/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 SequenceOfStatements --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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:27:34,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:27:34,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:27:34,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:27:34,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:27:34,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:27:34,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:27:34,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:27:34,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:27:34,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:27:34,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:27:34,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:27:34,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:27:34,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:27:34,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:27:34,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:27:34,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:27:34,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:27:34,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:27:34,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:27:34,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:27:34,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:27:34,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:27:34,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:27:34,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:27:34,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:27:34,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:27:34,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:27:34,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:27:34,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:27:34,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:27:34,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:27:34,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:27:34,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:27:34,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:27:34,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:27:34,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:27:34,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:27:34,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:27:34,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:27:34,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:27:34,675 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 [2020-10-12 19:27:34,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:27:34,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:27:34,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:27:34,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:27:34,720 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:27:34,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:27:34,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:27:34,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:27:34,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:27:34,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:27:34,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:27:34,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:27:34,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:27:34,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:27:34,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:27:34,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:27:34,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:27:34,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:27:34,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:27:34,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:27:34,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:27:34,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:27:34,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:27:34,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:27:34,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:27:34,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:27:34,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:27:34,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:27:34,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:27:34,726 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 -> SequenceOfStatements 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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:27:35,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:27:35,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:27:35,084 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:27:35,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:27:35,088 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:27:35,088 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:27:35,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3cd1301b/2ea7edfe462e495c88fff182c88ed9e6/FLAGcc4fe69ee [2020-10-12 19:27:35,681 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:27:35,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:27:35,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3cd1301b/2ea7edfe462e495c88fff182c88ed9e6/FLAGcc4fe69ee [2020-10-12 19:27:36,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3cd1301b/2ea7edfe462e495c88fff182c88ed9e6 [2020-10-12 19:27:36,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:27:36,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:27:36,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:27:36,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:27:36,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:27:36,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187bf361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36, skipping insertion in model container [2020-10-12 19:27:36,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:27:36,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:27:36,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:27:36,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:27:36,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:27:36,477 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:27:36,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36 WrapperNode [2020-10-12 19:27:36,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:27:36,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:27:36,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:27:36,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:27:36,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (1/1) ... [2020-10-12 19:27:36,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:27:36,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:27:36,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:27:36,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:27:36,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (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 [2020-10-12 19:27:36,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:27:36,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:27:36,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:27:36,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:27:36,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:27:36,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:27:36,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:27:36,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:27:36,581 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:27:36,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:27:36,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:27:36,581 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:27:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:27:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:27:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:27:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:27:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:27:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:27:36,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:27:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:27:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:27:37,063 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:27:37,064 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:27:37,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:27:37 BoogieIcfgContainer [2020-10-12 19:27:37,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:27:37,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:27:37,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:27:37,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:27:37,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:27:36" (1/3) ... [2020-10-12 19:27:37,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6896b823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:27:37, skipping insertion in model container [2020-10-12 19:27:37,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:27:36" (2/3) ... [2020-10-12 19:27:37,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6896b823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:27:37, skipping insertion in model container [2020-10-12 19:27:37,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:27:37" (3/3) ... [2020-10-12 19:27:37,078 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:27:37,089 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:27:37,097 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:27:37,112 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:27:37,135 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:27:37,136 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:27:37,136 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:27:37,136 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:27:37,136 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:27:37,137 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:27:37,137 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:27:37,137 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:27:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-10-12 19:27:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 19:27:37,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:37,163 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] [2020-10-12 19:27:37,163 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1464413452, now seen corresponding path program 1 times [2020-10-12 19:27:37,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:37,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185935886] [2020-10-12 19:27:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:37,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:37,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:37,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:38,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:39,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:39,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 19:27:39,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:27:39,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2394 [2020-10-12 19:27:39,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:39,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:27:39,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:27:39,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:27:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 19:27:40,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:40,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:40,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:40,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:40,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:40,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 19:27:40,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:40,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:27:40,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:27:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:40,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185935886] [2020-10-12 19:27:40,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:40,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:27:40,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109516880] [2020-10-12 19:27:40,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:27:40,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:27:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:27:40,134 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 6 states. [2020-10-12 19:27:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:40,894 INFO L93 Difference]: Finished difference Result 164 states and 251 transitions. [2020-10-12 19:27:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:27:40,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-12 19:27:40,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:40,919 INFO L225 Difference]: With dead ends: 164 [2020-10-12 19:27:40,921 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 19:27:40,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:27:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 19:27:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-10-12 19:27:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 19:27:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 151 transitions. [2020-10-12 19:27:41,022 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 151 transitions. Word has length 41 [2020-10-12 19:27:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:41,023 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 151 transitions. [2020-10-12 19:27:41,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:27:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 151 transitions. [2020-10-12 19:27:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 19:27:41,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:41,027 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] [2020-10-12 19:27:41,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:27:41,028 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:41,029 INFO L82 PathProgramCache]: Analyzing trace with hash -598881063, now seen corresponding path program 1 times [2020-10-12 19:27:41,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:41,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138174273] [2020-10-12 19:27:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:41,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:41,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:41,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 19:27:41,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:27:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-12 19:27:41,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:41,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:27:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:27:41,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:27:41,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 19:27:41,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:41,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:41,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:41,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:41,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:41,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:27:41,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:27:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:27:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:41,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138174273] [2020-10-12 19:27:41,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:41,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:27:41,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819419892] [2020-10-12 19:27:41,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:27:41,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:27:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:27:41,808 INFO L87 Difference]: Start difference. First operand 104 states and 151 transitions. Second operand 6 states. [2020-10-12 19:27:41,959 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-12 19:27:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:42,322 INFO L93 Difference]: Finished difference Result 590 states and 919 transitions. [2020-10-12 19:27:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:27:42,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-12 19:27:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:42,330 INFO L225 Difference]: With dead ends: 590 [2020-10-12 19:27:42,330 INFO L226 Difference]: Without dead ends: 509 [2020-10-12 19:27:42,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:27:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-10-12 19:27:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 183. [2020-10-12 19:27:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 19:27:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 274 transitions. [2020-10-12 19:27:42,393 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 274 transitions. Word has length 41 [2020-10-12 19:27:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:42,393 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 274 transitions. [2020-10-12 19:27:42,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:27:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 274 transitions. [2020-10-12 19:27:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:27:42,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:42,402 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] [2020-10-12 19:27:42,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:27:42,404 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1169603652, now seen corresponding path program 1 times [2020-10-12 19:27:42,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:42,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527968103] [2020-10-12 19:27:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:42,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:42,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:42,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:43,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:43,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:27:43,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:27:43,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1454 [2020-10-12 19:27:43,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:27:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:27:43,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:27:43,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:44,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:44,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:44,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:44,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:44,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:44,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:27:44,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:44,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:44,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:44,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:27:44,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:44,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527968103] [2020-10-12 19:27:44,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:44,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:27:44,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290124933] [2020-10-12 19:27:44,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:27:44,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:44,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:27:44,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:27:44,118 INFO L87 Difference]: Start difference. First operand 183 states and 274 transitions. Second operand 7 states. [2020-10-12 19:27:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:44,569 INFO L93 Difference]: Finished difference Result 550 states and 841 transitions. [2020-10-12 19:27:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:27:44,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-12 19:27:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:44,574 INFO L225 Difference]: With dead ends: 550 [2020-10-12 19:27:44,575 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 19:27:44,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:27:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 19:27:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 206. [2020-10-12 19:27:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-12 19:27:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 306 transitions. [2020-10-12 19:27:44,599 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 306 transitions. Word has length 43 [2020-10-12 19:27:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:44,600 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 306 transitions. [2020-10-12 19:27:44,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:27:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 306 transitions. [2020-10-12 19:27:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:27:44,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:44,601 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] [2020-10-12 19:27:44,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:27:44,602 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:44,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1193348874, now seen corresponding path program 1 times [2020-10-12 19:27:44,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:44,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502352153] [2020-10-12 19:27:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:44,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:44,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:44,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:45,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:45,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:45,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:27:45,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:27:45,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1149 [2020-10-12 19:27:45,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:45,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:27:45,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:27:45,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 19:27:45,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:27:45,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:45,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:45,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:45,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:45,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:27:45,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:45,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:27:45,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:27:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:46,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502352153] [2020-10-12 19:27:46,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:46,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:27:46,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266521337] [2020-10-12 19:27:46,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:27:46,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:27:46,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:27:46,008 INFO L87 Difference]: Start difference. First operand 206 states and 306 transitions. Second operand 7 states. [2020-10-12 19:27:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:46,447 INFO L93 Difference]: Finished difference Result 534 states and 810 transitions. [2020-10-12 19:27:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:27:46,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-12 19:27:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:46,450 INFO L225 Difference]: With dead ends: 534 [2020-10-12 19:27:46,450 INFO L226 Difference]: Without dead ends: 374 [2020-10-12 19:27:46,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:27:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-12 19:27:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 230. [2020-10-12 19:27:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-12 19:27:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 339 transitions. [2020-10-12 19:27:46,494 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 339 transitions. Word has length 43 [2020-10-12 19:27:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:46,497 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 339 transitions. [2020-10-12 19:27:46,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:27:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 339 transitions. [2020-10-12 19:27:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:27:46,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:46,498 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] [2020-10-12 19:27:46,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:27:46,499 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash -872228301, now seen corresponding path program 1 times [2020-10-12 19:27:46,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:46,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786351991] [2020-10-12 19:27:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:46,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:46,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:46,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:27:46,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:27:46,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-12 19:27:46,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:46,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:27:46,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:27:46,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 19:27:46,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:47,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:47,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:47,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:47,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:47,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:47,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:27:47,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:47,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:27:47,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:27:47,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:47,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786351991] [2020-10-12 19:27:47,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:47,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:27:47,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19331407] [2020-10-12 19:27:47,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:27:47,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:47,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:27:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:27:47,177 INFO L87 Difference]: Start difference. First operand 230 states and 339 transitions. Second operand 6 states. [2020-10-12 19:27:47,335 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 19:27:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:47,744 INFO L93 Difference]: Finished difference Result 716 states and 1095 transitions. [2020-10-12 19:27:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:27:47,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-12 19:27:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:47,748 INFO L225 Difference]: With dead ends: 716 [2020-10-12 19:27:47,749 INFO L226 Difference]: Without dead ends: 556 [2020-10-12 19:27:47,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:27:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-12 19:27:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 230. [2020-10-12 19:27:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-12 19:27:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 337 transitions. [2020-10-12 19:27:47,786 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 337 transitions. Word has length 43 [2020-10-12 19:27:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:47,786 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 337 transitions. [2020-10-12 19:27:47,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:27:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 337 transitions. [2020-10-12 19:27:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:27:47,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:47,787 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] [2020-10-12 19:27:47,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:27:47,788 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -892277644, now seen corresponding path program 1 times [2020-10-12 19:27:47,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:47,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526183612] [2020-10-12 19:27:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:47,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:47,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:48,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:48,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:48,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:27:48,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:27:48,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-12 19:27:48,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:48,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:27:48,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 19:27:48,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:27:48,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:27:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:48,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:48,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:48,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:48,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:27:48,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:27:48,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:48,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:27:48,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:48,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526183612] [2020-10-12 19:27:48,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:48,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:27:48,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793855862] [2020-10-12 19:27:48,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:27:48,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:48,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:27:48,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:27:48,487 INFO L87 Difference]: Start difference. First operand 230 states and 337 transitions. Second operand 5 states. [2020-10-12 19:27:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:48,966 INFO L93 Difference]: Finished difference Result 398 states and 594 transitions. [2020-10-12 19:27:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:27:48,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-12 19:27:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:48,970 INFO L225 Difference]: With dead ends: 398 [2020-10-12 19:27:48,970 INFO L226 Difference]: Without dead ends: 396 [2020-10-12 19:27:48,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:27:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-12 19:27:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 238. [2020-10-12 19:27:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 19:27:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 345 transitions. [2020-10-12 19:27:49,023 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 345 transitions. Word has length 43 [2020-10-12 19:27:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:49,024 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 345 transitions. [2020-10-12 19:27:49,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:27:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 345 transitions. [2020-10-12 19:27:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:27:49,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:49,026 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] [2020-10-12 19:27:49,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:27:49,026 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash 715061754, now seen corresponding path program 1 times [2020-10-12 19:27:49,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:49,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907935327] [2020-10-12 19:27:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:49,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:49,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:49,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:49,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:50,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:54,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:54,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:27:54,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:27:54,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:27:54,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:27:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:27:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:27:54,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:27:54,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:54,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:54,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:27:54,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:27:54,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:54,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907935327] [2020-10-12 19:27:54,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:54,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:27:54,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427155164] [2020-10-12 19:27:54,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:27:54,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:54,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:27:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:27:54,189 INFO L87 Difference]: Start difference. First operand 238 states and 345 transitions. Second operand 7 states. [2020-10-12 19:27:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:54,666 INFO L93 Difference]: Finished difference Result 570 states and 853 transitions. [2020-10-12 19:27:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:27:54,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-12 19:27:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:54,670 INFO L225 Difference]: With dead ends: 570 [2020-10-12 19:27:54,670 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 19:27:54,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:27:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 19:27:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 226. [2020-10-12 19:27:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-12 19:27:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 328 transitions. [2020-10-12 19:27:54,723 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 328 transitions. Word has length 44 [2020-10-12 19:27:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:54,723 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 328 transitions. [2020-10-12 19:27:54,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:27:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 328 transitions. [2020-10-12 19:27:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:27:54,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:54,724 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] [2020-10-12 19:27:54,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:27:54,725 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1881183488, now seen corresponding path program 1 times [2020-10-12 19:27:54,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:54,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141751905] [2020-10-12 19:27:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:54,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:54,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:54,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:54,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:54,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:27:54,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:27:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-12 19:27:54,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 19:27:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 19:27:54,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:55,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:55,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:55,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:55,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:55,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:27:55,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:55,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:27:55,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:55,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:27:55,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:55,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141751905] [2020-10-12 19:27:55,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:55,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:27:55,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023492466] [2020-10-12 19:27:55,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:27:55,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:27:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:27:55,108 INFO L87 Difference]: Start difference. First operand 226 states and 328 transitions. Second operand 4 states. [2020-10-12 19:27:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:55,458 INFO L93 Difference]: Finished difference Result 536 states and 798 transitions. [2020-10-12 19:27:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:27:55,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-12 19:27:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:55,462 INFO L225 Difference]: With dead ends: 536 [2020-10-12 19:27:55,462 INFO L226 Difference]: Without dead ends: 358 [2020-10-12 19:27:55,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:27:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-12 19:27:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2020-10-12 19:27:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-12 19:27:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 522 transitions. [2020-10-12 19:27:55,511 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 522 transitions. Word has length 44 [2020-10-12 19:27:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:55,511 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 522 transitions. [2020-10-12 19:27:55,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:27:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 522 transitions. [2020-10-12 19:27:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:27:55,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:55,512 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] [2020-10-12 19:27:55,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:27:55,513 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 557188954, now seen corresponding path program 1 times [2020-10-12 19:27:55,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:55,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557891205] [2020-10-12 19:27:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:55,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:55,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:55,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:55,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:55,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:27:55,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:27:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-12 19:27:55,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 19:27:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 19:27:55,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:55,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:55,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:55,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:55,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:55,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:27:55,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:27:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:55,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:27:55,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:55,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557891205] [2020-10-12 19:27:55,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:55,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:27:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281181409] [2020-10-12 19:27:55,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:27:55,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:27:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:27:55,827 INFO L87 Difference]: Start difference. First operand 356 states and 522 transitions. Second operand 4 states. [2020-10-12 19:27:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:56,227 INFO L93 Difference]: Finished difference Result 896 states and 1332 transitions. [2020-10-12 19:27:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:27:56,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-12 19:27:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:56,236 INFO L225 Difference]: With dead ends: 896 [2020-10-12 19:27:56,236 INFO L226 Difference]: Without dead ends: 592 [2020-10-12 19:27:56,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:27:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-12 19:27:56,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 568. [2020-10-12 19:27:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-10-12 19:27:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 835 transitions. [2020-10-12 19:27:56,354 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 835 transitions. Word has length 45 [2020-10-12 19:27:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:56,355 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 835 transitions. [2020-10-12 19:27:56,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:27:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 835 transitions. [2020-10-12 19:27:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 19:27:56,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:56,357 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] [2020-10-12 19:27:56,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:27:56,357 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash 194903052, now seen corresponding path program 1 times [2020-10-12 19:27:56,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:56,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102586410] [2020-10-12 19:27:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:56,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:56,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 19:27:56,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:27:56,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-12 19:27:56,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:56,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:27:56,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:27:56,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 19:27:56,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:56,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:56,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:56,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:56,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:56,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:27:56,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:56,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:56,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:56,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:27:56,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:56,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102586410] [2020-10-12 19:27:56,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:56,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:27:56,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584457814] [2020-10-12 19:27:56,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:27:56,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:56,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:27:56,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:27:56,740 INFO L87 Difference]: Start difference. First operand 568 states and 835 transitions. Second operand 6 states. [2020-10-12 19:27:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:57,170 INFO L93 Difference]: Finished difference Result 1106 states and 1636 transitions. [2020-10-12 19:27:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:27:57,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-12 19:27:57,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:57,179 INFO L225 Difference]: With dead ends: 1106 [2020-10-12 19:27:57,179 INFO L226 Difference]: Without dead ends: 568 [2020-10-12 19:27:57,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:27:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-12 19:27:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2020-10-12 19:27:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-10-12 19:27:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 827 transitions. [2020-10-12 19:27:57,242 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 827 transitions. Word has length 46 [2020-10-12 19:27:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:57,242 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 827 transitions. [2020-10-12 19:27:57,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:27:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 827 transitions. [2020-10-12 19:27:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 19:27:57,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:57,243 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] [2020-10-12 19:27:57,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:27:57,244 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash -334387449, now seen corresponding path program 1 times [2020-10-12 19:27:57,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:57,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426162774] [2020-10-12 19:27:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:57,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:57,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:57,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 19:27:57,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:27:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 19:27:57,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:27:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:27:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:27:57,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:57,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:57,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:57,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:57,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:57,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:27:57,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:27:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:27:57,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:57,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426162774] [2020-10-12 19:27:57,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:57,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:27:57,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328333225] [2020-10-12 19:27:57,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:27:57,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:57,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:27:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:27:57,475 INFO L87 Difference]: Start difference. First operand 568 states and 827 transitions. Second operand 4 states. [2020-10-12 19:27:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:57,894 INFO L93 Difference]: Finished difference Result 1324 states and 1931 transitions. [2020-10-12 19:27:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:27:57,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-12 19:27:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:57,899 INFO L225 Difference]: With dead ends: 1324 [2020-10-12 19:27:57,900 INFO L226 Difference]: Without dead ends: 782 [2020-10-12 19:27:57,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:27:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-10-12 19:27:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 772. [2020-10-12 19:27:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2020-10-12 19:27:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1102 transitions. [2020-10-12 19:27:58,004 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1102 transitions. Word has length 46 [2020-10-12 19:27:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:58,005 INFO L479 AbstractCegarLoop]: Abstraction has 772 states and 1102 transitions. [2020-10-12 19:27:58,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:27:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1102 transitions. [2020-10-12 19:27:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 19:27:58,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:58,006 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] [2020-10-12 19:27:58,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:27:58,007 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:58,007 INFO L82 PathProgramCache]: Analyzing trace with hash -315317978, now seen corresponding path program 1 times [2020-10-12 19:27:58,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:58,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735870359] [2020-10-12 19:27:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:58,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:58,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:58,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:58,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 19:27:58,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:27:58,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-12 19:27:58,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:27:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:27:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:27:58,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:58,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:27:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:58,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:58,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:27:58,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:27:58,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:27:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:27:58,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:27:58,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:27:58,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:27:58,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:27:58,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:27:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:27:58,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735870359] [2020-10-12 19:27:58,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:27:58,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:27:58,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109535334] [2020-10-12 19:27:58,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:27:58,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:27:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:27:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:27:58,426 INFO L87 Difference]: Start difference. First operand 772 states and 1102 transitions. Second operand 5 states. [2020-10-12 19:27:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:27:58,997 INFO L93 Difference]: Finished difference Result 1778 states and 2569 transitions. [2020-10-12 19:27:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:27:58,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-12 19:27:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:27:59,005 INFO L225 Difference]: With dead ends: 1778 [2020-10-12 19:27:59,005 INFO L226 Difference]: Without dead ends: 1240 [2020-10-12 19:27:59,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:27:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-10-12 19:27:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1220. [2020-10-12 19:27:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1220 states. [2020-10-12 19:27:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1718 transitions. [2020-10-12 19:27:59,157 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1718 transitions. Word has length 47 [2020-10-12 19:27:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:27:59,158 INFO L479 AbstractCegarLoop]: Abstraction has 1220 states and 1718 transitions. [2020-10-12 19:27:59,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:27:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1718 transitions. [2020-10-12 19:27:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:27:59,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:27:59,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:27:59,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:27:59,161 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:27:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:27:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1077276216, now seen corresponding path program 1 times [2020-10-12 19:27:59,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:27:59,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879182334] [2020-10-12 19:27:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:27:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:27:59,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:59,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:59,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:59,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:59,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:27:59,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:00,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:00,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:00,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:00,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:02,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:04,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:04,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:28:04,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:28:04,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:28:04,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 19:28:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:28:04,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:04,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:04,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:04,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:04,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:28:04,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:04,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:04,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:04,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:28:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:04,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879182334] [2020-10-12 19:28:04,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:04,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 19:28:04,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319019567] [2020-10-12 19:28:04,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 19:28:04,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:04,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 19:28:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:28:04,787 INFO L87 Difference]: Start difference. First operand 1220 states and 1718 transitions. Second operand 16 states. [2020-10-12 19:28:05,133 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2020-10-12 19:28:05,835 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-12 19:28:05,973 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-12 19:28:06,112 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 19:28:07,458 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-12 19:28:07,856 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-12 19:28:08,007 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 19:28:09,740 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-12 19:28:11,169 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 19:28:11,576 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 19:28:11,786 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-12 19:28:12,223 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-12 19:28:12,510 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-12 19:28:12,929 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-12 19:28:13,082 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 19:28:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:15,006 INFO L93 Difference]: Finished difference Result 10054 states and 13911 transitions. [2020-10-12 19:28:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 19:28:15,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-12 19:28:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:15,047 INFO L225 Difference]: With dead ends: 10054 [2020-10-12 19:28:15,047 INFO L226 Difference]: Without dead ends: 8864 [2020-10-12 19:28:15,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1566, Invalid=6990, Unknown=0, NotChecked=0, Total=8556 [2020-10-12 19:28:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8864 states. [2020-10-12 19:28:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8864 to 2296. [2020-10-12 19:28:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2296 states. [2020-10-12 19:28:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 3230 transitions. [2020-10-12 19:28:15,487 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 3230 transitions. Word has length 65 [2020-10-12 19:28:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:15,487 INFO L479 AbstractCegarLoop]: Abstraction has 2296 states and 3230 transitions. [2020-10-12 19:28:15,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 19:28:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 3230 transitions. [2020-10-12 19:28:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:28:15,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:15,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:15,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:28:15,493 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1053530994, now seen corresponding path program 1 times [2020-10-12 19:28:15,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:15,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059279130] [2020-10-12 19:28:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:15,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:15,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:16,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:16,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:20,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:20,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:28:20,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:28:20,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:28:20,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:20,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:28:20,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:20,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:28:20,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:20,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:20,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:20,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:20,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:20,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:20,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:28:20,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:20,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:20,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:20,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059279130] [2020-10-12 19:28:20,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:20,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:28:20,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220279072] [2020-10-12 19:28:20,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:28:20,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:28:20,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:28:20,809 INFO L87 Difference]: Start difference. First operand 2296 states and 3230 transitions. Second operand 11 states. [2020-10-12 19:28:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:23,494 INFO L93 Difference]: Finished difference Result 12272 states and 17171 transitions. [2020-10-12 19:28:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 19:28:23,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-12 19:28:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:23,531 INFO L225 Difference]: With dead ends: 12272 [2020-10-12 19:28:23,531 INFO L226 Difference]: Without dead ends: 10006 [2020-10-12 19:28:23,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 19:28:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2020-10-12 19:28:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 3668. [2020-10-12 19:28:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3668 states. [2020-10-12 19:28:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5108 transitions. [2020-10-12 19:28:24,267 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5108 transitions. Word has length 65 [2020-10-12 19:28:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:24,268 INFO L479 AbstractCegarLoop]: Abstraction has 3668 states and 5108 transitions. [2020-10-12 19:28:24,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:28:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5108 transitions. [2020-10-12 19:28:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:28:24,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:24,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:24,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:28:24,271 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:24,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1713838131, now seen corresponding path program 1 times [2020-10-12 19:28:24,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:24,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840740653] [2020-10-12 19:28:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:24,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:24,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:24,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:24,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:24,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:25,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:29,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:29,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:28:29,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:28:29,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:28:29,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 19:28:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:29,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:28:29,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:29,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:29,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:29,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:29,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:29,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:29,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:28:29,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:29,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:29,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:29,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:29,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840740653] [2020-10-12 19:28:29,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:29,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:28:29,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672506857] [2020-10-12 19:28:29,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 19:28:29,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:29,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 19:28:29,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:28:29,577 INFO L87 Difference]: Start difference. First operand 3668 states and 5108 transitions. Second operand 13 states. [2020-10-12 19:28:29,845 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2020-10-12 19:28:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:33,955 INFO L93 Difference]: Finished difference Result 14676 states and 20360 transitions. [2020-10-12 19:28:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:28:33,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-12 19:28:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:33,987 INFO L225 Difference]: With dead ends: 14676 [2020-10-12 19:28:33,987 INFO L226 Difference]: Without dead ends: 11038 [2020-10-12 19:28:33,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 19:28:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11038 states. [2020-10-12 19:28:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11038 to 4476. [2020-10-12 19:28:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4476 states. [2020-10-12 19:28:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 6196 transitions. [2020-10-12 19:28:34,775 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 6196 transitions. Word has length 65 [2020-10-12 19:28:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:34,775 INFO L479 AbstractCegarLoop]: Abstraction has 4476 states and 6196 transitions. [2020-10-12 19:28:34,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 19:28:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 6196 transitions. [2020-10-12 19:28:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:28:34,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:34,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:34,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:28:34,779 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:34,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1353069239, now seen corresponding path program 1 times [2020-10-12 19:28:34,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:34,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534486024] [2020-10-12 19:28:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:35,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:35,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:39,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:39,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:28:39,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:28:39,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:28:39,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:28:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:28:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:28:39,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:39,965 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2020-10-12 19:28:40,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:40,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:40,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:40,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:40,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:40,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:28:40,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:28:40,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:40,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:28:40,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:40,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534486024] [2020-10-12 19:28:40,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:40,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:28:40,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246033604] [2020-10-12 19:28:40,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:28:40,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:28:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:28:40,116 INFO L87 Difference]: Start difference. First operand 4476 states and 6196 transitions. Second operand 11 states. [2020-10-12 19:28:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:45,177 INFO L93 Difference]: Finished difference Result 18279 states and 25019 transitions. [2020-10-12 19:28:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 19:28:45,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-12 19:28:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:45,206 INFO L225 Difference]: With dead ends: 18279 [2020-10-12 19:28:45,206 INFO L226 Difference]: Without dead ends: 13833 [2020-10-12 19:28:45,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:28:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13833 states. [2020-10-12 19:28:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13833 to 7464. [2020-10-12 19:28:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7464 states. [2020-10-12 19:28:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 10380 transitions. [2020-10-12 19:28:46,380 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 10380 transitions. Word has length 66 [2020-10-12 19:28:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:46,380 INFO L479 AbstractCegarLoop]: Abstraction has 7464 states and 10380 transitions. [2020-10-12 19:28:46,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:28:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 10380 transitions. [2020-10-12 19:28:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:28:46,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:46,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:46,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:28:46,385 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1329324017, now seen corresponding path program 1 times [2020-10-12 19:28:46,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:46,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32312105] [2020-10-12 19:28:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:46,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:46,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:46,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:47,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:47,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:28:47,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:28:47,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-12 19:28:47,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:47,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:28:47,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:28:47,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:28:47,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:48,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:48,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:48,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:48,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:48,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:28:48,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:28:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:28:48,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:48,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32312105] [2020-10-12 19:28:48,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:48,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:28:48,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051806733] [2020-10-12 19:28:48,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:28:48,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:48,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:28:48,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:28:48,075 INFO L87 Difference]: Start difference. First operand 7464 states and 10380 transitions. Second operand 10 states. [2020-10-12 19:28:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:51,859 INFO L93 Difference]: Finished difference Result 20064 states and 27688 transitions. [2020-10-12 19:28:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:28:51,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-12 19:28:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:51,894 INFO L225 Difference]: With dead ends: 20064 [2020-10-12 19:28:51,894 INFO L226 Difference]: Without dead ends: 12630 [2020-10-12 19:28:51,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:28:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2020-10-12 19:28:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 7824. [2020-10-12 19:28:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7824 states. [2020-10-12 19:28:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 10910 transitions. [2020-10-12 19:28:53,363 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 10910 transitions. Word has length 66 [2020-10-12 19:28:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:28:53,364 INFO L479 AbstractCegarLoop]: Abstraction has 7824 states and 10910 transitions. [2020-10-12 19:28:53,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:28:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 10910 transitions. [2020-10-12 19:28:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:28:53,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:28:53,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:28:53,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:28:53,370 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:28:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:28:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1989631154, now seen corresponding path program 1 times [2020-10-12 19:28:53,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:28:53,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97390855] [2020-10-12 19:28:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:28:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:53,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:53,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:53,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:53,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:53,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:53,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:55,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:28:55,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:28:55,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2339 [2020-10-12 19:28:55,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:28:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:28:55,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:28:55,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:55,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:28:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:28:55,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:28:55,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:28:55,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:28:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:28:55,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97390855] [2020-10-12 19:28:55,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:28:55,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:28:55,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69066225] [2020-10-12 19:28:55,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:28:55,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:28:55,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:28:55,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:28:55,867 INFO L87 Difference]: Start difference. First operand 7824 states and 10910 transitions. Second operand 8 states. [2020-10-12 19:28:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:28:59,546 INFO L93 Difference]: Finished difference Result 22107 states and 31161 transitions. [2020-10-12 19:28:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:28:59,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:28:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:28:59,589 INFO L225 Difference]: With dead ends: 22107 [2020-10-12 19:28:59,590 INFO L226 Difference]: Without dead ends: 14313 [2020-10-12 19:28:59,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:28:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14313 states. [2020-10-12 19:29:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14313 to 8692. [2020-10-12 19:29:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8692 states. [2020-10-12 19:29:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8692 states to 8692 states and 12074 transitions. [2020-10-12 19:29:01,181 INFO L78 Accepts]: Start accepts. Automaton has 8692 states and 12074 transitions. Word has length 66 [2020-10-12 19:29:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:01,182 INFO L479 AbstractCegarLoop]: Abstraction has 8692 states and 12074 transitions. [2020-10-12 19:29:01,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:29:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8692 states and 12074 transitions. [2020-10-12 19:29:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:29:01,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:01,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:01,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:29:01,187 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1965885932, now seen corresponding path program 1 times [2020-10-12 19:29:01,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:01,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461586399] [2020-10-12 19:29:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:01,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:01,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:02,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:02,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:06,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:06,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:29:06,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:29:06,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:29:06,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:06,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:29:06,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:06,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:29:06,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:06,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:06,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:06,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:06,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:06,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:06,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:29:06,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:06,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:06,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:06,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:06,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:06,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461586399] [2020-10-12 19:29:06,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:06,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:29:06,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344047059] [2020-10-12 19:29:06,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:29:06,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:29:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:29:06,524 INFO L87 Difference]: Start difference. First operand 8692 states and 12074 transitions. Second operand 12 states. [2020-10-12 19:29:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:11,316 INFO L93 Difference]: Finished difference Result 21594 states and 29872 transitions. [2020-10-12 19:29:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 19:29:11,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-12 19:29:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:11,344 INFO L225 Difference]: With dead ends: 21594 [2020-10-12 19:29:11,344 INFO L226 Difference]: Without dead ends: 12932 [2020-10-12 19:29:11,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 19:29:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12932 states. [2020-10-12 19:29:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12932 to 8218. [2020-10-12 19:29:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8218 states. [2020-10-12 19:29:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8218 states to 8218 states and 11338 transitions. [2020-10-12 19:29:12,927 INFO L78 Accepts]: Start accepts. Automaton has 8218 states and 11338 transitions. Word has length 66 [2020-10-12 19:29:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:12,927 INFO L479 AbstractCegarLoop]: Abstraction has 8218 states and 11338 transitions. [2020-10-12 19:29:12,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:29:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8218 states and 11338 transitions. [2020-10-12 19:29:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:29:12,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:12,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:12,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:29:12,931 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1742197833, now seen corresponding path program 1 times [2020-10-12 19:29:12,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:12,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272765646] [2020-10-12 19:29:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:13,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:13,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:13,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:14,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:14,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:29:14,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:29:14,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1317 [2020-10-12 19:29:14,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:29:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:29:14,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:14,443 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-12 19:29:14,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:14,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:14,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:14,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:14,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:29:14,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:14,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:14,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:14,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272765646] [2020-10-12 19:29:14,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:14,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:29:14,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814369999] [2020-10-12 19:29:14,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:29:14,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:29:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:29:14,575 INFO L87 Difference]: Start difference. First operand 8218 states and 11338 transitions. Second operand 10 states. [2020-10-12 19:29:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:20,221 INFO L93 Difference]: Finished difference Result 28113 states and 38825 transitions. [2020-10-12 19:29:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 19:29:20,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-12 19:29:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:20,244 INFO L225 Difference]: With dead ends: 28113 [2020-10-12 19:29:20,245 INFO L226 Difference]: Without dead ends: 19925 [2020-10-12 19:29:20,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:29:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19925 states. [2020-10-12 19:29:21,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19925 to 8218. [2020-10-12 19:29:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8218 states. [2020-10-12 19:29:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8218 states to 8218 states and 11328 transitions. [2020-10-12 19:29:21,796 INFO L78 Accepts]: Start accepts. Automaton has 8218 states and 11328 transitions. Word has length 66 [2020-10-12 19:29:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:21,797 INFO L479 AbstractCegarLoop]: Abstraction has 8218 states and 11328 transitions. [2020-10-12 19:29:21,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:29:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 8218 states and 11328 transitions. [2020-10-12 19:29:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:29:21,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:21,800 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:21,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:29:21,800 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash -823995686, now seen corresponding path program 1 times [2020-10-12 19:29:21,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:21,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192227399] [2020-10-12 19:29:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:21,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:26,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:26,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:29:26,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:29:26,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:29:26,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:26,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:29:26,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:26,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:29:26,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:27,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:27,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:27,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:27,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:27,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:29:27,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:27,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:27,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192227399] [2020-10-12 19:29:27,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:27,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:29:27,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540822417] [2020-10-12 19:29:27,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:29:27,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:27,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:29:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:29:27,067 INFO L87 Difference]: Start difference. First operand 8218 states and 11328 transitions. Second operand 11 states. [2020-10-12 19:29:27,241 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 19:29:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:30,791 INFO L93 Difference]: Finished difference Result 17503 states and 23916 transitions. [2020-10-12 19:29:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 19:29:30,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-12 19:29:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:30,803 INFO L225 Difference]: With dead ends: 17503 [2020-10-12 19:29:30,803 INFO L226 Difference]: Without dead ends: 9315 [2020-10-12 19:29:30,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 19:29:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2020-10-12 19:29:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 5520. [2020-10-12 19:29:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5520 states. [2020-10-12 19:29:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 7514 transitions. [2020-10-12 19:29:31,998 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 7514 transitions. Word has length 67 [2020-10-12 19:29:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:31,998 INFO L479 AbstractCegarLoop]: Abstraction has 5520 states and 7514 transitions. [2020-10-12 19:29:31,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:29:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 7514 transitions. [2020-10-12 19:29:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:29:32,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:32,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:32,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:29:32,001 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1003959671, now seen corresponding path program 1 times [2020-10-12 19:29:32,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:32,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715424241] [2020-10-12 19:29:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:32,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:32,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:32,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:34,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:34,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:29:34,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:29:34,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2199 [2020-10-12 19:29:34,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:34,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:29:34,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:29:34,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:29:34,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:34,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:34,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:34,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:34,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:29:34,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:34,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:34,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715424241] [2020-10-12 19:29:34,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:34,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:29:34,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188860273] [2020-10-12 19:29:34,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:29:34,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:29:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:29:34,475 INFO L87 Difference]: Start difference. First operand 5520 states and 7514 transitions. Second operand 10 states. [2020-10-12 19:29:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:40,148 INFO L93 Difference]: Finished difference Result 25458 states and 34524 transitions. [2020-10-12 19:29:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 19:29:40,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-12 19:29:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:40,170 INFO L225 Difference]: With dead ends: 25458 [2020-10-12 19:29:40,171 INFO L226 Difference]: Without dead ends: 21884 [2020-10-12 19:29:40,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:29:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21884 states. [2020-10-12 19:29:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21884 to 12154. [2020-10-12 19:29:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12154 states. [2020-10-12 19:29:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12154 states to 12154 states and 16573 transitions. [2020-10-12 19:29:42,580 INFO L78 Accepts]: Start accepts. Automaton has 12154 states and 16573 transitions. Word has length 68 [2020-10-12 19:29:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:42,580 INFO L479 AbstractCegarLoop]: Abstraction has 12154 states and 16573 transitions. [2020-10-12 19:29:42,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:29:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12154 states and 16573 transitions. [2020-10-12 19:29:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:29:42,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:42,584 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:42,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:29:42,584 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1127459205, now seen corresponding path program 1 times [2020-10-12 19:29:42,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:42,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887030797] [2020-10-12 19:29:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:42,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:42,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:42,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:42,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:42,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:42,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:43,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:43,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:46,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:29:46,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:29:46,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3881 [2020-10-12 19:29:46,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:46,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:29:46,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:46,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:29:46,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:46,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:46,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:46,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:46,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:46,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:29:46,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:46,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:46,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887030797] [2020-10-12 19:29:46,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:46,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 19:29:46,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281420391] [2020-10-12 19:29:46,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:29:46,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:46,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:29:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:29:46,718 INFO L87 Difference]: Start difference. First operand 12154 states and 16573 transitions. Second operand 10 states. [2020-10-12 19:29:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:53,196 INFO L93 Difference]: Finished difference Result 32097 states and 43801 transitions. [2020-10-12 19:29:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:29:53,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-12 19:29:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:53,226 INFO L225 Difference]: With dead ends: 32097 [2020-10-12 19:29:53,226 INFO L226 Difference]: Without dead ends: 24118 [2020-10-12 19:29:53,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:29:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24118 states. [2020-10-12 19:29:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24118 to 12027. [2020-10-12 19:29:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12027 states. [2020-10-12 19:29:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 16239 transitions. [2020-10-12 19:29:56,059 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 16239 transitions. Word has length 69 [2020-10-12 19:29:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:56,059 INFO L479 AbstractCegarLoop]: Abstraction has 12027 states and 16239 transitions. [2020-10-12 19:29:56,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:29:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 16239 transitions. [2020-10-12 19:29:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:29:56,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:56,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:56,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:29:56,061 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1687940355, now seen corresponding path program 1 times [2020-10-12 19:29:56,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:56,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397944281] [2020-10-12 19:29:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:56,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:56,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:56,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:56,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:56,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:57,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:29:59,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:29:59,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3290 [2020-10-12 19:29:59,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:29:59,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:59,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:29:59,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:59,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:59,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:59,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:59,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:29:59,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:59,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:59,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:59,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:59,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397944281] [2020-10-12 19:29:59,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:29:59,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:29:59,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162859532] [2020-10-12 19:29:59,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:29:59,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:29:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:29:59,608 INFO L87 Difference]: Start difference. First operand 12027 states and 16239 transitions. Second operand 11 states. [2020-10-12 19:30:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:06,456 INFO L93 Difference]: Finished difference Result 29719 states and 40072 transitions. [2020-10-12 19:30:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 19:30:06,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-12 19:30:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:06,480 INFO L225 Difference]: With dead ends: 29719 [2020-10-12 19:30:06,480 INFO L226 Difference]: Without dead ends: 21974 [2020-10-12 19:30:06,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 19:30:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21974 states. [2020-10-12 19:30:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21974 to 13041. [2020-10-12 19:30:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13041 states. [2020-10-12 19:30:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13041 states to 13041 states and 17590 transitions. [2020-10-12 19:30:09,578 INFO L78 Accepts]: Start accepts. Automaton has 13041 states and 17590 transitions. Word has length 69 [2020-10-12 19:30:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:09,578 INFO L479 AbstractCegarLoop]: Abstraction has 13041 states and 17590 transitions. [2020-10-12 19:30:09,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:30:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 13041 states and 17590 transitions. [2020-10-12 19:30:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:30:09,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:09,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:09,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 19:30:09,581 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash 957551225, now seen corresponding path program 1 times [2020-10-12 19:30:09,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:09,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278429643] [2020-10-12 19:30:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:09,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:09,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:09,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:09,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:09,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:10,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:10,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:30:10,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:30:10,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-12 19:30:10,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:10,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:30:10,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:30:10,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:30:10,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:10,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:10,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:10,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:10,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:10,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:10,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:30:10,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:10,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:10,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278429643] [2020-10-12 19:30:10,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:10,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:30:10,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090919115] [2020-10-12 19:30:10,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:30:10,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:30:10,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:30:10,478 INFO L87 Difference]: Start difference. First operand 13041 states and 17590 transitions. Second operand 6 states. [2020-10-12 19:30:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:15,607 INFO L93 Difference]: Finished difference Result 25847 states and 35452 transitions. [2020-10-12 19:30:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:30:15,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 19:30:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:15,628 INFO L225 Difference]: With dead ends: 25847 [2020-10-12 19:30:15,628 INFO L226 Difference]: Without dead ends: 18989 [2020-10-12 19:30:15,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:30:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18989 states. [2020-10-12 19:30:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18989 to 18775. [2020-10-12 19:30:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18775 states. [2020-10-12 19:30:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18775 states to 18775 states and 25054 transitions. [2020-10-12 19:30:20,709 INFO L78 Accepts]: Start accepts. Automaton has 18775 states and 25054 transitions. Word has length 70 [2020-10-12 19:30:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:20,710 INFO L479 AbstractCegarLoop]: Abstraction has 18775 states and 25054 transitions. [2020-10-12 19:30:20,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:30:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 18775 states and 25054 transitions. [2020-10-12 19:30:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 19:30:20,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:20,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:20,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 19:30:20,715 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash 594651595, now seen corresponding path program 2 times [2020-10-12 19:30:20,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:20,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529700155] [2020-10-12 19:30:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:20,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:21,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:21,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:21,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:21,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:25,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 19:30:25,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:30:25,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:30:25,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:30:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 19:30:25,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:25,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:25,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:25,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:25,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:30:25,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:25,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:25,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:25,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529700155] [2020-10-12 19:30:25,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:25,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:30:25,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907626498] [2020-10-12 19:30:25,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:30:25,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:30:25,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:30:25,978 INFO L87 Difference]: Start difference. First operand 18775 states and 25054 transitions. Second operand 8 states. [2020-10-12 19:30:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:33,109 INFO L93 Difference]: Finished difference Result 44212 states and 58601 transitions. [2020-10-12 19:30:33,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:30:33,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 88 [2020-10-12 19:30:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:33,135 INFO L225 Difference]: With dead ends: 44212 [2020-10-12 19:30:33,136 INFO L226 Difference]: Without dead ends: 25460 [2020-10-12 19:30:33,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:30:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25460 states. [2020-10-12 19:30:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25460 to 17921. [2020-10-12 19:30:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17921 states. [2020-10-12 19:30:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17921 states to 17921 states and 23602 transitions. [2020-10-12 19:30:37,440 INFO L78 Accepts]: Start accepts. Automaton has 17921 states and 23602 transitions. Word has length 88 [2020-10-12 19:30:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:37,441 INFO L479 AbstractCegarLoop]: Abstraction has 17921 states and 23602 transitions. [2020-10-12 19:30:37,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:30:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 17921 states and 23602 transitions. [2020-10-12 19:30:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 19:30:37,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:37,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:37,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 19:30:37,447 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash -978859049, now seen corresponding path program 1 times [2020-10-12 19:30:37,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:37,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722688170] [2020-10-12 19:30:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:37,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:38,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:38,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:42,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:42,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 19:30:42,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:30:42,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:30:42,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:42,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:30:42,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:30:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:42,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:42,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:42,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:42,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:42,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:42,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:30:42,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:42,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:42,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:42,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:42,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:42,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722688170] [2020-10-12 19:30:42,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:42,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:30:42,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150140537] [2020-10-12 19:30:42,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:30:42,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:42,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:30:42,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:30:42,667 INFO L87 Difference]: Start difference. First operand 17921 states and 23602 transitions. Second operand 11 states. [2020-10-12 19:30:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:51,819 INFO L93 Difference]: Finished difference Result 38283 states and 50200 transitions. [2020-10-12 19:30:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:30:51,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 90 [2020-10-12 19:30:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:51,848 INFO L225 Difference]: With dead ends: 38283 [2020-10-12 19:30:51,848 INFO L226 Difference]: Without dead ends: 28401 [2020-10-12 19:30:51,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-10-12 19:30:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28401 states. [2020-10-12 19:30:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28401 to 17853. [2020-10-12 19:30:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17853 states. [2020-10-12 19:30:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17853 states to 17853 states and 23529 transitions. [2020-10-12 19:30:56,145 INFO L78 Accepts]: Start accepts. Automaton has 17853 states and 23529 transitions. Word has length 90 [2020-10-12 19:30:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:56,145 INFO L479 AbstractCegarLoop]: Abstraction has 17853 states and 23529 transitions. [2020-10-12 19:30:56,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:30:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17853 states and 23529 transitions. [2020-10-12 19:30:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 19:30:56,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:56,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:56,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 19:30:56,151 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1045745037, now seen corresponding path program 1 times [2020-10-12 19:30:56,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:56,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528182781] [2020-10-12 19:30:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:56,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:56,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:56,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:56,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:56,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:56,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:56,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:01,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:31:01,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:01,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:01,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:01,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:01,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:01,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:01,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:31:01,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:01,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:01,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:01,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:01,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:01,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528182781] [2020-10-12 19:31:01,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:01,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:31:01,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351702192] [2020-10-12 19:31:01,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 19:31:01,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 19:31:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:31:01,469 INFO L87 Difference]: Start difference. First operand 17853 states and 23529 transitions. Second operand 13 states. [2020-10-12 19:31:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:16,863 INFO L93 Difference]: Finished difference Result 49653 states and 65311 transitions. [2020-10-12 19:31:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 19:31:16,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-12 19:31:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:16,902 INFO L225 Difference]: With dead ends: 49653 [2020-10-12 19:31:16,902 INFO L226 Difference]: Without dead ends: 39758 [2020-10-12 19:31:16,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=940, Invalid=4316, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 19:31:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39758 states. [2020-10-12 19:31:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39758 to 21353. [2020-10-12 19:31:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21353 states. [2020-10-12 19:31:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21353 states to 21353 states and 28152 transitions. [2020-10-12 19:31:22,441 INFO L78 Accepts]: Start accepts. Automaton has 21353 states and 28152 transitions. Word has length 90 [2020-10-12 19:31:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:22,441 INFO L479 AbstractCegarLoop]: Abstraction has 21353 states and 28152 transitions. [2020-10-12 19:31:22,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 19:31:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21353 states and 28152 transitions. [2020-10-12 19:31:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:31:22,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:22,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:22,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 19:31:22,447 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1498930433, now seen corresponding path program 1 times [2020-10-12 19:31:22,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:22,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245484584] [2020-10-12 19:31:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:22,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:23,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:23,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:31:23,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:31:23,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-12 19:31:23,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:23,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:23,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-12 19:31:23,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 19:31:23,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:24,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:24,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:24,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:24,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:24,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:24,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 19:31:24,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245484584] [2020-10-12 19:31:24,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:31:24,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:31:24,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989434641] [2020-10-12 19:31:24,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:31:24,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:31:24,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:31:24,050 INFO L87 Difference]: Start difference. First operand 21353 states and 28152 transitions. Second operand 4 states. [2020-10-12 19:31:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:31,493 INFO L93 Difference]: Finished difference Result 38273 states and 50714 transitions. [2020-10-12 19:31:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:31:31,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-12 19:31:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:31,520 INFO L225 Difference]: With dead ends: 38273 [2020-10-12 19:31:31,520 INFO L226 Difference]: Without dead ends: 24248 [2020-10-12 19:31:31,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:31:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24248 states.