/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:07:35,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:07:35,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:07:35,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:07:35,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:07:35,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:07:35,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:07:35,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:07:35,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:07:35,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:07:35,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:07:35,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:07:35,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:07:35,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:07:35,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:07:35,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:07:35,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:07:35,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:07:35,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:07:35,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:07:35,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:07:35,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:07:35,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:07:35,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:07:35,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:07:35,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:07:35,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:07:35,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:07:35,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:07:35,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:07:35,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:07:35,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:07:35,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:07:35,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:07:35,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:07:35,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:07:35,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:07:35,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:07:35,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:07:35,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:07:35,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:07:35,815 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 00:07:35,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:07:35,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:07:35,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:07:35,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:07:35,864 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:07:35,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:07:35,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:07:35,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:07:35,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:07:35,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:07:35,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:07:35,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:07:35,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:07:35,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:07:35,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:07:35,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:07:35,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:07:35,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:07:35,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:07:35,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:07:35,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:07:35,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:07:35,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:07:35,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:07:35,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:07:35,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:07:35,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:07:35,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:07:35,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:07:35,871 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:07:36,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:07:36,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:07:36,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:07:36,365 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:07:36,365 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:07:36,366 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 00:07:36,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb70017f7/73e6af6d72b94bc8b26ad59cd9a9d857/FLAG8c988559f [2020-09-25 00:07:37,075 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:07:37,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 00:07:37,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb70017f7/73e6af6d72b94bc8b26ad59cd9a9d857/FLAG8c988559f [2020-09-25 00:07:37,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb70017f7/73e6af6d72b94bc8b26ad59cd9a9d857 [2020-09-25 00:07:37,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:07:37,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:07:37,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:07:37,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:07:37,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:07:37,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:07:37" (1/1) ... [2020-09-25 00:07:37,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5d3184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:37, skipping insertion in model container [2020-09-25 00:07:37,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:07:37" (1/1) ... [2020-09-25 00:07:37,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:07:37,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:07:38,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:07:38,125 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:07:38,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:07:38,344 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:07:38,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38 WrapperNode [2020-09-25 00:07:38,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:07:38,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:07:38,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:07:38,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:07:38,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (1/1) ... [2020-09-25 00:07:38,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (1/1) ... [2020-09-25 00:07:38,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (1/1) ... [2020-09-25 00:07:38,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (1/1) ... [2020-09-25 00:07:38,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (1/1) ... [2020-09-25 00:07:38,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (1/1) ... [2020-09-25 00:07:38,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (1/1) ... [2020-09-25 00:07:38,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:07:38,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:07:38,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:07:38,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:07:38,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (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 00:07:38,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:07:38,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:07:38,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:07:38,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:07:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:07:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 00:07:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 00:07:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 00:07:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 00:07:38,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:07:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:07:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 00:07:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 00:07:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 00:07:38,564 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 00:07:38,565 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 00:07:38,566 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 00:07:38,566 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 00:07:38,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:07:38,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:07:38,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:07:40,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:07:40,304 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 00:07:40,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:07:40 BoogieIcfgContainer [2020-09-25 00:07:40,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:07:40,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:07:40,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:07:40,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:07:40,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:07:37" (1/3) ... [2020-09-25 00:07:40,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53385395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:07:40, skipping insertion in model container [2020-09-25 00:07:40,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:07:38" (2/3) ... [2020-09-25 00:07:40,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53385395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:07:40, skipping insertion in model container [2020-09-25 00:07:40,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:07:40" (3/3) ... [2020-09-25 00:07:40,327 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 00:07:40,340 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:07:40,352 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:07:40,377 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:07:40,415 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:07:40,416 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:07:40,416 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:07:40,416 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:07:40,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:07:40,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:07:40,416 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:07:40,417 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:07:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 00:07:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 00:07:40,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:07:40,492 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] [2020-09-25 00:07:40,493 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:07:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:07:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 00:07:40,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:07:40,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210474789] [2020-09-25 00:07:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:07:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:42,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:42,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:44,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:45,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:46,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:46,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 00:07:46,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:07:46,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 00:07:46,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:07:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-25 00:07:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 00:07:46,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:07:46,723 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 00:07:46,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:07:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:46,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:46,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:46,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:07:46,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:07:46,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 00:07:46,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:07:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:07:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:07:46,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:07:47,243 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 00:07:47,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210474789] [2020-09-25 00:07:47,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:07:47,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:07:47,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473803518] [2020-09-25 00:07:47,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:07:47,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:07:47,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:07:47,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:07:47,288 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 00:07:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:07:52,493 INFO L93 Difference]: Finished difference Result 2066 states and 2749 transitions. [2020-09-25 00:07:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:07:52,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 00:07:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:07:52,540 INFO L225 Difference]: With dead ends: 2066 [2020-09-25 00:07:52,540 INFO L226 Difference]: Without dead ends: 1236 [2020-09-25 00:07:52,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:07:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-09-25 00:07:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1234. [2020-09-25 00:07:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-25 00:07:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1502 transitions. [2020-09-25 00:07:52,701 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1502 transitions. Word has length 407 [2020-09-25 00:07:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:07:52,703 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1502 transitions. [2020-09-25 00:07:52,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:07:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1502 transitions. [2020-09-25 00:07:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 00:07:52,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:07:52,711 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] [2020-09-25 00:07:52,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:07:52,712 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:07:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:07:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1024696889, now seen corresponding path program 1 times [2020-09-25 00:07:52,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:07:52,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249683362] [2020-09-25 00:07:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:07:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:52,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:52,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:53,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:54,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:54,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:57,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:57,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 00:07:57,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:07:57,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 00:07:57,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:57,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:07:57,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 00:07:57,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 00:07:57,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:07:58,264 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 00:07:58,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:07:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:07:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:07:58,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:07:58,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:07:58,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:07:58,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 00:07:58,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:07:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:07:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:07:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:07:58,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:07:58,753 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 00:07:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249683362] [2020-09-25 00:07:58,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:07:58,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:07:58,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006616516] [2020-09-25 00:07:58,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:07:58,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:07:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:07:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:07:58,762 INFO L87 Difference]: Start difference. First operand 1234 states and 1502 transitions. Second operand 5 states. [2020-09-25 00:08:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:08:03,791 INFO L93 Difference]: Finished difference Result 3263 states and 4026 transitions. [2020-09-25 00:08:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:08:03,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2020-09-25 00:08:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:08:03,807 INFO L225 Difference]: With dead ends: 3263 [2020-09-25 00:08:03,807 INFO L226 Difference]: Without dead ends: 2235 [2020-09-25 00:08:03,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:08:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-09-25 00:08:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2233. [2020-09-25 00:08:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2233 states. [2020-09-25 00:08:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 2734 transitions. [2020-09-25 00:08:03,918 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 2734 transitions. Word has length 408 [2020-09-25 00:08:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:08:03,920 INFO L479 AbstractCegarLoop]: Abstraction has 2233 states and 2734 transitions. [2020-09-25 00:08:03,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:08:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 2734 transitions. [2020-09-25 00:08:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 00:08:03,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:08:03,937 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] [2020-09-25 00:08:03,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:08:03,937 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:08:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:08:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-25 00:08:03,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:08:03,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906622309] [2020-09-25 00:08:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:08:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:08:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:04,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:04,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:05,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:05,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:06,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:07,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:07,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:09,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:08:09,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 00:08:09,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:08:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-09-25 00:08:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:08:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:08:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-25 00:08:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-25 00:08:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:08:09,581 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 00:08:09,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:08:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:08:09,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:09,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:08:09,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:08:09,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:08:09,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 00:08:09,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:08:09,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:08:09,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:08:09,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:08:09,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:08:09,922 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 00:08:09,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906622309] [2020-09-25 00:08:09,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:08:09,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:08:09,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461732759] [2020-09-25 00:08:09,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:08:09,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:08:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:08:09,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:08:09,931 INFO L87 Difference]: Start difference. First operand 2233 states and 2734 transitions. Second operand 5 states. [2020-09-25 00:08:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:08:14,241 INFO L93 Difference]: Finished difference Result 6105 states and 7516 transitions. [2020-09-25 00:08:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:08:14,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 00:08:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:08:14,262 INFO L225 Difference]: With dead ends: 6105 [2020-09-25 00:08:14,262 INFO L226 Difference]: Without dead ends: 4111 [2020-09-25 00:08:14,266 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 00:08:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2020-09-25 00:08:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4109. [2020-09-25 00:08:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4109 states. [2020-09-25 00:08:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 5020 transitions. [2020-09-25 00:08:14,418 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 5020 transitions. Word has length 409 [2020-09-25 00:08:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:08:14,419 INFO L479 AbstractCegarLoop]: Abstraction has 4109 states and 5020 transitions. [2020-09-25 00:08:14,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:08:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 5020 transitions. [2020-09-25 00:08:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-25 00:08:14,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:08:14,432 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] [2020-09-25 00:08:14,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:08:14,433 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:08:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:08:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1907351519, now seen corresponding path program 1 times [2020-09-25 00:08:14,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:08:14,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066494098] [2020-09-25 00:08:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:08:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:08:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:14,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:15,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:15,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:15,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:15,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:17,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:17,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:17,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:18,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:19,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:08:19,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-25 00:08:19,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 00:08:19,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-09-25 00:08:19,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:08:19,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:08:19,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-09-25 00:08:19,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-25 00:08:19,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:08:19,948 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 00:08:19,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:08:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:08:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:08:19,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:08:19,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:08:19,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:08:19,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 00:08:19,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:08:19,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:08:19,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:08:19,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:08:20,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:08:20,304 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 00:08:20,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066494098] [2020-09-25 00:08:20,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:08:20,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 00:08:20,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136503369] [2020-09-25 00:08:20,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:08:20,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:08:20,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:08:20,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:08:20,309 INFO L87 Difference]: Start difference. First operand 4109 states and 5020 transitions. Second operand 5 states.