/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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:55:06,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:55:06,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:55:06,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:55:06,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:55:06,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:55:06,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:55:06,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:55:06,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:55:06,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:55:06,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:55:06,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:55:06,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:55:06,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:55:06,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:55:06,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:55:06,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:55:06,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:55:06,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:55:06,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:55:06,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:55:06,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:55:06,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:55:06,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:55:06,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:55:06,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:55:06,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:55:06,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:55:06,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:55:06,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:55:06,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:55:06,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:55:06,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:55:06,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:55:06,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:55:06,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:55:06,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:55:06,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:55:06,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:55:06,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:55:06,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:55:06,374 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 06:55:06,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:55:06,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:55:06,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:55:06,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:55:06,430 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:55:06,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:55:06,430 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:55:06,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:55:06,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:55:06,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:55:06,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:55:06,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:55:06,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:55:06,433 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:55:06,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:55:06,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:55:06,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:55:06,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:55:06,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:55:06,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:55:06,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:55:06,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:55:06,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:55:06,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:55:06,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:55:06,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:55:06,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:55:06,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:55:06,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:55:06,438 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 06:55:06,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:55:06,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:55:06,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:55:06,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:55:06,950 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:55:06,951 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 06:55:07,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1f58187f/064687aa70494382b78d31b03b08cd4b/FLAGfe67a1109 [2020-09-25 06:55:07,726 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:55:07,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 06:55:07,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1f58187f/064687aa70494382b78d31b03b08cd4b/FLAGfe67a1109 [2020-09-25 06:55:07,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d1f58187f/064687aa70494382b78d31b03b08cd4b [2020-09-25 06:55:07,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:55:07,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:55:07,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:07,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:55:07,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:55:07,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:07" (1/1) ... [2020-09-25 06:55:07,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420abe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:07, skipping insertion in model container [2020-09-25 06:55:07,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:55:07" (1/1) ... [2020-09-25 06:55:08,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:55:08,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:55:08,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:08,692 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:55:08,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:55:08,894 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:55:08,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08 WrapperNode [2020-09-25 06:55:08,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:55:08,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:55:08,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:55:08,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:55:08,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (1/1) ... [2020-09-25 06:55:08,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (1/1) ... [2020-09-25 06:55:08,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (1/1) ... [2020-09-25 06:55:08,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (1/1) ... [2020-09-25 06:55:08,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (1/1) ... [2020-09-25 06:55:08,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (1/1) ... [2020-09-25 06:55:08,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (1/1) ... [2020-09-25 06:55:08,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:55:08,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:55:08,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:55:08,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:55:08,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (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 06:55:09,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:55:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:55:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:55:09,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:55:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:55:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 06:55:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 06:55:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 06:55:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:55:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:55:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 06:55:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 06:55:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 06:55:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 06:55:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 06:55:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 06:55:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 06:55:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:55:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:55:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:55:10,699 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:55:10,700 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 06:55:10,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:10 BoogieIcfgContainer [2020-09-25 06:55:10,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:55:10,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:55:10,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:55:10,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:55:10,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:55:07" (1/3) ... [2020-09-25 06:55:10,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95e729a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:10, skipping insertion in model container [2020-09-25 06:55:10,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:55:08" (2/3) ... [2020-09-25 06:55:10,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95e729a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:55:10, skipping insertion in model container [2020-09-25 06:55:10,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:55:10" (3/3) ... [2020-09-25 06:55:10,725 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 06:55:10,738 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:55:10,757 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:55:10,783 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:55:10,829 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:55:10,829 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:55:10,830 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:55:10,830 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:55:10,830 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:55:10,830 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:55:10,830 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:55:10,830 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:55:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-25 06:55:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 06:55:10,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:10,927 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] [2020-09-25 06:55:10,928 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:10,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:10,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-25 06:55:10,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:10,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156741247] [2020-09-25 06:55:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:11,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:12,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:13,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:13,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:16,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:16,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 06:55:16,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:55:16,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 06:55:16,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:16,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:55:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-09-25 06:55:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 06:55:16,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 06:55:17,247 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 06:55:17,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:17,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:17,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:17,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 06:55:17,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:17,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-25 06:55:17,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:17,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:17,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:17,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:17,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:17,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:17,834 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 06:55:17,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156741247] [2020-09-25 06:55:17,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:17,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:55:17,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687594919] [2020-09-25 06:55:17,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:55:17,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:55:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:17,879 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 4 states. [2020-09-25 06:55:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:21,431 INFO L93 Difference]: Finished difference Result 1488 states and 1948 transitions. [2020-09-25 06:55:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:55:21,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 06:55:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:21,494 INFO L225 Difference]: With dead ends: 1488 [2020-09-25 06:55:21,495 INFO L226 Difference]: Without dead ends: 1109 [2020-09-25 06:55:21,505 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 06:55:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-09-25 06:55:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2020-09-25 06:55:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-09-25 06:55:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions. [2020-09-25 06:55:21,626 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418 [2020-09-25 06:55:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:21,628 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions. [2020-09-25 06:55:21,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:55:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions. [2020-09-25 06:55:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 06:55:21,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:21,641 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] [2020-09-25 06:55:21,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:55:21,642 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times [2020-09-25 06:55:21,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:21,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589333677] [2020-09-25 06:55:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:22,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:22,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:22,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:23,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:23,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:26,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:26,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 06:55:26,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:55:26,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 06:55:26,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:26,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:55:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-25 06:55:26,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-25 06:55:26,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:27,174 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 06:55:27,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:27,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:27,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 06:55:27,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:27,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 06:55:27,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:27,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:27,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:27,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:27,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:27,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:27,646 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 06:55:27,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589333677] [2020-09-25 06:55:27,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:27,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:55:27,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159330562] [2020-09-25 06:55:27,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:55:27,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:55:27,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:27,655 INFO L87 Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states. [2020-09-25 06:55:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:30,291 INFO L93 Difference]: Finished difference Result 2222 states and 2792 transitions. [2020-09-25 06:55:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:55:30,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 06:55:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:30,304 INFO L225 Difference]: With dead ends: 2222 [2020-09-25 06:55:30,305 INFO L226 Difference]: Without dead ends: 1828 [2020-09-25 06:55:30,308 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 06:55:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-09-25 06:55:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816. [2020-09-25 06:55:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2020-09-25 06:55:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions. [2020-09-25 06:55:30,379 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418 [2020-09-25 06:55:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:30,380 INFO L479 AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions. [2020-09-25 06:55:30,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:55:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions. [2020-09-25 06:55:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 06:55:30,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:30,428 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] [2020-09-25 06:55:30,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:55:30,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times [2020-09-25 06:55:30,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:30,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689430502] [2020-09-25 06:55:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:30,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:30,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:30,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:31,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:35,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:35,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 06:55:35,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 06:55:35,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 06:55:35,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:35,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:55:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-09-25 06:55:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-25 06:55:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:35,937 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 06:55:35,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:35,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:35,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:35,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 06:55:35,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:35,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 06:55:35,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:35,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:35,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:35,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:35,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:35,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:36,231 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 06:55:36,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689430502] [2020-09-25 06:55:36,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:36,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:55:36,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188822962] [2020-09-25 06:55:36,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:55:36,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:36,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:55:36,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:36,234 INFO L87 Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states. [2020-09-25 06:55:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:38,689 INFO L93 Difference]: Finished difference Result 3904 states and 4955 transitions. [2020-09-25 06:55:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:55:38,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 06:55:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:38,706 INFO L225 Difference]: With dead ends: 3904 [2020-09-25 06:55:38,707 INFO L226 Difference]: Without dead ends: 3194 [2020-09-25 06:55:38,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:55:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-25 06:55:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172. [2020-09-25 06:55:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2020-09-25 06:55:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions. [2020-09-25 06:55:38,834 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418 [2020-09-25 06:55:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:38,835 INFO L479 AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions. [2020-09-25 06:55:38,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:55:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions. [2020-09-25 06:55:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 06:55:38,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:38,857 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] [2020-09-25 06:55:38,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:55:38,857 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:38,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times [2020-09-25 06:55:38,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:38,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436765382] [2020-09-25 06:55:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:39,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:39,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:39,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:39,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:43,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:43,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:44,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:44,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 06:55:44,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:55:44,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 06:55:44,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:44,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:55:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-09-25 06:55:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 06:55:44,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:44,514 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 06:55:44,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:55:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:44,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:44,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:55:44,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 06:55:44,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:55:44,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 06:55:44,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:55:44,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:55:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:55:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:55:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:55:44,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:55:44,781 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 06:55:44,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436765382] [2020-09-25 06:55:44,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:55:44,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:55:44,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610946004] [2020-09-25 06:55:44,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:55:44,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:55:44,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:55:44,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:55:44,784 INFO L87 Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states. [2020-09-25 06:55:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:55:49,783 INFO L93 Difference]: Finished difference Result 8867 states and 11187 transitions. [2020-09-25 06:55:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:55:49,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-25 06:55:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:55:49,820 INFO L225 Difference]: With dead ends: 8867 [2020-09-25 06:55:49,821 INFO L226 Difference]: Without dead ends: 5977 [2020-09-25 06:55:49,831 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 06:55:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2020-09-25 06:55:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5975. [2020-09-25 06:55:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5975 states. [2020-09-25 06:55:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 7480 transitions. [2020-09-25 06:55:50,106 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 7480 transitions. Word has length 418 [2020-09-25 06:55:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:55:50,107 INFO L479 AbstractCegarLoop]: Abstraction has 5975 states and 7480 transitions. [2020-09-25 06:55:50,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:55:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 7480 transitions. [2020-09-25 06:55:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 06:55:50,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:55:50,118 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] [2020-09-25 06:55:50,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:55:50,118 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:55:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:55:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash -725792445, now seen corresponding path program 1 times [2020-09-25 06:55:50,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:55:50,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617649540] [2020-09-25 06:55:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:55:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:55:50,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:50,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:50,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:50,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:50,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:55:51,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking...