/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:13:25,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:13:25,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:13:25,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:13:25,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:13:25,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:13:25,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:13:25,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:13:25,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:13:25,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:13:25,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:13:25,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:13:25,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:13:25,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:13:25,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:13:25,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:13:25,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:13:25,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:13:25,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:13:25,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:13:25,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:13:25,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:13:25,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:13:25,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:13:25,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:13:25,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:13:25,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:13:25,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:13:25,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:13:25,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:13:25,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:13:25,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:13:25,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:13:25,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:13:25,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:13:25,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:13:25,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:13:25,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:13:25,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:13:25,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:13:25,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:13:25,664 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 [2020-09-24 16:13:25,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:13:25,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:13:25,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:13:25,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:13:25,713 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:13:25,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:13:25,713 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:13:25,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:13:25,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:13:25,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:13:25,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:13:25,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:13:25,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:13:25,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:13:25,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:13:25,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:13:25,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:13:25,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:13:25,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:13:25,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:13:25,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:13:25,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:13:25,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:13:25,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:13:25,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:13:25,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:13:25,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:13:25,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:13:25,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:13:25,719 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:13:26,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:13:26,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:13:26,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:13:26,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:13:26,187 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:13:26,189 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 16:13:26,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35c2eb328/92c9d0ba90d04f4994742cacbb52a5ef/FLAGb864f479f [2020-09-24 16:13:27,060 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:13:27,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 16:13:27,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35c2eb328/92c9d0ba90d04f4994742cacbb52a5ef/FLAGb864f479f [2020-09-24 16:13:27,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35c2eb328/92c9d0ba90d04f4994742cacbb52a5ef [2020-09-24 16:13:27,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:13:27,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:13:27,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:13:27,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:13:27,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:13:27,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:13:27" (1/1) ... [2020-09-24 16:13:27,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b4f038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:27, skipping insertion in model container [2020-09-24 16:13:27,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:13:27" (1/1) ... [2020-09-24 16:13:27,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:13:27,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:13:28,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:13:28,931 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:13:29,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:13:29,873 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:13:29,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29 WrapperNode [2020-09-24 16:13:29,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:13:29,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:13:29,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:13:29,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:13:29,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (1/1) ... [2020-09-24 16:13:29,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (1/1) ... [2020-09-24 16:13:29,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (1/1) ... [2020-09-24 16:13:29,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (1/1) ... [2020-09-24 16:13:30,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (1/1) ... [2020-09-24 16:13:30,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (1/1) ... [2020-09-24 16:13:30,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (1/1) ... [2020-09-24 16:13:30,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:13:30,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:13:30,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:13:30,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:13:30,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (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 [2020-09-24 16:13:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:13:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:13:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 16:13:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:13:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:13:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 16:13:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 16:13:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 16:13:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 16:13:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 16:13:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 16:13:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 16:13:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 16:13:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 16:13:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 16:13:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 16:13:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-24 16:13:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 16:13:30,233 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 16:13:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:13:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:13:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:13:34,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:13:34,935 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 16:13:34,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:13:34 BoogieIcfgContainer [2020-09-24 16:13:34,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:13:34,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:13:34,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:13:34,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:13:34,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:13:27" (1/3) ... [2020-09-24 16:13:34,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c7dbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:13:34, skipping insertion in model container [2020-09-24 16:13:34,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:29" (2/3) ... [2020-09-24 16:13:34,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c7dbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:13:34, skipping insertion in model container [2020-09-24 16:13:34,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:13:34" (3/3) ... [2020-09-24 16:13:34,996 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-09-24 16:13:35,005 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:13:35,018 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:13:35,041 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:13:35,087 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:13:35,087 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:13:35,087 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:13:35,087 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:13:35,087 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:13:35,087 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:13:35,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:13:35,088 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:13:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states. [2020-09-24 16:13:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1334 [2020-09-24 16:13:35,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:35,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:35,268 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1264968219, now seen corresponding path program 1 times [2020-09-24 16:13:35,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:35,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093675762] [2020-09-24 16:13:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:38,305 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:38,305 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:38,306 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:38,306 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:38,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1340 [2020-09-24 16:13:38,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:38,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 16:13:38,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 427 [2020-09-24 16:13:38,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 309 [2020-09-24 16:13:38,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:13:40,816 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 388 [2020-09-24 16:13:40,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:40,833 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:40,834 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:40,834 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:40,834 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:40,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 16:13:40,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:40,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:40,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:40,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:40,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:42,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093675762] [2020-09-24 16:13:42,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:42,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:42,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266800412] [2020-09-24 16:13:42,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:42,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:42,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:42,177 INFO L87 Difference]: Start difference. First operand 3166 states. Second operand 5 states. [2020-09-24 16:14:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:14:09,516 INFO L93 Difference]: Finished difference Result 8529 states and 11674 transitions. [2020-09-24 16:14:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:14:09,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1333 [2020-09-24 16:14:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:14:09,580 INFO L225 Difference]: With dead ends: 8529 [2020-09-24 16:14:09,580 INFO L226 Difference]: Without dead ends: 5406 [2020-09-24 16:14:09,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:14:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5406 states. [2020-09-24 16:14:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5406 to 5404. [2020-09-24 16:14:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5404 states. [2020-09-24 16:14:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 7075 transitions. [2020-09-24 16:14:09,874 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 7075 transitions. Word has length 1333 [2020-09-24 16:14:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:14:09,877 INFO L479 AbstractCegarLoop]: Abstraction has 5404 states and 7075 transitions. [2020-09-24 16:14:09,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:14:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 7075 transitions. [2020-09-24 16:14:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2020-09-24 16:14:09,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:14:09,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:14:09,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:14:09,951 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:14:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:14:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1324188248, now seen corresponding path program 1 times [2020-09-24 16:14:09,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:14:09,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658583478] [2020-09-24 16:14:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:14:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:14:10,466 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:14:10,466 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:14:10,467 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:14:10,467 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:14:10,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1342 [2020-09-24 16:14:10,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:14:10,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 16:14:10,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:14:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:14:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 449 [2020-09-24 16:14:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 304 [2020-09-24 16:14:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:14:12,895 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 388 [2020-09-24 16:14:12,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:14:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:14:12,911 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:14:12,912 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:14:12,912 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:14:12,912 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:14:12,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 16:14:12,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:14:12,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:14:12,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:14:12,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:14:12,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:14:12,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:14:12,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:14:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:14:14,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658583478] [2020-09-24 16:14:14,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:14:14,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:14:14,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249105069] [2020-09-24 16:14:14,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:14:14,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:14:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:14:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:14:14,212 INFO L87 Difference]: Start difference. First operand 5404 states and 7075 transitions. Second operand 4 states.