/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=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:13:43,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:13:43,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:13:43,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:13:43,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:13:43,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:13:43,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:13:43,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:13:43,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:13:43,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:13:43,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:13:43,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:13:43,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:13:43,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:13:43,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:13:43,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:13:43,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:13:43,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:13:43,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:13:43,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:13:43,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:13:43,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:13:43,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:13:43,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:13:43,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:13:43,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:13:43,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:13:43,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:13:43,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:13:43,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:13:43,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:13:43,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:13:43,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:13:43,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:13:43,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:13:43,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:13:43,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:13:43,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:13:43,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:13:43,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:13:43,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:13:43,280 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 09:13:43,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:13:43,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:13:43,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:13:43,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:13:43,333 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:13:43,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:13:43,333 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:13:43,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:13:43,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:13:43,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:13:43,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:13:43,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:13:43,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:13:43,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:13:43,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:13:43,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:13:43,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:13:43,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:13:43,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:13:43,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:13:43,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:13:43,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:13:43,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:13:43,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:13:43,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:13:43,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:13:43,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:13:43,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:13:43,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:13:43,339 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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-09-25 09:13:43,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:13:43,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:13:43,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:13:43,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:13:43,824 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:13:43,825 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:43,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1eb808f86/da9a1bdd0413454ab03dbbe9138d3f1a/FLAG7372a1159 [2020-09-25 09:13:44,553 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:13:44,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:44,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1eb808f86/da9a1bdd0413454ab03dbbe9138d3f1a/FLAG7372a1159 [2020-09-25 09:13:44,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1eb808f86/da9a1bdd0413454ab03dbbe9138d3f1a [2020-09-25 09:13:44,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:13:44,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:13:44,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:44,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:13:44,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:13:44,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:44" (1/1) ... [2020-09-25 09:13:44,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e342344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:44, skipping insertion in model container [2020-09-25 09:13:44,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:44" (1/1) ... [2020-09-25 09:13:44,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:13:44,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:13:45,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:45,556 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:13:45,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:45,767 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:13:45,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45 WrapperNode [2020-09-25 09:13:45,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:45,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:13:45,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:13:45,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:13:45,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (1/1) ... [2020-09-25 09:13:45,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (1/1) ... [2020-09-25 09:13:45,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (1/1) ... [2020-09-25 09:13:45,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (1/1) ... [2020-09-25 09:13:45,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (1/1) ... [2020-09-25 09:13:45,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (1/1) ... [2020-09-25 09:13:45,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (1/1) ... [2020-09-25 09:13:45,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:13:45,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:13:45,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:13:45,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:13:45,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (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 09:13:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:13:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:13:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:13:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:13:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:13:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 09:13:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 09:13:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 09:13:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 09:13:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:13:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:13:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 09:13:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 09:13:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 09:13:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 09:13:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 09:13:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 09:13:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 09:13:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:13:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:13:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:13:47,873 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:13:47,874 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:13:47,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:47 BoogieIcfgContainer [2020-09-25 09:13:47,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:13:47,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:13:47,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:13:47,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:13:47,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:13:44" (1/3) ... [2020-09-25 09:13:47,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ea0c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:47, skipping insertion in model container [2020-09-25 09:13:47,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:45" (2/3) ... [2020-09-25 09:13:47,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ea0c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:47, skipping insertion in model container [2020-09-25 09:13:47,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:47" (3/3) ... [2020-09-25 09:13:47,907 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:47,921 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:13:47,940 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:13:47,966 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:13:48,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:13:48,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:13:48,016 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:13:48,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:13:48,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:13:48,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:13:48,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:13:48,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:13:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-25 09:13:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 09:13:48,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:48,122 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] [2020-09-25 09:13:48,123 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:48,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-25 09:13:48,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:48,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670310991] [2020-09-25 09:13:48,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:49,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:49,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:49,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:50,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:50,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:50,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:51,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:53,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:53,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:53,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 09:13:53,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:13:53,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 09:13:53,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:53,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:13:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-25 09:13:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 09:13:53,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:13:54,472 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 09:13:54,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:54,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:54,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:54,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 09:13:54,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 09:13:54,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:54,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:54,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:54,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:54,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:54,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:55,014 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 09:13:55,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670310991] [2020-09-25 09:13:55,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:55,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:13:55,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703873733] [2020-09-25 09:13:55,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:13:55,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:55,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:13:55,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:13:55,056 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-25 09:13:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:58,635 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-25 09:13:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:13:58,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 09:13:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:58,671 INFO L225 Difference]: With dead ends: 1657 [2020-09-25 09:13:58,672 INFO L226 Difference]: Without dead ends: 1241 [2020-09-25 09:13:58,680 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 09:13:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-25 09:13:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-25 09:13:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-25 09:13:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-25 09:13:58,842 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-25 09:13:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:58,844 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-25 09:13:58,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:13:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-25 09:13:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 09:13:58,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:58,855 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] [2020-09-25 09:13:58,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:13:58,856 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-25 09:13:58,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:58,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962630940] [2020-09-25 09:13:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:02,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:02,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:04,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:04,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 09:14:04,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:14:04,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-09-25 09:14:04,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:04,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:14:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-25 09:14:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 09:14:04,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 09:14:04,606 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 09:14:04,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:04,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:04,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 09:14:04,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 09:14:04,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:04,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:04,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:04,994 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 09:14:04,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962630940] [2020-09-25 09:14:04,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:04,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 09:14:04,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347287816] [2020-09-25 09:14:05,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 09:14:05,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:05,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 09:14:05,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 09:14:05,001 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-25 09:14:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:08,102 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-25 09:14:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 09:14:08,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 09:14:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:08,120 INFO L225 Difference]: With dead ends: 2498 [2020-09-25 09:14:08,121 INFO L226 Difference]: Without dead ends: 2052 [2020-09-25 09:14:08,126 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 09:14:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-25 09:14:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-25 09:14:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-25 09:14:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-25 09:14:08,189 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-25 09:14:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:08,190 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-25 09:14:08,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 09:14:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-25 09:14:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 09:14:08,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:08,202 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] [2020-09-25 09:14:08,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:14:08,202 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-25 09:14:08,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:08,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164536142] [2020-09-25 09:14:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:14:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:08,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:08,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:08,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:08,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:09,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:09,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:10,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:13,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:13,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 09:14:13,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:14:13,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-09-25 09:14:13,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:13,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:14:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-25 09:14:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-09-25 09:14:13,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:13,770 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 09:14:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:13,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:13,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:13,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 09:14:13,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:13,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 09:14:13,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:13,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:13,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:14,160 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 09:14:14,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164536142] [2020-09-25 09:14:14,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:14,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:14:14,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852169090] [2020-09-25 09:14:14,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:14:14,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:14,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:14:14,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:14:14,165 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-25 09:14:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:18,743 INFO L93 Difference]: Finished difference Result 5622 states and 7071 transitions. [2020-09-25 09:14:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:14:18,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-25 09:14:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:18,763 INFO L225 Difference]: With dead ends: 5622 [2020-09-25 09:14:18,763 INFO L226 Difference]: Without dead ends: 3786 [2020-09-25 09:14:18,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:14:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-09-25 09:14:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-09-25 09:14:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-09-25 09:14:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 4723 transitions. [2020-09-25 09:14:18,883 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 4723 transitions. Word has length 449 [2020-09-25 09:14:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:18,884 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 4723 transitions. [2020-09-25 09:14:18,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:14:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 4723 transitions. [2020-09-25 09:14:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-25 09:14:18,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:18,893 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] [2020-09-25 09:14:18,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:14:18,893 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1835563254, now seen corresponding path program 1 times [2020-09-25 09:14:18,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:18,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681479509] [2020-09-25 09:14:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:14:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:19,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:19,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:19,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:19,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:19,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:21,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:23,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:23,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:23,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-25 09:14:23,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:14:23,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 09:14:23,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:23,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:14:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-25 09:14:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 09:14:23,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:24,489 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 09:14:24,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:24,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:24,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:24,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 09:14:24,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:24,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 09:14:24,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:24,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:24,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:24,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:24,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:24,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:14:24,749 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 09:14:24,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681479509] [2020-09-25 09:14:24,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:24,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:14:24,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072026260] [2020-09-25 09:14:24,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:14:24,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:14:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:14:24,752 INFO L87 Difference]: Start difference. First operand 3784 states and 4723 transitions. Second operand 5 states. [2020-09-25 09:14:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:14:30,256 INFO L93 Difference]: Finished difference Result 10682 states and 13387 transitions. [2020-09-25 09:14:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:14:30,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 450 [2020-09-25 09:14:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:14:30,286 INFO L225 Difference]: With dead ends: 10682 [2020-09-25 09:14:30,286 INFO L226 Difference]: Without dead ends: 7117 [2020-09-25 09:14:30,295 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 09:14:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2020-09-25 09:14:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 7115. [2020-09-25 09:14:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7115 states. [2020-09-25 09:14:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 8859 transitions. [2020-09-25 09:14:30,519 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 8859 transitions. Word has length 450 [2020-09-25 09:14:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:14:30,520 INFO L479 AbstractCegarLoop]: Abstraction has 7115 states and 8859 transitions. [2020-09-25 09:14:30,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:14:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 8859 transitions. [2020-09-25 09:14:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-25 09:14:30,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:14:30,536 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] [2020-09-25 09:14:30,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:14:30,537 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:14:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:14:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1876842579, now seen corresponding path program 1 times [2020-09-25 09:14:30,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:14:30,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50242680] [2020-09-25 09:14:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY