/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:46:43,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:46:43,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:46:43,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:46:43,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:46:43,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:46:43,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:46:43,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:46:43,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:46:43,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:46:43,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:46:43,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:46:43,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:46:43,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:46:43,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:46:43,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:46:43,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:46:43,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:46:43,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:46:43,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:46:43,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:46:43,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:46:43,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:46:43,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:46:43,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:46:43,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:46:43,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:46:43,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:46:43,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:46:43,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:46:43,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:46:43,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:46:43,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:46:43,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:46:43,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:46:43,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:46:43,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:46:43,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:46:43,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:46:43,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:46:43,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:46:43,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 05:46:43,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:46:43,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:46:43,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:46:43,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:46:43,922 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:46:43,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:46:43,922 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:46:43,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:46:43,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:46:43,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:46:43,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:46:43,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:46:43,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:46:43,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:46:43,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:46:43,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:46:43,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:46:43,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:46:43,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:46:43,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:46:43,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:46:43,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:46:43,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:46:43,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:46:43,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:46:43,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:46:43,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:46:43,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:46:43,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:46:43,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:46:44,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:46:44,401 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:46:44,406 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:46:44,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:46:44,408 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:46:44,409 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:46:44,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/046663d39/d0abbfaf5f4f426d832572c386ef3941/FLAG3f328ae63 [2020-09-25 05:46:45,146 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:46:45,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:46:45,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/046663d39/d0abbfaf5f4f426d832572c386ef3941/FLAG3f328ae63 [2020-09-25 05:46:45,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/046663d39/d0abbfaf5f4f426d832572c386ef3941 [2020-09-25 05:46:45,416 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:46:45,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:46:45,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:45,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:46:45,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:46:45,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:45" (1/1) ... [2020-09-25 05:46:45,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c2ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:45, skipping insertion in model container [2020-09-25 05:46:45,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:45" (1/1) ... [2020-09-25 05:46:45,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:46:45,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:46:46,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:46,147 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:46:46,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:46,331 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:46:46,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46 WrapperNode [2020-09-25 05:46:46,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:46,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:46:46,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:46:46,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:46:46,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... [2020-09-25 05:46:46,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:46:46,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:46:46,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:46:46,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:46:46,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:46:46,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:46:46,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:46:46,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:46:46,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:46:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:46:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 05:46:46,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 05:46:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 05:46:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 05:46:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:46:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:46:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 05:46:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 05:46:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 05:46:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 05:46:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 05:46:46,539 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 05:46:46,540 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 05:46:46,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:46:46,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:46:46,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:46:48,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:46:48,227 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:46:48,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:48 BoogieIcfgContainer [2020-09-25 05:46:48,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:46:48,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:46:48,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:46:48,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:46:48,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:46:45" (1/3) ... [2020-09-25 05:46:48,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bab8b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:48, skipping insertion in model container [2020-09-25 05:46:48,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:46" (2/3) ... [2020-09-25 05:46:48,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bab8b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:48, skipping insertion in model container [2020-09-25 05:46:48,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:48" (3/3) ... [2020-09-25 05:46:48,252 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:46:48,265 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:46:48,282 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:46:48,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:46:48,345 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:46:48,345 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:46:48,345 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:46:48,345 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:46:48,346 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:46:48,346 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:46:48,346 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:46:48,346 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:46:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-25 05:46:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 05:46:48,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:48,429 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 05:46:48,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-25 05:46:48,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:48,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259244123] [2020-09-25 05:46:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:49,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:49,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:49,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:53,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:54,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:54,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 05:46:54,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:46:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 05:46:54,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:54,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:54,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:46:54,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 200 [2020-09-25 05:46:54,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 05:46:54,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:46:54,977 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 05:46:54,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:55,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:55,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 05:46:55,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:55,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-25 05:46:55,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:55,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:55,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:46:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:46:55,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259244123] [2020-09-25 05:46:55,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:55,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:46:55,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714860445] [2020-09-25 05:46:55,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:46:55,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:46:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:55,606 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 4 states. [2020-09-25 05:46:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:46:59,517 INFO L93 Difference]: Finished difference Result 1657 states and 2169 transitions. [2020-09-25 05:46:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:46:59,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 05:46:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:46:59,570 INFO L225 Difference]: With dead ends: 1657 [2020-09-25 05:46:59,571 INFO L226 Difference]: Without dead ends: 1241 [2020-09-25 05:46:59,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-25 05:46:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1234. [2020-09-25 05:46:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-25 05:46:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1513 transitions. [2020-09-25 05:46:59,733 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1513 transitions. Word has length 449 [2020-09-25 05:46:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:46:59,739 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1513 transitions. [2020-09-25 05:46:59,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:46:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1513 transitions. [2020-09-25 05:46:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 05:46:59,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:59,750 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 05:46:59,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:46:59,751 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:59,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1248222459, now seen corresponding path program 1 times [2020-09-25 05:46:59,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:59,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021489801] [2020-09-25 05:46:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:59,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:00,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:03,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:03,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:04,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:04,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 05:47:04,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:47:04,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-09-25 05:47:04,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:04,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:04,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:47:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 201 [2020-09-25 05:47:04,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 05:47:04,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 05:47:05,380 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 05:47:05,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:05,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:05,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:05,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 05:47:05,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:05,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-25 05:47:05,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:05,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:05,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:05,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:05,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:05,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021489801] [2020-09-25 05:47:05,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:05,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:47:05,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093602811] [2020-09-25 05:47:05,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:47:05,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:47:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:05,929 INFO L87 Difference]: Start difference. First operand 1234 states and 1513 transitions. Second operand 4 states. [2020-09-25 05:47:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:09,077 INFO L93 Difference]: Finished difference Result 2498 states and 3152 transitions. [2020-09-25 05:47:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:47:09,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-09-25 05:47:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:09,089 INFO L225 Difference]: With dead ends: 2498 [2020-09-25 05:47:09,090 INFO L226 Difference]: Without dead ends: 2052 [2020-09-25 05:47:09,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-09-25 05:47:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2040. [2020-09-25 05:47:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2040 states. [2020-09-25 05:47:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2543 transitions. [2020-09-25 05:47:09,157 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2543 transitions. Word has length 449 [2020-09-25 05:47:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:09,158 INFO L479 AbstractCegarLoop]: Abstraction has 2040 states and 2543 transitions. [2020-09-25 05:47:09,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:47:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2543 transitions. [2020-09-25 05:47:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 05:47:09,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:09,170 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 05:47:09,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:47:09,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:09,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1103013733, now seen corresponding path program 1 times [2020-09-25 05:47:09,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:09,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720799681] [2020-09-25 05:47:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:09,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:09,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:09,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:09,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:10,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:10,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:14,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:14,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:14,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 05:47:14,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:47:14,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 05:47:14,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:14,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:14,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:47:14,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-25 05:47:14,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-09-25 05:47:14,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:14,704 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 05:47:14,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:14,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:14,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:14,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 05:47:14,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:14,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 05:47:14,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:14,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:14,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:14,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:14,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:14,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:15,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720799681] [2020-09-25 05:47:15,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:15,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:47:15,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688434732] [2020-09-25 05:47:15,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:47:15,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:15,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:47:15,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:47:15,173 INFO L87 Difference]: Start difference. First operand 2040 states and 2543 transitions. Second operand 5 states. [2020-09-25 05:47:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:19,658 INFO L93 Difference]: Finished difference Result 5622 states and 7071 transitions. [2020-09-25 05:47:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:47:19,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-25 05:47:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:19,678 INFO L225 Difference]: With dead ends: 5622 [2020-09-25 05:47:19,678 INFO L226 Difference]: Without dead ends: 3786 [2020-09-25 05:47:19,683 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 05:47:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-09-25 05:47:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-09-25 05:47:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-09-25 05:47:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 4723 transitions. [2020-09-25 05:47:19,798 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 4723 transitions. Word has length 449 [2020-09-25 05:47:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:19,799 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 4723 transitions. [2020-09-25 05:47:19,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:47:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 4723 transitions. [2020-09-25 05:47:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-25 05:47:19,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:19,808 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 05:47:19,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:47:19,809 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1835563254, now seen corresponding path program 1 times [2020-09-25 05:47:19,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:19,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938736293] [2020-09-25 05:47:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:19,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:20,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:20,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:20,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:20,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:21,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:21,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:24,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:24,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:24,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-25 05:47:24,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:47:24,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-09-25 05:47:24,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:24,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:47:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-09-25 05:47:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 05:47:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:25,263 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 05:47:25,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:25,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:25,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:25,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 05:47:25,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:25,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 05:47:25,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:25,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:25,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:25,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:25,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:25,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:25,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938736293] [2020-09-25 05:47:25,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:25,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:47:25,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011220872] [2020-09-25 05:47:25,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:47:25,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:25,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:47:25,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:25,459 INFO L87 Difference]: Start difference. First operand 3784 states and 4723 transitions. Second operand 4 states. [2020-09-25 05:47:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:29,738 INFO L93 Difference]: Finished difference Result 10776 states and 13519 transitions. [2020-09-25 05:47:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:47:29,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2020-09-25 05:47:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:29,768 INFO L225 Difference]: With dead ends: 10776 [2020-09-25 05:47:29,769 INFO L226 Difference]: Without dead ends: 7331 [2020-09-25 05:47:29,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2020-09-25 05:47:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 3787. [2020-09-25 05:47:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3787 states. [2020-09-25 05:47:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 4727 transitions. [2020-09-25 05:47:29,921 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 4727 transitions. Word has length 450 [2020-09-25 05:47:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:29,922 INFO L479 AbstractCegarLoop]: Abstraction has 3787 states and 4727 transitions. [2020-09-25 05:47:29,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:47:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 4727 transitions. [2020-09-25 05:47:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-25 05:47:29,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:29,930 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 05:47:29,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:47:29,930 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1682956299, now seen corresponding path program 1 times [2020-09-25 05:47:29,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:29,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207985672] [2020-09-25 05:47:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:30,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:30,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:30,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:31,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking...