-24 19:36:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-09-24 19:36:16,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:16,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:36:16,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:36:16,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times [2020-09-24 19:36:16,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:16,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169939972] [2020-09-24 19:36:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:16,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:16,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:17,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:17,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:17,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:17,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-09-24 19:36:17,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:36:17,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-09-24 19:36:17,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:17,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:36:17,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-24 19:36:17,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 19:36:17,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:17,638 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 19:36:17,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:17,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:17,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:36:17,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:17,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 19:36:17,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:17,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:17,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:17,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:17,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:36:17,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169939972] [2020-09-24 19:36:17,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:17,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:36:17,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212373884] [2020-09-24 19:36:17,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:36:17,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:36:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:36:17,952 INFO L87 Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states. [2020-09-24 19:36:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:24,569 INFO L93 Difference]: Finished difference Result 3342 states and 4030 transitions. [2020-09-24 19:36:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:36:24,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2020-09-24 19:36:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:24,582 INFO L225 Difference]: With dead ends: 3342 [2020-09-24 19:36:24,582 INFO L226 Difference]: Without dead ends: 2345 [2020-09-24 19:36:24,585 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 [2020-09-24 19:36:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2020-09-24 19:36:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2223. [2020-09-24 19:36:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-09-24 19:36:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2684 transitions. [2020-09-24 19:36:24,673 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2684 transitions. Word has length 423 [2020-09-24 19:36:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:24,674 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 2684 transitions. [2020-09-24 19:36:24,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:36:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2684 transitions. [2020-09-24 19:36:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-09-24 19:36:24,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:24,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:36:24,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:36:24,681 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1954725097, now seen corresponding path program 1 times [2020-09-24 19:36:24,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:24,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597382965] [2020-09-24 19:36:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:24,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:25,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:25,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:25,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:25,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:25,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:25,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-09-24 19:36:25,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:36:25,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-24 19:36:25,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:36:25,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-09-24 19:36:25,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 19:36:25,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:26,085 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 19:36:26,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:26,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:26,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:36:26,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:26,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 19:36:26,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:26,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:36:26,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597382965] [2020-09-24 19:36:26,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:26,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:36:26,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803907666] [2020-09-24 19:36:26,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:36:26,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:36:26,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:36:26,285 INFO L87 Difference]: Start difference. First operand 2223 states and 2684 transitions. Second operand 4 states. [2020-09-24 19:36:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:32,773 INFO L93 Difference]: Finished difference Result 6203 states and 7536 transitions. [2020-09-24 19:36:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:36:32,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 424 [2020-09-24 19:36:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:32,792 INFO L225 Difference]: With dead ends: 6203 [2020-09-24 19:36:32,793 INFO L226 Difference]: Without dead ends: 4214 [2020-09-24 19:36:32,797 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 [2020-09-24 19:36:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2020-09-24 19:36:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 2227. [2020-09-24 19:36:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-09-24 19:36:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2688 transitions. [2020-09-24 19:36:32,886 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2688 transitions. Word has length 424 [2020-09-24 19:36:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:32,887 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2688 transitions. [2020-09-24 19:36:32,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:36:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2688 transitions. [2020-09-24 19:36:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-24 19:36:32,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:32,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:36:32,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:36:32,894 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:32,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:32,894 INFO L82 PathProgramCache]: Analyzing trace with hash 600735478, now seen corresponding path program 1 times [2020-09-24 19:36:32,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:32,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548653581] [2020-09-24 19:36:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:33,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:33,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:33,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:33,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:33,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:33,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:33,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-24 19:36:33,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:36:33,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-09-24 19:36:33,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:36:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-09-24 19:36:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-24 19:36:33,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:34,543 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 19:36:34,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:34,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:34,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:34,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:36:34,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 19:36:34,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:34,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 19:36:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:36:34,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548653581] [2020-09-24 19:36:34,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:34,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:36:34,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959629285] [2020-09-24 19:36:34,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:36:34,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:36:34,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:36:34,876 INFO L87 Difference]: Start difference. First operand 2227 states and 2688 transitions. Second operand 4 states. [2020-09-24 19:36:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:40,141 INFO L93 Difference]: Finished difference Result 5573 states and 6762 transitions. [2020-09-24 19:36:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:36:40,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 425 [2020-09-24 19:36:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:40,160 INFO L225 Difference]: With dead ends: 5573 [2020-09-24 19:36:40,160 INFO L226 Difference]: Without dead ends: 3718 [2020-09-24 19:36:40,165 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 [2020-09-24 19:36:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2020-09-24 19:36:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3596. [2020-09-24 19:36:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3596 states. [2020-09-24 19:36:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 4348 transitions. [2020-09-24 19:36:40,311 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 4348 transitions. Word has length 425 [2020-09-24 19:36:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:40,312 INFO L479 AbstractCegarLoop]: Abstraction has 3596 states and 4348 transitions. [2020-09-24 19:36:40,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:36:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 4348 transitions. [2020-09-24 19:36:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-09-24 19:36:40,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:40,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:36:40,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:36:40,321 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 802127734, now seen corresponding path program 1 times [2020-09-24 19:36:40,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:40,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255475600] [2020-09-24 19:36:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:40,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:40,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:40,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:41,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:41,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:41,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:41,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:41,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:41,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-09-24 19:36:41,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:36:41,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-09-24 19:36:41,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:41,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:36:41,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-24 19:36:41,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 19:36:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:41,926 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 19:36:41,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:41,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:41,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:41,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:36:41,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:41,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 19:36:41,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:41,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:41,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:41,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:41,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:36:42,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255475600] [2020-09-24 19:36:42,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:42,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:36:42,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219562762] [2020-09-24 19:36:42,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:36:42,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:36:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:36:42,356 INFO L87 Difference]: Start difference. First operand 3596 states and 4348 transitions. Second operand 5 states. [2020-09-24 19:36:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:48,855 INFO L93 Difference]: Finished difference Result 9837 states and 11944 transitions. [2020-09-24 19:36:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:36:48,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 425 [2020-09-24 19:36:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:48,880 INFO L225 Difference]: With dead ends: 9837 [2020-09-24 19:36:48,880 INFO L226 Difference]: Without dead ends: 6774 [2020-09-24 19:36:48,887 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 [2020-09-24 19:36:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6774 states. [2020-09-24 19:36:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6774 to 6666. [2020-09-24 19:36:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-09-24 19:36:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 8055 transitions. [2020-09-24 19:36:49,111 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 8055 transitions. Word has length 425 [2020-09-24 19:36:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:49,112 INFO L479 AbstractCegarLoop]: Abstraction has 6666 states and 8055 transitions. [2020-09-24 19:36:49,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:36:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 8055 transitions. [2020-09-24 19:36:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-09-24 19:36:49,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:49,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:36:49,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:36:49,124 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -529369502, now seen corresponding path program 1 times [2020-09-24 19:36:49,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:49,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460343549] [2020-09-24 19:36:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:49,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:49,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:49,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:50,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:50,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:50,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 433 [2020-09-24 19:36:50,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:36:50,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-24 19:36:50,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:50,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:36:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 182 [2020-09-24 19:36:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 19:36:50,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:50,575 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 19:36:50,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:50,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:50,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:50,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 19:36:50,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:50,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 19:36:50,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:50,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:36:50,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460343549] [2020-09-24 19:36:50,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:50,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:36:50,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360426596] [2020-09-24 19:36:50,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:36:50,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:36:50,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:36:50,763 INFO L87 Difference]: Start difference. First operand 6666 states and 8055 transitions. Second operand 4 states. [2020-09-24 19:36:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:56,657 INFO L93 Difference]: Finished difference Result 19553 states and 23679 transitions. [2020-09-24 19:36:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:36:56,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 426 [2020-09-24 19:36:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:56,711 INFO L225 Difference]: With dead ends: 19553 [2020-09-24 19:36:56,712 INFO L226 Difference]: Without dead ends: 13119 [2020-09-24 19:36:56,725 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 [2020-09-24 19:36:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2020-09-24 19:36:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 6672. [2020-09-24 19:36:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6672 states. [2020-09-24 19:36:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6672 states to 6672 states and 8063 transitions. [2020-09-24 19:36:57,054 INFO L78 Accepts]: Start accepts. Automaton has 6672 states and 8063 transitions. Word has length 426 [2020-09-24 19:36:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:57,054 INFO L479 AbstractCegarLoop]: Abstraction has 6672 states and 8063 transitions. [2020-09-24 19:36:57,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:36:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6672 states and 8063 transitions. [2020-09-24 19:36:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-09-24 19:36:57,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:57,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:36:57,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:36:57,067 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:57,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1952874272, now seen corresponding path program 1 times [2020-09-24 19:36:57,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:57,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120553872] [2020-09-24 19:36:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY