/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:46:43,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:46:43,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:46:43,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:46:43,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:46:43,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:46:43,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:46:43,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:46:43,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:46:43,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:46:43,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:46:43,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:46:43,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:46:43,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:46:43,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:46:43,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:46:43,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:46:43,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:46:43,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:46:43,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:46:43,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:46:43,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:46:43,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:46:43,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:46:43,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:46:43,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:46:43,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:46:43,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:46:43,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:46:43,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:46:43,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:46:43,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:46:43,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:46:43,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:46:43,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:46:43,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:46:43,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:46:43,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:46:43,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:46:43,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:46:43,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:46:43,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 05:46:43,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:46:43,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:46:43,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:46:43,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:46:43,739 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:46:43,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:46:43,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:46:43,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:46:43,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:46:43,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:46:43,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:46:43,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:46:43,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:46:43,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:46:43,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:46:43,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:46:43,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:46:43,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:46:43,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:46:43,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:46:43,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:46:43,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:46:43,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:46:43,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:46:43,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:46:43,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:46:43,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:46:43,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:46:43,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:46:43,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:46:44,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:46:44,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:46:44,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:46:44,265 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:46:44,267 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:46:44,268 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 05:46:44,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b777eb396/b5780e5481374ae986ebaf8b34dbe77c/FLAG74f4d0d4d [2020-09-25 05:46:45,017 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:46:45,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 05:46:45,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b777eb396/b5780e5481374ae986ebaf8b34dbe77c/FLAG74f4d0d4d [2020-09-25 05:46:45,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b777eb396/b5780e5481374ae986ebaf8b34dbe77c [2020-09-25 05:46:45,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:46:45,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:46:45,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:45,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:46:45,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:46:45,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:45" (1/1) ... [2020-09-25 05:46:45,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17866592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:45, skipping insertion in model container [2020-09-25 05:46:45,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:45" (1/1) ... [2020-09-25 05:46:45,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:46:45,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:46:46,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:46,064 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:46:46,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:46,463 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:46:46,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46 WrapperNode [2020-09-25 05:46:46,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:46,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:46:46,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:46:46,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:46:46,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:46:46,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:46:46,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:46:46,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:46:46,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:46:46,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:46:46,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:46:46,680 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:46:46,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:46:46,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:46:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 05:46:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 05:46:46,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 05:46:46,682 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 05:46:46,683 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:46:46,683 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:46:46,683 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 05:46:46,683 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 05:46:46,684 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 05:46:46,684 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 05:46:46,685 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 05:46:46,685 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 05:46:46,686 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 05:46:46,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:46:46,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:46:46,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:46:48,860 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:46:48,860 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:46:48,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:48 BoogieIcfgContainer [2020-09-25 05:46:48,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:46:48,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:46:48,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:46:48,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:46:48,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:46:45" (1/3) ... [2020-09-25 05:46:48,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39150666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:48, skipping insertion in model container [2020-09-25 05:46:48,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (2/3) ... [2020-09-25 05:46:48,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39150666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:48, skipping insertion in model container [2020-09-25 05:46:48,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:48" (3/3) ... [2020-09-25 05:46:48,896 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 05:46:48,908 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:46:48,925 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 05:46:48,944 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 05:46:48,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:46:48,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:46:48,977 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:46:48,978 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:46:48,978 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:46:48,978 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:46:48,978 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:46:48,978 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:46:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-25 05:46:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 05:46:49,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:49,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:46:49,064 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:49,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:49,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-25 05:46:49,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:49,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001209505] [2020-09-25 05:46:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:51,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:51,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:54,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:54,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:54,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 05:46:54,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:46:54,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 05:46:54,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:54,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:46:54,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 05:46:54,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 05:46:54,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:46:55,377 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 05:46:55,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:55,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:55,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 05:46:55,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:55,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 05:46:55,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:55,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:55,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:55,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:55,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:55,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:46:55,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001209505] [2020-09-25 05:46:55,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:55,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:46:55,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744629033] [2020-09-25 05:46:55,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:46:55,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:55,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:46:55,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:55,862 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 4 states. [2020-09-25 05:47:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:00,530 INFO L93 Difference]: Finished difference Result 2019 states and 2601 transitions. [2020-09-25 05:47:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:47:00,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 05:47:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:00,564 INFO L225 Difference]: With dead ends: 2019 [2020-09-25 05:47:00,564 INFO L226 Difference]: Without dead ends: 1445 [2020-09-25 05:47:00,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-09-25 05:47:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438. [2020-09-25 05:47:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2020-09-25 05:47:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions. [2020-09-25 05:47:00,703 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456 [2020-09-25 05:47:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:00,704 INFO L479 AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions. [2020-09-25 05:47:00,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:47:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions. [2020-09-25 05:47:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 05:47:00,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:00,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:00,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:47:00,718 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times [2020-09-25 05:47:00,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:00,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563249790] [2020-09-25 05:47:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:00,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:02,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:04,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:05,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:05,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:05,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 05:47:05,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:47:05,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 05:47:05,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:05,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:05,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:47:05,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-09-25 05:47:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 05:47:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:06,241 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 05:47:06,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:06,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:06,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 05:47:06,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:06,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 05:47:06,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:06,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:06,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:06,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563249790] [2020-09-25 05:47:06,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:06,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:47:06,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256679273] [2020-09-25 05:47:06,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:47:06,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:47:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:06,778 INFO L87 Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states. [2020-09-25 05:47:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:10,515 INFO L93 Difference]: Finished difference Result 2635 states and 3268 transitions. [2020-09-25 05:47:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:47:10,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 05:47:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:10,529 INFO L225 Difference]: With dead ends: 2635 [2020-09-25 05:47:10,529 INFO L226 Difference]: Without dead ends: 2144 [2020-09-25 05:47:10,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-09-25 05:47:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132. [2020-09-25 05:47:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2020-09-25 05:47:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions. [2020-09-25 05:47:10,595 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456 [2020-09-25 05:47:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:10,596 INFO L479 AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions. [2020-09-25 05:47:10,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:47:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions. [2020-09-25 05:47:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 05:47:10,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:10,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:10,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:47:10,608 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:10,609 INFO L82 PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times [2020-09-25 05:47:10,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:10,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649178399] [2020-09-25 05:47:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:10,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:14,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:15,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:15,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 05:47:15,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:47:15,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 05:47:15,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:15,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:47:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-09-25 05:47:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 05:47:15,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:16,250 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 05:47:16,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:16,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:16,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:16,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 05:47:16,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:16,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 05:47:16,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:16,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:16,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:16,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:16,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649178399] [2020-09-25 05:47:16,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:16,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:47:16,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702050584] [2020-09-25 05:47:16,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:47:16,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:47:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:47:16,530 INFO L87 Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states. [2020-09-25 05:47:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:22,937 INFO L93 Difference]: Finished difference Result 5887 states and 7288 transitions. [2020-09-25 05:47:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:47:22,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-25 05:47:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:22,955 INFO L225 Difference]: With dead ends: 5887 [2020-09-25 05:47:22,956 INFO L226 Difference]: Without dead ends: 3958 [2020-09-25 05:47:22,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:47:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2020-09-25 05:47:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3827. [2020-09-25 05:47:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3827 states. [2020-09-25 05:47:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 4733 transitions. [2020-09-25 05:47:23,079 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 4733 transitions. Word has length 456 [2020-09-25 05:47:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:23,079 INFO L479 AbstractCegarLoop]: Abstraction has 3827 states and 4733 transitions. [2020-09-25 05:47:23,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:47:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 4733 transitions. [2020-09-25 05:47:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-25 05:47:23,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:23,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:23,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:47:23,089 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1610099519, now seen corresponding path program 1 times [2020-09-25 05:47:23,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:23,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906371667] [2020-09-25 05:47:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:23,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:23,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:23,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:23,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:24,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:26,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:28,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:28,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-25 05:47:28,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:47:28,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 05:47:28,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:28,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:28,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:47:28,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-09-25 05:47:28,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 05:47:28,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:28,542 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 05:47:28,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:28,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:28,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:28,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 05:47:28,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:28,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 05:47:28,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:28,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:28,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:28,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:28,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:28,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906371667] [2020-09-25 05:47:28,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:28,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:47:28,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688673681] [2020-09-25 05:47:28,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:47:28,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:28,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:47:28,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:28,748 INFO L87 Difference]: Start difference. First operand 3827 states and 4733 transitions. Second operand 4 states. [2020-09-25 05:47:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:32,977 INFO L93 Difference]: Finished difference Result 11062 states and 13753 transitions. [2020-09-25 05:47:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:47:32,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 457 [2020-09-25 05:47:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:33,005 INFO L225 Difference]: With dead ends: 11062 [2020-09-25 05:47:33,006 INFO L226 Difference]: Without dead ends: 7448 [2020-09-25 05:47:33,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7448 states. [2020-09-25 05:47:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7448 to 3829. [2020-09-25 05:47:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3829 states. [2020-09-25 05:47:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 4735 transitions. [2020-09-25 05:47:33,167 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 4735 transitions. Word has length 457 [2020-09-25 05:47:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:33,168 INFO L479 AbstractCegarLoop]: Abstraction has 3829 states and 4735 transitions. [2020-09-25 05:47:33,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:47:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 4735 transitions. [2020-09-25 05:47:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-09-25 05:47:33,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:33,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:33,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:47:33,176 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2040039379, now seen corresponding path program 1 times [2020-09-25 05:47:33,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:33,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256276997] [2020-09-25 05:47:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:33,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:33,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking...