/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:38:25,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:38:25,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:38:25,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:38:25,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:38:25,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:38:25,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:38:25,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:38:25,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:38:25,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:38:25,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:38:25,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:38:25,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:38:25,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:38:25,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:38:25,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:38:25,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:38:25,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:38:25,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:38:25,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:38:25,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:38:25,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:38:25,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:38:25,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:38:25,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:38:25,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:38:25,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:38:25,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:38:25,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:38:25,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:38:25,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:38:25,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:38:25,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:38:25,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:38:25,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:38:25,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:38:25,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:38:25,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:38:25,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:38:25,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:38:25,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:38:25,366 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 [2020-09-21 12:38:25,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:38:25,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:38:25,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:38:25,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:38:25,401 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:38:25,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:38:25,401 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:38:25,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:38:25,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:38:25,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:38:25,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:38:25,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:38:25,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:38:25,404 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:38:25,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:38:25,404 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:38:25,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:38:25,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:38:25,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:38:25,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:38:25,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:38:25,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:38:25,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:38:25,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:38:25,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:38:25,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:38:25,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:38:25,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:38:25,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:38:25,409 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:38:25,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:38:25,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:38:25,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:38:25,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:38:25,933 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:38:25,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:26,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58b8bcd50/a5ae192fa3454fe1935d3111a53bb7ea/FLAG1ad61b4d4 [2020-09-21 12:38:26,798 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:38:26,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:26,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58b8bcd50/a5ae192fa3454fe1935d3111a53bb7ea/FLAG1ad61b4d4 [2020-09-21 12:38:26,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58b8bcd50/a5ae192fa3454fe1935d3111a53bb7ea [2020-09-21 12:38:26,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:38:26,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:38:26,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:26,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:38:26,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:38:26,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:26" (1/1) ... [2020-09-21 12:38:26,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f61d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:26, skipping insertion in model container [2020-09-21 12:38:26,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:26" (1/1) ... [2020-09-21 12:38:26,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:38:27,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:38:28,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:38:28,617 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:38:30,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:38:30,153 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:38:30,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30 WrapperNode [2020-09-21 12:38:30,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:38:30,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:38:30,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:38:30,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:38:30,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (1/1) ... [2020-09-21 12:38:30,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (1/1) ... [2020-09-21 12:38:30,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (1/1) ... [2020-09-21 12:38:30,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (1/1) ... [2020-09-21 12:38:30,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (1/1) ... [2020-09-21 12:38:30,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (1/1) ... [2020-09-21 12:38:30,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (1/1) ... [2020-09-21 12:38:30,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:38:30,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:38:30,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:38:30,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:38:30,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (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 [2020-09-21 12:38:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:38:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:38:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:38:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:38:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:38:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:38:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:38:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:38:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:38:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:38:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:38:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:38:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:38:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:38:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:38:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:38:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:38:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 12:38:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:38:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:38:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:38:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:38:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:38:34,781 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:38:34,782 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:38:34,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:34 BoogieIcfgContainer [2020-09-21 12:38:34,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:38:34,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:38:34,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:38:34,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:38:34,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:38:26" (1/3) ... [2020-09-21 12:38:34,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8552a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:34, skipping insertion in model container [2020-09-21 12:38:34,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:30" (2/3) ... [2020-09-21 12:38:34,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8552a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:34, skipping insertion in model container [2020-09-21 12:38:34,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:34" (3/3) ... [2020-09-21 12:38:34,814 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:38:34,826 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:38:34,843 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:38:34,868 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:38:34,908 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:38:34,908 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:38:34,908 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:38:34,909 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:38:34,909 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:38:34,909 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:38:34,909 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:38:34,909 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:38:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-09-21 12:38:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-21 12:38:35,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:35,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:38:35,004 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-09-21 12:38:35,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:35,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814467706] [2020-09-21 12:38:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:37,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:37,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-09-21 12:38:37,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:37,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1230 [2020-09-21 12:38:37,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:38:37,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-21 12:38:37,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-09-21 12:38:37,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:38:39,173 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-09-21 12:38:39,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:39,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:39,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:39,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:39,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-21 12:38:39,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:39,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:38:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:38:39,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814467706] [2020-09-21 12:38:39,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:39,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:38:39,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452402721] [2020-09-21 12:38:39,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:38:39,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:39,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:38:39,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:38:39,680 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-09-21 12:38:40,531 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-09-21 12:38:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:38:50,736 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-09-21 12:38:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:38:50,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-09-21 12:38:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:38:50,784 INFO L225 Difference]: With dead ends: 2262 [2020-09-21 12:38:50,785 INFO L226 Difference]: Without dead ends: 1993 [2020-09-21 12:38:50,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-09-21 12:38:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-09-21 12:38:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-09-21 12:38:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-09-21 12:38:50,981 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-09-21 12:38:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:38:50,983 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-09-21 12:38:50,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:38:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-09-21 12:38:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-21 12:38:50,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:38:50,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:38:50,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:38:50,999 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:38:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:38:51,000 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-09-21 12:38:51,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:38:51,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796685594] [2020-09-21 12:38:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:38:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:56,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:56,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-09-21 12:38:56,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:56,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3212 [2020-09-21 12:38:56,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:38:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:38:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-21 12:38:56,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:57,764 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 382 [2020-09-21 12:38:57,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:38:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:38:57,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:38:57,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:38:57,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:38:57,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:38:57,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-21 12:38:57,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:38:57,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:38:57,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:38:57,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:38:57,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:38:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:38:58,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796685594] [2020-09-21 12:38:58,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:38:58,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:38:58,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814278527] [2020-09-21 12:38:58,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:38:58,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:38:58,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:38:58,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:38:58,336 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-09-21 12:39:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:15,818 INFO L93 Difference]: Finished difference Result 5806 states and 9395 transitions. [2020-09-21 12:39:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:15,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-09-21 12:39:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:15,841 INFO L225 Difference]: With dead ends: 5806 [2020-09-21 12:39:15,842 INFO L226 Difference]: Without dead ends: 3930 [2020-09-21 12:39:15,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:39:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-09-21 12:39:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-09-21 12:39:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-09-21 12:39:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6352 transitions. [2020-09-21 12:39:16,050 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6352 transitions. Word has length 476 [2020-09-21 12:39:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:16,051 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6352 transitions. [2020-09-21 12:39:16,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:39:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6352 transitions. [2020-09-21 12:39:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-09-21 12:39:16,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:16,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:16,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:39:16,077 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:16,078 INFO L82 PathProgramCache]: Analyzing trace with hash 180464294, now seen corresponding path program 1 times [2020-09-21 12:39:16,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:16,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530909942] [2020-09-21 12:39:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:16,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:17,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:17,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:17,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-09-21 12:39:17,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:39:17,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-09-21 12:39:17,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:17,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:17,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-21 12:39:17,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-09-21 12:39:17,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1