/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=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:55:39,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:55:39,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:55:39,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:55:39,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:55:39,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:55:39,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:55:39,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:55:39,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:55:39,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:55:39,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:55:39,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:55:39,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:55:39,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:55:39,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:55:39,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:55:39,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:55:39,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:55:39,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:55:39,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:55:39,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:55:39,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:55:39,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:55:39,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:55:39,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:55:39,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:55:39,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:55:39,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:55:39,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:55:39,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:55:39,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:55:39,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:55:39,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:55:39,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:55:39,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:55:39,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:55:39,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:55:39,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:55:39,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:55:39,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:55:39,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:55:39,916 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 06:55:39,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:55:39,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:55:39,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:55:39,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:55:39,963 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:55:39,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:55:39,963 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:55:39,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:55:39,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:55:39,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:55:39,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:55:39,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:55:39,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:55:39,966 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:55:39,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:55:39,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:55:39,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:55:39,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:55:39,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:55:39,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:55:39,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:55:39,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:55:39,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:55:39,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:55:39,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:55:39,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:55:39,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:55:39,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:55:39,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:55:39,969 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=0.6;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=0.6;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=0.6;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=0.6;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=0.6;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=0.6;log-additional-information=true; [2020-09-25 06:55:40,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:55:40,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:55:40,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:55:40,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:55:40,444 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:55:40,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 06:55:40,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1768d686/364d6d076cb6432190475ddea03d3857/FLAG872704af3 [2020-09-25 06:55:41,199 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:55:41,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 06:55:41,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1768d686/364d6d076cb6432190475ddea03d3857/FLAG872704af3 [2020-09-25 06:55:41,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1768d686/364d6d076cb6432190475ddea03d3857 [2020-09-25 06:55:41,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:55:41,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:55:41,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:41,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:55:41,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:55:41,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:41" (1/1) ... [2020-09-25 06:55:41,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2f3aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:41, skipping insertion in model container [2020-09-25 06:55:41,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:41" (1/1) ... [2020-09-25 06:55:41,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:55:41,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:55:42,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:42,221 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:55:42,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:42,725 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:55:42,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42 WrapperNode [2020-09-25 06:55:42,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:42,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:55:42,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:55:42,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:55:42,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (1/1) ... [2020-09-25 06:55:42,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:55:42,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:55:42,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:55:42,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:55:42,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (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 06:55:42,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:55:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:55:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:55:42,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:55:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:55:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:55:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 06:55:42,986 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 06:55:42,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:55:42,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:55:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 06:55:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 06:55:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 06:55:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 06:55:42,988 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 06:55:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 06:55:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 06:55:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:55:42,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:55:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:55:44,984 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:55:44,984 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 06:55:44,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:44 BoogieIcfgContainer [2020-09-25 06:55:44,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:55:44,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:55:44,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:55:45,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:55:45,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:55:41" (1/3) ... [2020-09-25 06:55:45,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407a10f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:45, skipping insertion in model container [2020-09-25 06:55:45,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:42" (2/3) ... [2020-09-25 06:55:45,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407a10f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:45, skipping insertion in model container [2020-09-25 06:55:45,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:44" (3/3) ... [2020-09-25 06:55:45,008 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 06:55:45,023 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:55:45,038 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 06:55:45,061 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 06:55:45,101 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:55:45,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:55:45,102 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:55:45,102 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:55:45,102 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:55:45,102 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:55:45,102 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:55:45,102 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:55:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states. [2020-09-25 06:55:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 06:55:45,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:45,207 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:55:45,207 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:45,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1578062424, now seen corresponding path program 1 times [2020-09-25 06:55:45,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:45,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76676738] [2020-09-25 06:55:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:46,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:47,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:47,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:50,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:50,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:50,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 06:55:50,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:55:50,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 06:55:50,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:50,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:55:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-09-25 06:55:50,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 06:55:50,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:55:51,539 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 06:55:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:51,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:51,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 06:55:51,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:51,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 06:55:51,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:51,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:51,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:51,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:51,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:51,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:52,009 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 06:55:52,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76676738] [2020-09-25 06:55:52,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:52,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:55:52,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450793735] [2020-09-25 06:55:52,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:55:52,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:55:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:52,051 INFO L87 Difference]: Start difference. First operand 1237 states. Second operand 4 states. [2020-09-25 06:55:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:57,108 INFO L93 Difference]: Finished difference Result 2024 states and 2590 transitions. [2020-09-25 06:55:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:55:57,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 465 [2020-09-25 06:55:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:57,145 INFO L225 Difference]: With dead ends: 2024 [2020-09-25 06:55:57,146 INFO L226 Difference]: Without dead ends: 1455 [2020-09-25 06:55:57,155 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 06:55:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-09-25 06:55:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1448. [2020-09-25 06:55:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-09-25 06:55:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1727 transitions. [2020-09-25 06:55:57,284 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1727 transitions. Word has length 465 [2020-09-25 06:55:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:57,286 INFO L479 AbstractCegarLoop]: Abstraction has 1448 states and 1727 transitions. [2020-09-25 06:55:57,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:55:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1727 transitions. [2020-09-25 06:55:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 06:55:57,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:57,299 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:55:57,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:55:57,300 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 888544568, now seen corresponding path program 1 times [2020-09-25 06:55:57,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:57,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142811260] [2020-09-25 06:55:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:57,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:58,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:58,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:58,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:58,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:01,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:02,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:02,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 06:56:02,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:56:02,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 06:56:02,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:02,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:02,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:56:02,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-25 06:56:02,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 06:56:02,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:03,082 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 06:56:03,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:56:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:03,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:03,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 06:56:03,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:56:03,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 06:56:03,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:03,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:56:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:56:03,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:56:03,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:03,512 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 06:56:03,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142811260] [2020-09-25 06:56:03,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:56:03,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:56:03,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508685733] [2020-09-25 06:56:03,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:56:03,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:56:03,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:56:03,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:56:03,516 INFO L87 Difference]: Start difference. First operand 1448 states and 1727 transitions. Second operand 5 states. [2020-09-25 06:56:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:56:09,947 INFO L93 Difference]: Finished difference Result 3862 states and 4652 transitions. [2020-09-25 06:56:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:56:09,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-09-25 06:56:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:56:09,963 INFO L225 Difference]: With dead ends: 3862 [2020-09-25 06:56:09,964 INFO L226 Difference]: Without dead ends: 2630 [2020-09-25 06:56:09,970 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 06:56:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2020-09-25 06:56:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2503. [2020-09-25 06:56:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2503 states. [2020-09-25 06:56:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3018 transitions. [2020-09-25 06:56:10,072 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3018 transitions. Word has length 465 [2020-09-25 06:56:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:56:10,073 INFO L479 AbstractCegarLoop]: Abstraction has 2503 states and 3018 transitions. [2020-09-25 06:56:10,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:56:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3018 transitions. [2020-09-25 06:56:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-09-25 06:56:10,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:56:10,083 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:56:10,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:56:10,084 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:56:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:56:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1155003978, now seen corresponding path program 1 times [2020-09-25 06:56:10,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:56:10,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104907247] [2020-09-25 06:56:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:56:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:10,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:10,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:12,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:14,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:14,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:15,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:15,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-09-25 06:56:15,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:56:15,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 06:56:15,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:15,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:15,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:56:15,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-09-25 06:56:15,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-09-25 06:56:15,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:15,719 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 06:56:15,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:56:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:15,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:15,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:15,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 06:56:15,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:56:15,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 06:56:15,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:15,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:56:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:56:15,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:56:15,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:16,080 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 06:56:16,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104907247] [2020-09-25 06:56:16,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:56:16,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:56:16,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615463834] [2020-09-25 06:56:16,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:56:16,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:56:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:56:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:56:16,083 INFO L87 Difference]: Start difference. First operand 2503 states and 3018 transitions. Second operand 5 states. [2020-09-25 06:56:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:56:22,827 INFO L93 Difference]: Finished difference Result 6885 states and 8354 transitions. [2020-09-25 06:56:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:56:22,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 466 [2020-09-25 06:56:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:56:22,849 INFO L225 Difference]: With dead ends: 6885 [2020-09-25 06:56:22,849 INFO L226 Difference]: Without dead ends: 4673 [2020-09-25 06:56:22,854 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 06:56:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2020-09-25 06:56:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4558. [2020-09-25 06:56:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4558 states. [2020-09-25 06:56:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4558 states to 4558 states and 5516 transitions. [2020-09-25 06:56:23,012 INFO L78 Accepts]: Start accepts. Automaton has 4558 states and 5516 transitions. Word has length 466 [2020-09-25 06:56:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:56:23,013 INFO L479 AbstractCegarLoop]: Abstraction has 4558 states and 5516 transitions. [2020-09-25 06:56:23,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:56:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4558 states and 5516 transitions. [2020-09-25 06:56:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-25 06:56:23,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:56:23,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:56:23,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:56:23,029 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:56:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:56:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1955390198, now seen corresponding path program 1 times [2020-09-25 06:56:23,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:56:23,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965069915] [2020-09-25 06:56:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:56:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:23,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:23,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:23,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:23,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:24,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:28,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:28,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 474 [2020-09-25 06:56:28,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:56:28,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-09-25 06:56:28,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:28,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:56:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-09-25 06:56:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 06:56:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:28,558 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 06:56:28,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:56:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:56:28,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:56:28,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:56:28,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 06:56:28,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:56:28,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 06:56:28,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:56:28,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:56:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:56:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:56:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:56:28,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:56:28,874 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 06:56:28,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965069915] [2020-09-25 06:56:28,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:56:28,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:56:28,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558450522] [2020-09-25 06:56:28,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:56:28,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:56:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:56:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:56:28,877 INFO L87 Difference]: Start difference. First operand 4558 states and 5516 transitions. Second operand 5 states.