/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:13:16,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:13:16,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:13:16,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:13:16,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:13:16,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:13:16,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:13:16,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:13:16,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:13:16,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:13:16,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:13:16,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:13:16,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:13:16,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:13:16,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:13:16,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:13:16,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:13:16,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:13:16,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:13:16,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:13:16,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:13:16,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:13:16,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:13:16,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:13:16,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:13:16,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:13:16,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:13:16,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:13:16,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:13:16,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:13:16,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:13:16,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:13:16,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:13:16,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:13:16,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:13:16,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:13:16,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:13:16,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:13:16,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:13:16,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:13:16,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:13:16,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:13:16,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:13:16,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:13:16,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:13:16,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:13:16,162 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:13:16,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:13:16,162 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:13:16,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:13:16,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:13:16,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:13:16,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:13:16,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:13:16,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:13:16,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:13:16,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:13:16,164 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:13:16,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:13:16,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:13:16,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:13:16,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:13:16,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:13:16,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:13:16,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:13:16,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:13:16,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:13:16,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:13:16,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:13:16,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:13:16,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:13:16,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:13:16,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:13:16,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:13:16,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:13:16,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:13:16,682 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:13:16,683 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:16,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/637594154/0dbbc9de21ef4b4cba28dd29a767298a/FLAGed71ddb12 [2020-09-25 09:13:17,426 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:13:17,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:17,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/637594154/0dbbc9de21ef4b4cba28dd29a767298a/FLAGed71ddb12 [2020-09-25 09:13:17,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/637594154/0dbbc9de21ef4b4cba28dd29a767298a [2020-09-25 09:13:17,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:13:17,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:13:17,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:17,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:13:17,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:13:17,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:17" (1/1) ... [2020-09-25 09:13:17,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434f45a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:17, skipping insertion in model container [2020-09-25 09:13:17,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:13:17" (1/1) ... [2020-09-25 09:13:17,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:13:17,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:13:18,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:18,400 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:13:18,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:13:18,593 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:13:18,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18 WrapperNode [2020-09-25 09:13:18,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:13:18,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:13:18,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:13:18,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:13:18,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... [2020-09-25 09:13:18,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... [2020-09-25 09:13:18,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... [2020-09-25 09:13:18,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... [2020-09-25 09:13:18,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... [2020-09-25 09:13:18,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... [2020-09-25 09:13:18,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... [2020-09-25 09:13:18,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:13:18,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:13:18,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:13:18,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:13:18,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:13:18,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:13:18,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:13:18,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:13:18,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:13:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:13:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 09:13:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 09:13:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 09:13:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 09:13:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:13:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:13:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 09:13:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 09:13:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 09:13:18,807 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 09:13:18,808 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 09:13:18,808 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 09:13:18,808 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 09:13:18,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:13:18,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:13:18,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:13:20,606 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:13:20,607 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:13:20,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:20 BoogieIcfgContainer [2020-09-25 09:13:20,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:13:20,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:13:20,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:13:20,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:13:20,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:13:17" (1/3) ... [2020-09-25 09:13:20,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686b777f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:20, skipping insertion in model container [2020-09-25 09:13:20,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:13:18" (2/3) ... [2020-09-25 09:13:20,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686b777f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:13:20, skipping insertion in model container [2020-09-25 09:13:20,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:13:20" (3/3) ... [2020-09-25 09:13:20,645 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 09:13:20,657 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:13:20,669 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:13:20,692 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:13:20,729 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:13:20,729 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:13:20,729 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:13:20,729 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:13:20,730 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:13:20,730 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:13:20,730 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:13:20,730 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:13:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 09:13:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 09:13:20,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:20,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:13:20,808 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:20,817 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 09:13:20,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:20,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743960816] [2020-09-25 09:13:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:22,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:25,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:26,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:26,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:26,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 09:13:26,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:13:26,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-09-25 09:13:26,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:26,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:13:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 09:13:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 09:13:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:13:27,264 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 09:13:27,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:27,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:27,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:27,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 09:13:27,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:27,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 09:13:27,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:27,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:27,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:13:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:13:27,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743960816] [2020-09-25 09:13:27,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:27,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:13:27,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496178021] [2020-09-25 09:13:27,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:13:27,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:27,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:13:27,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:13:27,922 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 09:13:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:33,451 INFO L93 Difference]: Finished difference Result 2068 states and 2752 transitions. [2020-09-25 09:13:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:13:33,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 09:13:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:33,501 INFO L225 Difference]: With dead ends: 2068 [2020-09-25 09:13:33,501 INFO L226 Difference]: Without dead ends: 1234 [2020-09-25 09:13:33,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:13:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-25 09:13:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-25 09:13:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-25 09:13:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1499 transitions. [2020-09-25 09:13:33,645 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1499 transitions. Word has length 407 [2020-09-25 09:13:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:33,647 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1499 transitions. [2020-09-25 09:13:33,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:13:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1499 transitions. [2020-09-25 09:13:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 09:13:33,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:33,661 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 09:13:33,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:13:33,661 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:33,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1185743993, now seen corresponding path program 1 times [2020-09-25 09:13:33,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:33,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321984483] [2020-09-25 09:13:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:33,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:34,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:36,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:37,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:38,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:38,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 09:13:38,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:13:38,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 09:13:38,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:38,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:38,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:13:38,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-25 09:13:38,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-25 09:13:38,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:39,181 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 09:13:39,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:39,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:39,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 09:13:39,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:39,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 09:13:39,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:39,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:39,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:39,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:39,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:39,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:13:39,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321984483] [2020-09-25 09:13:39,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:39,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:13:39,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106104717] [2020-09-25 09:13:39,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:13:39,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:39,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:13:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:13:39,748 INFO L87 Difference]: Start difference. First operand 1232 states and 1499 transitions. Second operand 5 states. [2020-09-25 09:13:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:44,828 INFO L93 Difference]: Finished difference Result 3229 states and 3979 transitions. [2020-09-25 09:13:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:13:44,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2020-09-25 09:13:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:44,851 INFO L225 Difference]: With dead ends: 3229 [2020-09-25 09:13:44,851 INFO L226 Difference]: Without dead ends: 2231 [2020-09-25 09:13:44,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:13:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-09-25 09:13:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2229. [2020-09-25 09:13:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2229 states. [2020-09-25 09:13:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2728 transitions. [2020-09-25 09:13:45,018 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2728 transitions. Word has length 408 [2020-09-25 09:13:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:45,021 INFO L479 AbstractCegarLoop]: Abstraction has 2229 states and 2728 transitions. [2020-09-25 09:13:45,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:13:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2728 transitions. [2020-09-25 09:13:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 09:13:45,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:45,033 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 09:13:45,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:13:45,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-25 09:13:45,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:45,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837325402] [2020-09-25 09:13:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:45,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:46,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:46,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:47,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:47,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:48,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:50,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:50,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 09:13:50,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 09:13:50,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 09:13:50,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:50,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:50,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:13:50,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-25 09:13:50,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-09-25 09:13:50,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:50,726 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 09:13:50,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:13:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:50,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:50,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:13:50,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 09:13:50,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:13:50,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 09:13:50,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:13:50,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:13:50,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:13:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:13:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:13:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:13:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:13:51,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837325402] [2020-09-25 09:13:51,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:13:51,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:13:51,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338866154] [2020-09-25 09:13:51,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:13:51,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:13:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:13:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:13:51,101 INFO L87 Difference]: Start difference. First operand 2229 states and 2728 transitions. Second operand 5 states. [2020-09-25 09:13:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:13:55,834 INFO L93 Difference]: Finished difference Result 5684 states and 6998 transitions. [2020-09-25 09:13:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:13:55,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 09:13:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:13:55,854 INFO L225 Difference]: With dead ends: 5684 [2020-09-25 09:13:55,854 INFO L226 Difference]: Without dead ends: 4086 [2020-09-25 09:13:55,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:13:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2020-09-25 09:13:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 4084. [2020-09-25 09:13:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4084 states. [2020-09-25 09:13:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 4988 transitions. [2020-09-25 09:13:56,042 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 4988 transitions. Word has length 409 [2020-09-25 09:13:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:13:56,048 INFO L479 AbstractCegarLoop]: Abstraction has 4084 states and 4988 transitions. [2020-09-25 09:13:56,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:13:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 4988 transitions. [2020-09-25 09:13:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-25 09:13:56,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:13:56,061 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 09:13:56,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:13:56,061 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:13:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:13:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash 325014321, now seen corresponding path program 1 times [2020-09-25 09:13:56,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:13:56,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417627144] [2020-09-25 09:13:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:13:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:13:56,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:56,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:56,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:56,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:57,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:13:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:00,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:01,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:01,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-25 09:14:01,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 09:14:01,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 09:14:01,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:01,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 09:14:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-25 09:14:01,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-09-25 09:14:01,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:14:01,568 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 09:14:01,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:14:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:14:01,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:14:01,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:14:01,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 09:14:01,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:14:01,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 09:14:01,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:14:01,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:14:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:14:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:14:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:14:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:14:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:14:01,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417627144] [2020-09-25 09:14:01,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:14:01,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:14:01,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671998637] [2020-09-25 09:14:01,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:14:01,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:14:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:14:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:14:01,915 INFO L87 Difference]: Start difference. First operand 4084 states and 4988 transitions. Second operand 5 states.