/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:05:41,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:05:41,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:05:41,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:05:41,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:05:41,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:05:41,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:05:41,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:05:41,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:05:41,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:05:41,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:05:41,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:05:41,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:05:41,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:05:41,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:05:41,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:05:41,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:05:41,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:05:41,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:05:41,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:05:41,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:05:41,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:05:41,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:05:41,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:05:41,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:05:41,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:05:41,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:05:41,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:05:41,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:05:41,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:05:41,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:05:41,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:05:41,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:05:41,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:05:41,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:05:41,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:05:41,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:05:41,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:05:41,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:05:41,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:05:41,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:05:41,493 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 [2020-10-14 09:05:41,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:05:41,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:05:41,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:05:41,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:05:41,523 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:05:41,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:05:41,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:05:41,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:05:41,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:05:41,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:05:41,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:05:41,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:05:41,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:05:41,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:05:41,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:05:41,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:05:41,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:05:41,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:05:41,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:05:41,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:05:41,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:05:41,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:05:41,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:05:41,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:05:41,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:05:41,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:05:41,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:05:41,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:05:41,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:05:41,529 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:05:41,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:05:41,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:05:41,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:05:41,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:05:41,855 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:05:41,855 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-14 09:05:41,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/222701ea8/1d250a36aa5c484ebdff3900b1ad2476/FLAG57a91ab9f [2020-10-14 09:05:42,673 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:05:42,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-14 09:05:42,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/222701ea8/1d250a36aa5c484ebdff3900b1ad2476/FLAG57a91ab9f [2020-10-14 09:05:42,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/222701ea8/1d250a36aa5c484ebdff3900b1ad2476 [2020-10-14 09:05:42,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:05:42,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:05:42,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:05:42,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:05:42,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:05:42,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:05:42" (1/1) ... [2020-10-14 09:05:42,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30829a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:42, skipping insertion in model container [2020-10-14 09:05:42,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:05:42" (1/1) ... [2020-10-14 09:05:42,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:05:42,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:05:43,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:05:43,988 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:05:44,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:05:44,538 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:05:44,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44 WrapperNode [2020-10-14 09:05:44,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:05:44,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:05:44,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:05:44,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:05:44,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (1/1) ... [2020-10-14 09:05:44,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (1/1) ... [2020-10-14 09:05:44,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (1/1) ... [2020-10-14 09:05:44,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (1/1) ... [2020-10-14 09:05:44,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (1/1) ... [2020-10-14 09:05:44,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (1/1) ... [2020-10-14 09:05:44,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (1/1) ... [2020-10-14 09:05:44,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:05:44,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:05:44,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:05:44,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:05:44,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (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 [2020-10-14 09:05:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:05:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:05:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:05:44,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:05:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:05:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:05:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:05:44,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:05:44,908 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:05:44,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:05:44,908 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:05:44,909 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:05:44,909 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:05:44,909 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:05:44,909 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:05:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:05:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:05:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:05:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:05:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:05:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:05:48,077 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:05:48,078 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:05:48,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:05:48 BoogieIcfgContainer [2020-10-14 09:05:48,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:05:48,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:05:48,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:05:48,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:05:48,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:05:42" (1/3) ... [2020-10-14 09:05:48,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c60214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:05:48, skipping insertion in model container [2020-10-14 09:05:48,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:05:44" (2/3) ... [2020-10-14 09:05:48,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c60214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:05:48, skipping insertion in model container [2020-10-14 09:05:48,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:05:48" (3/3) ... [2020-10-14 09:05:48,097 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-14 09:05:48,108 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:05:48,116 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-10-14 09:05:48,131 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-14 09:05:48,159 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:05:48,160 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:05:48,160 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:05:48,160 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:05:48,160 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:05:48,160 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:05:48,160 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:05:48,160 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:05:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states. [2020-10-14 09:05:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:05:48,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:05:48,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:05:48,227 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:05:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:05:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1062072512, now seen corresponding path program 1 times [2020-10-14 09:05:48,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:05:48,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956074012] [2020-10-14 09:05:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:05:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:05:48,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:49,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:49,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:51,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:53,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:53,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:05:53,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:05:53,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:05:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-14 09:05:53,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:05:53,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:05:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:05:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:05:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 09:05:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:05:54,432 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:05:54,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:05:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:05:54,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:05:54,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:05:54,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:05:54,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:05:54,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-14 09:05:54,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:05:54,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:05:54,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:05:54,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:05:54,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:05:54,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:05:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:05:54,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956074012] [2020-10-14 09:05:54,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:05:54,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:05:54,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345771619] [2020-10-14 09:05:54,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:05:54,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:05:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:05:54,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:05:54,617 INFO L87 Difference]: Start difference. First operand 1126 states. Second operand 6 states. [2020-10-14 09:05:55,217 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-14 09:06:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:04,290 INFO L93 Difference]: Finished difference Result 2058 states and 3553 transitions. [2020-10-14 09:06:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:06:04,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-14 09:06:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:04,326 INFO L225 Difference]: With dead ends: 2058 [2020-10-14 09:06:04,326 INFO L226 Difference]: Without dead ends: 1637 [2020-10-14 09:06:04,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:06:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2020-10-14 09:06:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1486. [2020-10-14 09:06:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1486 states. [2020-10-14 09:06:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2009 transitions. [2020-10-14 09:06:04,475 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2009 transitions. Word has length 55 [2020-10-14 09:06:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:04,475 INFO L479 AbstractCegarLoop]: Abstraction has 1486 states and 2009 transitions. [2020-10-14 09:06:04,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2009 transitions. [2020-10-14 09:06:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:06:04,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:04,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:06:04,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:06:04,482 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2145753423, now seen corresponding path program 1 times [2020-10-14 09:06:04,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:04,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780691114] [2020-10-14 09:06:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:04,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:04,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:05,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:05,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:05,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:07,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:07,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:07,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:07,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:08,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:09,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:09,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:09,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:06:09,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:06:09,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:06:09,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:09,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:09,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:09,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:06:09,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 09:06:09,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:10,272 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:06:10,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:10,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:10,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:10,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:10,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-14 09:06:10,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:10,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:10,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:10,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:10,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:06:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:10,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780691114] [2020-10-14 09:06:10,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:10,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:06:10,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032562782] [2020-10-14 09:06:10,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:10,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:10,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:10,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:10,352 INFO L87 Difference]: Start difference. First operand 1486 states and 2009 transitions. Second operand 6 states. [2020-10-14 09:06:11,174 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-14 09:06:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:16,434 INFO L93 Difference]: Finished difference Result 2948 states and 4057 transitions. [2020-10-14 09:06:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:06:16,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-14 09:06:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:16,448 INFO L225 Difference]: With dead ends: 2948 [2020-10-14 09:06:16,449 INFO L226 Difference]: Without dead ends: 1860 [2020-10-14 09:06:16,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 09:06:16,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2020-10-14 09:06:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1847. [2020-10-14 09:06:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1847 states. [2020-10-14 09:06:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2537 transitions. [2020-10-14 09:06:16,559 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2537 transitions. Word has length 55 [2020-10-14 09:06:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:16,560 INFO L479 AbstractCegarLoop]: Abstraction has 1847 states and 2537 transitions. [2020-10-14 09:06:16,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2537 transitions. [2020-10-14 09:06:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:06:16,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:16,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:06:16,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:06:16,566 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash -44346844, now seen corresponding path program 1 times [2020-10-14 09:06:16,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:16,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116226382] [2020-10-14 09:06:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:17,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:18,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:20,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:21,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:21,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:06:21,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 09:06:21,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 09:06:21,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:21,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:21,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:06:21,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:06:21,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:06:21,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:22,146 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:06:22,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:22,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:22,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:22,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:22,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 09:06:22,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:22,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:22,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:22,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116226382] [2020-10-14 09:06:22,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:22,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:06:22,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494395507] [2020-10-14 09:06:22,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:06:22,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:06:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:06:22,201 INFO L87 Difference]: Start difference. First operand 1847 states and 2537 transitions. Second operand 6 states. [2020-10-14 09:06:22,691 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-14 09:06:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:29,008 INFO L93 Difference]: Finished difference Result 5900 states and 8474 transitions. [2020-10-14 09:06:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:06:29,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-14 09:06:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:29,034 INFO L225 Difference]: With dead ends: 5900 [2020-10-14 09:06:29,034 INFO L226 Difference]: Without dead ends: 5360 [2020-10-14 09:06:29,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:06:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5360 states. [2020-10-14 09:06:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5360 to 4420. [2020-10-14 09:06:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4420 states. [2020-10-14 09:06:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6185 transitions. [2020-10-14 09:06:29,234 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6185 transitions. Word has length 55 [2020-10-14 09:06:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:29,235 INFO L479 AbstractCegarLoop]: Abstraction has 4420 states and 6185 transitions. [2020-10-14 09:06:29,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:06:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6185 transitions. [2020-10-14 09:06:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:06:29,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:29,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:06:29,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:06:29,241 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1848395569, now seen corresponding path program 1 times [2020-10-14 09:06:29,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:29,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907610027] [2020-10-14 09:06:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:29,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:29,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:30,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:33,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:33,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:34,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:34,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:34,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:06:34,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:06:34,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 09:06:34,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:34,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:34,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 09:06:34,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:06:34,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 09:06:34,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:34,915 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:06:34,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:34,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:34,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:34,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 09:06:34,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:34,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:06:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:06:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:34,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907610027] [2020-10-14 09:06:34,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:34,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 09:06:34,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479397109] [2020-10-14 09:06:34,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 09:06:34,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 09:06:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:06:34,970 INFO L87 Difference]: Start difference. First operand 4420 states and 6185 transitions. Second operand 9 states. [2020-10-14 09:06:35,545 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-14 09:06:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:41,309 INFO L93 Difference]: Finished difference Result 8640 states and 12668 transitions. [2020-10-14 09:06:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 09:06:41,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-14 09:06:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:41,344 INFO L225 Difference]: With dead ends: 8640 [2020-10-14 09:06:41,345 INFO L226 Difference]: Without dead ends: 8636 [2020-10-14 09:06:41,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 09:06:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2020-10-14 09:06:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 4416. [2020-10-14 09:06:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4416 states. [2020-10-14 09:06:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 6180 transitions. [2020-10-14 09:06:41,621 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 6180 transitions. Word has length 56 [2020-10-14 09:06:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:41,622 INFO L479 AbstractCegarLoop]: Abstraction has 4416 states and 6180 transitions. [2020-10-14 09:06:41,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 09:06:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 6180 transitions. [2020-10-14 09:06:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:06:41,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:41,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:06:41,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:06:41,630 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1417414329, now seen corresponding path program 1 times [2020-10-14 09:06:41,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:41,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667311014] [2020-10-14 09:06:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:41,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:42,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:42,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:44,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:44,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:44,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:44,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:44,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:45,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:45,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:46,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:46,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:06:46,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:06:46,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:06:46,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:46,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:46,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 09:06:46,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:06:46,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:06:46,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:47,502 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:06:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:06:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:47,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:47,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:06:47,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:06:47,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-14 09:06:47,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:47,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:06:47,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:06:47,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:06:47,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:06:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:06:47,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667311014] [2020-10-14 09:06:47,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:06:47,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 09:06:47,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33456419] [2020-10-14 09:06:47,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 09:06:47,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:06:47,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 09:06:47,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:06:47,630 INFO L87 Difference]: Start difference. First operand 4416 states and 6180 transitions. Second operand 10 states. [2020-10-14 09:06:48,280 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-14 09:06:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:06:54,534 INFO L93 Difference]: Finished difference Result 11299 states and 16745 transitions. [2020-10-14 09:06:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 09:06:54,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-14 09:06:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:06:54,575 INFO L225 Difference]: With dead ends: 11299 [2020-10-14 09:06:54,575 INFO L226 Difference]: Without dead ends: 9694 [2020-10-14 09:06:54,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-14 09:06:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9694 states. [2020-10-14 09:06:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9694 to 4157. [2020-10-14 09:06:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4157 states. [2020-10-14 09:06:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 5955 transitions. [2020-10-14 09:06:54,875 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 5955 transitions. Word has length 56 [2020-10-14 09:06:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:06:54,876 INFO L479 AbstractCegarLoop]: Abstraction has 4157 states and 5955 transitions. [2020-10-14 09:06:54,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 09:06:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 5955 transitions. [2020-10-14 09:06:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:06:54,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:06:54,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:06:54,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:06:54,883 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:06:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:06:54,883 INFO L82 PathProgramCache]: Analyzing trace with hash -389119888, now seen corresponding path program 1 times [2020-10-14 09:06:54,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:06:54,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668941211] [2020-10-14 09:06:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:06:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:06:54,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:55,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:55,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:55,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:55,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:57,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:57,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:58,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:59,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:59,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:59,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:06:59,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:06:59,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:06:59,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:06:59,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:06:59,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:06:59,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:06:59,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 09:06:59,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:06:59,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 09:06:59,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:00,775 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:07:00,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:00,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:00,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:00,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:00,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:00,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 09:07:00,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:00,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:00,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:00,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:00,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:00,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:00,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668941211] [2020-10-14 09:07:00,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:00,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 09:07:00,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732270156] [2020-10-14 09:07:00,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 09:07:00,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:00,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 09:07:00,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:07:00,853 INFO L87 Difference]: Start difference. First operand 4157 states and 5955 transitions. Second operand 9 states. [2020-10-14 09:07:01,421 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-14 09:07:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:06,626 INFO L93 Difference]: Finished difference Result 11057 states and 16687 transitions. [2020-10-14 09:07:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 09:07:06,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-14 09:07:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:06,653 INFO L225 Difference]: With dead ends: 11057 [2020-10-14 09:07:06,653 INFO L226 Difference]: Without dead ends: 11053 [2020-10-14 09:07:06,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-14 09:07:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11053 states. [2020-10-14 09:07:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11053 to 4153. [2020-10-14 09:07:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4153 states. [2020-10-14 09:07:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 5950 transitions. [2020-10-14 09:07:06,972 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 5950 transitions. Word has length 56 [2020-10-14 09:07:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:06,973 INFO L479 AbstractCegarLoop]: Abstraction has 4153 states and 5950 transitions. [2020-10-14 09:07:06,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 09:07:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 5950 transitions. [2020-10-14 09:07:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:07:06,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:06,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:06,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:07:06,979 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1861783078, now seen corresponding path program 1 times [2020-10-14 09:07:06,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:06,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567985452] [2020-10-14 09:07:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:07,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:07,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:07,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:07,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:10,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:10,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3515 [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:07:10,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:11,012 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:07:11,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:11,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:11,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:11,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:11,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 09:07:11,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:11,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:11,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567985452] [2020-10-14 09:07:11,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:11,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:11,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563392603] [2020-10-14 09:07:11,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:11,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:11,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:11,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:11,070 INFO L87 Difference]: Start difference. First operand 4153 states and 5950 transitions. Second operand 4 states. [2020-10-14 09:07:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:14,669 INFO L93 Difference]: Finished difference Result 8263 states and 12326 transitions. [2020-10-14 09:07:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:07:14,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-14 09:07:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:14,683 INFO L225 Difference]: With dead ends: 8263 [2020-10-14 09:07:14,684 INFO L226 Difference]: Without dead ends: 5909 [2020-10-14 09:07:14,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5909 states. [2020-10-14 09:07:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5909 to 5907. [2020-10-14 09:07:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5907 states. [2020-10-14 09:07:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5907 states to 5907 states and 8615 transitions. [2020-10-14 09:07:15,172 INFO L78 Accepts]: Start accepts. Automaton has 5907 states and 8615 transitions. Word has length 57 [2020-10-14 09:07:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:15,172 INFO L479 AbstractCegarLoop]: Abstraction has 5907 states and 8615 transitions. [2020-10-14 09:07:15,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5907 states and 8615 transitions. [2020-10-14 09:07:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:07:15,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:15,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:15,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:07:15,177 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:15,178 INFO L82 PathProgramCache]: Analyzing trace with hash 385786614, now seen corresponding path program 1 times [2020-10-14 09:07:15,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:15,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61978674] [2020-10-14 09:07:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:15,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:15,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:15,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:16,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:16,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:16,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:18,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:19,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:19,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:20,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:07:20,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:07:20,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:07:20,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:20,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 09:07:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 09:07:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:20,723 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:07:20,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:20,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:20,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:20,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:20,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:07:20,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:20,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:20,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:20,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:20,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:20,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:20,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61978674] [2020-10-14 09:07:20,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:20,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:20,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565375775] [2020-10-14 09:07:20,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:20,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:20,766 INFO L87 Difference]: Start difference. First operand 5907 states and 8615 transitions. Second operand 4 states. [2020-10-14 09:07:21,301 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-14 09:07:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:24,334 INFO L93 Difference]: Finished difference Result 12062 states and 18047 transitions. [2020-10-14 09:07:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:24,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 09:07:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:24,352 INFO L225 Difference]: With dead ends: 12062 [2020-10-14 09:07:24,352 INFO L226 Difference]: Without dead ends: 7161 [2020-10-14 09:07:24,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7161 states. [2020-10-14 09:07:24,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7161 to 6130. [2020-10-14 09:07:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6130 states. [2020-10-14 09:07:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 9113 transitions. [2020-10-14 09:07:24,811 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 9113 transitions. Word has length 58 [2020-10-14 09:07:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:24,811 INFO L479 AbstractCegarLoop]: Abstraction has 6130 states and 9113 transitions. [2020-10-14 09:07:24,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 9113 transitions. [2020-10-14 09:07:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 09:07:24,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:24,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:24,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:07:24,815 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:24,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1129336821, now seen corresponding path program 1 times [2020-10-14 09:07:24,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:24,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101631785] [2020-10-14 09:07:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:24,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:24,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:26,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:26,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:28,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:28,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 09:07:28,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:07:28,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3577 [2020-10-14 09:07:28,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:28,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 09:07:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:07:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 09:07:28,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:29,030 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:07:29,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:29,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:29,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:29,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:29,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:29,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:07:29,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:29,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:29,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:29,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101631785] [2020-10-14 09:07:29,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:29,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 09:07:29,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436054398] [2020-10-14 09:07:29,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 09:07:29,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:29,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 09:07:29,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:07:29,113 INFO L87 Difference]: Start difference. First operand 6130 states and 9113 transitions. Second operand 9 states. [2020-10-14 09:07:29,669 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-14 09:07:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:34,656 INFO L93 Difference]: Finished difference Result 18641 states and 28129 transitions. [2020-10-14 09:07:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 09:07:34,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-14 09:07:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:34,680 INFO L225 Difference]: With dead ends: 18641 [2020-10-14 09:07:34,680 INFO L226 Difference]: Without dead ends: 16665 [2020-10-14 09:07:34,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-14 09:07:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16665 states. [2020-10-14 09:07:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16665 to 6118. [2020-10-14 09:07:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6118 states. [2020-10-14 09:07:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6118 states to 6118 states and 9099 transitions. [2020-10-14 09:07:35,395 INFO L78 Accepts]: Start accepts. Automaton has 6118 states and 9099 transitions. Word has length 59 [2020-10-14 09:07:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:35,395 INFO L479 AbstractCegarLoop]: Abstraction has 6118 states and 9099 transitions. [2020-10-14 09:07:35,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 09:07:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6118 states and 9099 transitions. [2020-10-14 09:07:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:07:35,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:35,402 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:35,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:07:35,402 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash -594357930, now seen corresponding path program 1 times [2020-10-14 09:07:35,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:35,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779025895] [2020-10-14 09:07:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:35,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:36,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:36,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:36,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:07:36,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 09:07:36,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1357 [2020-10-14 09:07:36,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:36,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:36,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:36,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 09:07:36,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:07:36,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:37,358 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:07:37,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:37,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:37,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:37,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:37,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:37,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:07:37,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:37,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:37,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:37,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779025895] [2020-10-14 09:07:37,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:37,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:37,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387751579] [2020-10-14 09:07:37,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:37,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:37,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:37,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:37,391 INFO L87 Difference]: Start difference. First operand 6118 states and 9099 transitions. Second operand 4 states. [2020-10-14 09:07:37,909 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-14 09:07:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:41,017 INFO L93 Difference]: Finished difference Result 15450 states and 23449 transitions. [2020-10-14 09:07:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:41,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 09:07:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:41,031 INFO L225 Difference]: With dead ends: 15450 [2020-10-14 09:07:41,031 INFO L226 Difference]: Without dead ends: 10693 [2020-10-14 09:07:41,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10693 states. [2020-10-14 09:07:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10693 to 10691. [2020-10-14 09:07:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10691 states. [2020-10-14 09:07:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10691 states to 10691 states and 15982 transitions. [2020-10-14 09:07:41,956 INFO L78 Accepts]: Start accepts. Automaton has 10691 states and 15982 transitions. Word has length 64 [2020-10-14 09:07:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:41,956 INFO L479 AbstractCegarLoop]: Abstraction has 10691 states and 15982 transitions. [2020-10-14 09:07:41,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10691 states and 15982 transitions. [2020-10-14 09:07:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 09:07:41,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:41,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:41,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:07:41,961 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1523685861, now seen corresponding path program 1 times [2020-10-14 09:07:41,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:41,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884860668] [2020-10-14 09:07:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:42,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:43,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:43,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 09:07:43,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:07:43,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1108 [2020-10-14 09:07:43,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:43,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:07:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 09:07:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 09:07:43,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:43,633 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:07:43,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:43,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:43,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:43,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:43,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:43,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:07:43,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:43,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:43,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:43,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:43,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:43,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:43,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884860668] [2020-10-14 09:07:43,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:43,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:07:43,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475485753] [2020-10-14 09:07:43,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:07:43,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:43,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:07:43,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:43,672 INFO L87 Difference]: Start difference. First operand 10691 states and 15982 transitions. Second operand 6 states. [2020-10-14 09:07:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:47,786 INFO L93 Difference]: Finished difference Result 27475 states and 41859 transitions. [2020-10-14 09:07:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:07:47,787 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-14 09:07:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:47,813 INFO L225 Difference]: With dead ends: 27475 [2020-10-14 09:07:47,813 INFO L226 Difference]: Without dead ends: 18070 [2020-10-14 09:07:47,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:07:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18070 states. [2020-10-14 09:07:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18070 to 13120. [2020-10-14 09:07:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13120 states. [2020-10-14 09:07:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 19767 transitions. [2020-10-14 09:07:48,917 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 19767 transitions. Word has length 65 [2020-10-14 09:07:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:48,917 INFO L479 AbstractCegarLoop]: Abstraction has 13120 states and 19767 transitions. [2020-10-14 09:07:48,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:07:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 19767 transitions. [2020-10-14 09:07:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 09:07:48,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:48,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:48,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:07:48,923 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:48,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1955312097, now seen corresponding path program 1 times [2020-10-14 09:07:48,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:48,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890883732] [2020-10-14 09:07:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:48,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:48,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:49,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:49,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:50,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:50,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 09:07:50,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:07:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2029 [2020-10-14 09:07:50,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:50,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:07:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:07:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 09:07:50,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:07:51,506 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:07:51,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:07:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:51,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:51,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:07:51,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:07:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:07:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:07:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:07:51,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:07:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:07:51,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890883732] [2020-10-14 09:07:51,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:07:51,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:07:51,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327449211] [2020-10-14 09:07:51,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:07:51,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:07:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:07:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:07:51,559 INFO L87 Difference]: Start difference. First operand 13120 states and 19767 transitions. Second operand 4 states. [2020-10-14 09:07:52,097 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-14 09:07:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:07:56,713 INFO L93 Difference]: Finished difference Result 35740 states and 54401 transitions. [2020-10-14 09:07:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:07:56,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 09:07:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:07:56,743 INFO L225 Difference]: With dead ends: 35740 [2020-10-14 09:07:56,743 INFO L226 Difference]: Without dead ends: 23974 [2020-10-14 09:07:56,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:07:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23974 states. [2020-10-14 09:07:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23974 to 22508. [2020-10-14 09:07:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22508 states. [2020-10-14 09:07:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22508 states to 22508 states and 34083 transitions. [2020-10-14 09:07:59,529 INFO L78 Accepts]: Start accepts. Automaton has 22508 states and 34083 transitions. Word has length 65 [2020-10-14 09:07:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:07:59,529 INFO L479 AbstractCegarLoop]: Abstraction has 22508 states and 34083 transitions. [2020-10-14 09:07:59,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:07:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 22508 states and 34083 transitions. [2020-10-14 09:07:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:07:59,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:07:59,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:07:59,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:07:59,536 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:07:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:07:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1064300102, now seen corresponding path program 1 times [2020-10-14 09:07:59,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:07:59,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157958651] [2020-10-14 09:07:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:07:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:07:59,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:07:59,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:00,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:00,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:08:00,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:08:00,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-14 09:08:00,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:00,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:00,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:00,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:08:00,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 09:08:00,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:01,137 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:08:01,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:01,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:01,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:01,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:01,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:01,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:08:01,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:01,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:01,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:01,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157958651] [2020-10-14 09:08:01,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:01,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:01,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047104733] [2020-10-14 09:08:01,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:01,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:01,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:01,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:01,174 INFO L87 Difference]: Start difference. First operand 22508 states and 34083 transitions. Second operand 4 states. [2020-10-14 09:08:01,710 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-14 09:08:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:07,837 INFO L93 Difference]: Finished difference Result 62384 states and 94501 transitions. [2020-10-14 09:08:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:07,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:08:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:07,887 INFO L225 Difference]: With dead ends: 62384 [2020-10-14 09:08:07,887 INFO L226 Difference]: Without dead ends: 41202 [2020-10-14 09:08:07,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41202 states. [2020-10-14 09:08:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41202 to 37776. [2020-10-14 09:08:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37776 states. [2020-10-14 09:08:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 56675 transitions. [2020-10-14 09:08:11,191 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 56675 transitions. Word has length 67 [2020-10-14 09:08:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:11,191 INFO L479 AbstractCegarLoop]: Abstraction has 37776 states and 56675 transitions. [2020-10-14 09:08:11,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 56675 transitions. [2020-10-14 09:08:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:08:11,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:11,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:11,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:08:11,196 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -370401946, now seen corresponding path program 1 times [2020-10-14 09:08:11,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:11,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608233394] [2020-10-14 09:08:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:11,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:11,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:11,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:11,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:08:11,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:08:11,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-14 09:08:11,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:11,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 09:08:11,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:08:11,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:12,487 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:08:12,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:12,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:12,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:12,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:12,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:12,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 09:08:12,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:12,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:12,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:12,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:12,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 09:08:12,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:08:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:12,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608233394] [2020-10-14 09:08:12,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:12,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:08:12,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436567945] [2020-10-14 09:08:12,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:12,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:12,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:12,539 INFO L87 Difference]: Start difference. First operand 37776 states and 56675 transitions. Second operand 6 states. [2020-10-14 09:08:13,101 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-14 09:08:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:18,154 INFO L93 Difference]: Finished difference Result 55884 states and 84061 transitions. [2020-10-14 09:08:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:08:18,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 09:08:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:18,199 INFO L225 Difference]: With dead ends: 55884 [2020-10-14 09:08:18,199 INFO L226 Difference]: Without dead ends: 28274 [2020-10-14 09:08:18,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:08:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28274 states. [2020-10-14 09:08:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28274 to 19066. [2020-10-14 09:08:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19066 states. [2020-10-14 09:08:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19066 states to 19066 states and 28321 transitions. [2020-10-14 09:08:20,412 INFO L78 Accepts]: Start accepts. Automaton has 19066 states and 28321 transitions. Word has length 68 [2020-10-14 09:08:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:20,412 INFO L479 AbstractCegarLoop]: Abstraction has 19066 states and 28321 transitions. [2020-10-14 09:08:20,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:08:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 19066 states and 28321 transitions. [2020-10-14 09:08:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:08:20,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:20,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:20,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:08:20,414 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1137965166, now seen corresponding path program 1 times [2020-10-14 09:08:20,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:20,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706930543] [2020-10-14 09:08:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:20,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:21,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:21,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:21,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:08:21,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:08:21,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1318 [2020-10-14 09:08:21,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:21,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:08:21,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:08:21,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:08:21,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:22,375 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:08:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:22,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:22,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:22,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:22,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:22,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:08:22,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:22,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:22,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:22,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:22,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706930543] [2020-10-14 09:08:22,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:22,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 09:08:22,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588235096] [2020-10-14 09:08:22,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:08:22,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:22,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:08:22,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:08:22,417 INFO L87 Difference]: Start difference. First operand 19066 states and 28321 transitions. Second operand 7 states. [2020-10-14 09:08:23,002 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-14 09:08:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:31,618 INFO L93 Difference]: Finished difference Result 61626 states and 91491 transitions. [2020-10-14 09:08:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:08:31,619 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-14 09:08:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:31,665 INFO L225 Difference]: With dead ends: 61626 [2020-10-14 09:08:31,665 INFO L226 Difference]: Without dead ends: 41945 [2020-10-14 09:08:31,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-14 09:08:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41945 states. [2020-10-14 09:08:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41945 to 26708. [2020-10-14 09:08:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26708 states. [2020-10-14 09:08:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26708 states to 26708 states and 39571 transitions. [2020-10-14 09:08:34,505 INFO L78 Accepts]: Start accepts. Automaton has 26708 states and 39571 transitions. Word has length 68 [2020-10-14 09:08:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:34,505 INFO L479 AbstractCegarLoop]: Abstraction has 26708 states and 39571 transitions. [2020-10-14 09:08:34,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:08:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26708 states and 39571 transitions. [2020-10-14 09:08:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:08:34,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:34,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:34,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:08:34,508 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash 262055116, now seen corresponding path program 1 times [2020-10-14 09:08:34,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:34,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278325084] [2020-10-14 09:08:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:34,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:35,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:37,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:39,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:39,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:08:39,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:08:39,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:08:39,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:39,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:39,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:08:39,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 09:08:39,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:08:39,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:40,065 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:08:40,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:40,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:40,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:40,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:40,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:08:40,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:40,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:40,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:40,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278325084] [2020-10-14 09:08:40,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:40,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:08:40,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382001227] [2020-10-14 09:08:40,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:08:40,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:40,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:08:40,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:08:40,100 INFO L87 Difference]: Start difference. First operand 26708 states and 39571 transitions. Second operand 4 states. [2020-10-14 09:08:40,673 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-14 09:08:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:46,399 INFO L93 Difference]: Finished difference Result 36387 states and 53727 transitions. [2020-10-14 09:08:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:08:46,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:08:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:46,438 INFO L225 Difference]: With dead ends: 36387 [2020-10-14 09:08:46,438 INFO L226 Difference]: Without dead ends: 27307 [2020-10-14 09:08:46,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:08:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27307 states. [2020-10-14 09:08:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27307 to 22355. [2020-10-14 09:08:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22355 states. [2020-10-14 09:08:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22355 states to 22355 states and 32654 transitions. [2020-10-14 09:08:48,873 INFO L78 Accepts]: Start accepts. Automaton has 22355 states and 32654 transitions. Word has length 68 [2020-10-14 09:08:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:08:48,873 INFO L479 AbstractCegarLoop]: Abstraction has 22355 states and 32654 transitions. [2020-10-14 09:08:48,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:08:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22355 states and 32654 transitions. [2020-10-14 09:08:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:08:48,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:08:48,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:08:48,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:08:48,876 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:08:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:08:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash -505141969, now seen corresponding path program 1 times [2020-10-14 09:08:48,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:08:48,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457556109] [2020-10-14 09:08:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:08:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:48,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:48,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:48,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:49,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2454 [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 09:08:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:08:51,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:51,933 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:08:51,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:08:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:08:51,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:08:51,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:08:51,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:08:51,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:08:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:08:51,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:08:51,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:08:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:08:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:08:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:08:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:08:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:08:51,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457556109] [2020-10-14 09:08:51,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:08:51,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:08:51,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636503922] [2020-10-14 09:08:51,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:08:51,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:08:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:08:51,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:08:51,972 INFO L87 Difference]: Start difference. First operand 22355 states and 32654 transitions. Second operand 6 states. [2020-10-14 09:08:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:08:59,137 INFO L93 Difference]: Finished difference Result 41313 states and 58912 transitions. [2020-10-14 09:08:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:08:59,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 09:08:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:08:59,184 INFO L225 Difference]: With dead ends: 41313 [2020-10-14 09:08:59,184 INFO L226 Difference]: Without dead ends: 41306 [2020-10-14 09:08:59,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:08:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41306 states. [2020-10-14 09:09:01,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41306 to 23327. [2020-10-14 09:09:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23327 states. [2020-10-14 09:09:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23327 states to 23327 states and 33624 transitions. [2020-10-14 09:09:01,969 INFO L78 Accepts]: Start accepts. Automaton has 23327 states and 33624 transitions. Word has length 68 [2020-10-14 09:09:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:01,969 INFO L479 AbstractCegarLoop]: Abstraction has 23327 states and 33624 transitions. [2020-10-14 09:09:01,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:09:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 23327 states and 33624 transitions. [2020-10-14 09:09:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:09:01,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:01,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:01,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:09:01,972 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1677910842, now seen corresponding path program 1 times [2020-10-14 09:09:01,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:01,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269118822] [2020-10-14 09:09:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:02,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:04,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:04,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:09:04,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:09:04,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2048 [2020-10-14 09:09:04,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:04,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 09:09:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 09:09:04,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:04,557 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:09:04,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:04,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:04,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:04,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:04,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:09:04,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:04,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:04,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:04,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:04,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:04,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:04,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269118822] [2020-10-14 09:09:04,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:04,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:04,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703969136] [2020-10-14 09:09:04,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:04,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:04,593 INFO L87 Difference]: Start difference. First operand 23327 states and 33624 transitions. Second operand 4 states. [2020-10-14 09:09:05,161 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-14 09:09:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:09:12,324 INFO L93 Difference]: Finished difference Result 61722 states and 88121 transitions. [2020-10-14 09:09:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:09:12,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 09:09:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:09:12,375 INFO L225 Difference]: With dead ends: 61722 [2020-10-14 09:09:12,375 INFO L226 Difference]: Without dead ends: 39188 [2020-10-14 09:09:12,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:09:12,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39188 states. [2020-10-14 09:09:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39188 to 38535. [2020-10-14 09:09:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38535 states. [2020-10-14 09:09:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38535 states to 38535 states and 53853 transitions. [2020-10-14 09:09:17,227 INFO L78 Accepts]: Start accepts. Automaton has 38535 states and 53853 transitions. Word has length 69 [2020-10-14 09:09:17,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:09:17,227 INFO L479 AbstractCegarLoop]: Abstraction has 38535 states and 53853 transitions. [2020-10-14 09:09:17,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:09:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 38535 states and 53853 transitions. [2020-10-14 09:09:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:09:17,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:09:17,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:09:17,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:09:17,232 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:09:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:09:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1081230429, now seen corresponding path program 1 times [2020-10-14 09:09:17,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:09:17,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011945272] [2020-10-14 09:09:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:09:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:17,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:17,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:18,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:21,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:21,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:22,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:22,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:09:22,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:09:22,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:09:22,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:22,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:22,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:09:22,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 09:09:22,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:09:22,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:22,765 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-14 09:09:22,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:09:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:09:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:09:22,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:09:22,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:09:22,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:09:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:09:22,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011945272] [2020-10-14 09:09:22,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:09:22,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:09:22,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692258567] [2020-10-14 09:09:22,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:09:22,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:09:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:09:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:09:22,803 INFO L87 Difference]: Start difference. First operand 38535 states and 53853 transitions. Second operand 4 states.