/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_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:39:29,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:39:29,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:39:29,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:39:29,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:39:29,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:39:29,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:39:29,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:39:29,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:39:29,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:39:29,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:39:29,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:39:29,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:39:29,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:39:29,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:39:29,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:39:29,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:39:29,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:39:29,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:39:29,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:39:29,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:39:29,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:39:29,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:39:29,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:39:29,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:39:29,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:39:29,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:39:29,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:39:29,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:39:29,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:39:29,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:39:29,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:39:29,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:39:29,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:39:29,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:39:29,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:39:29,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:39:29,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:39:29,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:39:29,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:39:29,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:39:29,466 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 12:39:29,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:39:29,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:39:29,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:39:29,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:39:29,511 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:39:29,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:39:29,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:39:29,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:39:29,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:39:29,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:39:29,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:39:29,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:39:29,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:39:29,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:39:29,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:39:29,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:39:29,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:39:29,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:39:29,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:39:29,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:39:29,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:39:29,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:39:29,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:39:29,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:39:29,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:39:29,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:39:29,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:39:29,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:39:29,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:39:29,517 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 12:39:29,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:39:29,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:39:29,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:39:29,998 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:39:29,998 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:39:29,999 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:30,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd2ed6b7e/d372d3139c39400683f2becd9726c794/FLAG3e14f5d80 [2020-09-21 12:39:30,893 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:39:30,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:30,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd2ed6b7e/d372d3139c39400683f2becd9726c794/FLAG3e14f5d80 [2020-09-21 12:39:30,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd2ed6b7e/d372d3139c39400683f2becd9726c794 [2020-09-21 12:39:31,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:39:31,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:39:31,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:31,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:39:31,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:39:31,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:30" (1/1) ... [2020-09-21 12:39:31,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701ef800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:31, skipping insertion in model container [2020-09-21 12:39:31,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:39:30" (1/1) ... [2020-09-21 12:39:31,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:39:31,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:39:32,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:32,924 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:39:34,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:39:34,377 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:39:34,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34 WrapperNode [2020-09-21 12:39:34,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:39:34,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:39:34,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:39:34,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:39:34,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (1/1) ... [2020-09-21 12:39:34,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (1/1) ... [2020-09-21 12:39:34,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (1/1) ... [2020-09-21 12:39:34,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (1/1) ... [2020-09-21 12:39:34,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (1/1) ... [2020-09-21 12:39:34,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (1/1) ... [2020-09-21 12:39:34,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (1/1) ... [2020-09-21 12:39:34,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:39:34,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:39:34,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:39:34,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:39:34,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (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 12:39:34,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:39:34,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:39:34,751 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:39:34,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:39:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:39:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:39:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 12:39:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:39:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 12:39:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:39:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:39:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 12:39:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 12:39:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 12:39:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 12:39:34,754 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 12:39:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 12:39:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 12:39:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:39:34,755 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 12:39:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:39:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:39:34,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:39:39,567 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:39:39,567 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 12:39:39,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:39 BoogieIcfgContainer [2020-09-21 12:39:39,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:39:39,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:39:39,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:39:39,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:39:39,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:39:30" (1/3) ... [2020-09-21 12:39:39,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7af787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:39, skipping insertion in model container [2020-09-21 12:39:39,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:39:34" (2/3) ... [2020-09-21 12:39:39,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7af787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:39:39, skipping insertion in model container [2020-09-21 12:39:39,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:39:39" (3/3) ... [2020-09-21 12:39:39,591 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 12:39:39,603 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:39:39,615 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:39:39,639 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:39:39,677 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:39:39,677 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:39:39,677 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:39:39,678 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:39:39,678 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:39:39,678 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:39:39,678 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:39:39,678 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:39:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-09-21 12:39:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-09-21 12:39:39,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:39,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:39,765 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-09-21 12:39:39,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:39,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347802873] [2020-09-21 12:39:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:43,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:43,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 503 [2020-09-21 12:39:43,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2008 [2020-09-21 12:39:43,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:39:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-21 12:39:43,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 285 [2020-09-21 12:39:43,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:39:44,938 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-09-21 12:39:44,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:39:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:39:44,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:39:45,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:39:45,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:39:45,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:39:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-21 12:39:45,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:39:45,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:39:45,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:39:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:39:45,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:39:45,306 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 12:39:45,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347802873] [2020-09-21 12:39:45,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:39:45,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:39:45,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576537642] [2020-09-21 12:39:45,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:39:45,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:39:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:39:45,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:39:45,335 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-09-21 12:39:46,391 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-09-21 12:39:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:39:57,733 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-09-21 12:39:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:39:57,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-09-21 12:39:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:39:57,782 INFO L225 Difference]: With dead ends: 2488 [2020-09-21 12:39:57,782 INFO L226 Difference]: Without dead ends: 2186 [2020-09-21 12:39:57,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:39:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-09-21 12:39:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-09-21 12:39:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-09-21 12:39:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-09-21 12:39:58,012 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-09-21 12:39:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:39:58,014 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-09-21 12:39:58,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:39:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-09-21 12:39:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-09-21 12:39:58,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:39:58,027 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:39:58,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:39:58,028 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:39:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:39:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-09-21 12:39:58,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:39:58,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524735641] [2020-09-21 12:39:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:39:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:00,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:00,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:00,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 503 [2020-09-21 12:40:00,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:40:00,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1334 [2020-09-21 12:40:00,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:00,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:40:00,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:40:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-09-21 12:40:00,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:40:02,437 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 397 [2020-09-21 12:40:02,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:40:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:02,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:02,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:40:02,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:40:02,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-21 12:40:02,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:02,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:40:02,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:40:02,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:40:02,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:40:03,022 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 12:40:03,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524735641] [2020-09-21 12:40:03,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:40:03,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:40:03,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399009159] [2020-09-21 12:40:03,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:40:03,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:40:03,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:40:03,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:40:03,029 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2020-09-21 12:40:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:40:20,087 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2020-09-21 12:40:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:40:20,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-09-21 12:40:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:40:20,112 INFO L225 Difference]: With dead ends: 6476 [2020-09-21 12:40:20,113 INFO L226 Difference]: Without dead ends: 4309 [2020-09-21 12:40:20,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:40:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-09-21 12:40:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2020-09-21 12:40:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2020-09-21 12:40:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2020-09-21 12:40:20,297 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2020-09-21 12:40:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:40:20,298 INFO L479 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2020-09-21 12:40:20,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:40:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2020-09-21 12:40:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-09-21 12:40:20,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:40:20,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:40:20,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:40:20,317 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:40:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:40:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash 589891249, now seen corresponding path program 1 times [2020-09-21 12:40:20,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:40:20,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842973033] [2020-09-21 12:40:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:40:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:40:21,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:40:22,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:40:22,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-09-21 12:40:22,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:40:22,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-09-21 12:40:22,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:40:22,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:40:22,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:40:22,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-09-21 12:40:22,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1