/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:50:15,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:50:15,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:50:16,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:50:16,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:50:16,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:50:16,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:50:16,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:50:16,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:50:16,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:50:16,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:50:16,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:50:16,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:50:16,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:50:16,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:50:16,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:50:16,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:50:16,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:50:16,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:50:16,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:50:16,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:50:16,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:50:16,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:50:16,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:50:16,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:50:16,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:50:16,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:50:16,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:50:16,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:50:16,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:50:16,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:50:16,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:50:16,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:50:16,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:50:16,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:50:16,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:50:16,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:50:16,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:50:16,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:50:16,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:50:16,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:50:16,117 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 14:50:16,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:50:16,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:50:16,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:50:16,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:50:16,170 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:50:16,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:50:16,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:50:16,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:50:16,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:50:16,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:50:16,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:50:16,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:50:16,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:50:16,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:50:16,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:50:16,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:50:16,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:50:16,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:50:16,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:50:16,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:50:16,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:50:16,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:50:16,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:50:16,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:50:16,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:50:16,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:50:16,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:50:16,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:50:16,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:50:16,177 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:50:16,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:50:16,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:50:16,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:50:16,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:50:16,655 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:50:16,656 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 14:50:16,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9122943c6/10066e843563428b83cf16080dd4df0f/FLAG07e59ea79 [2020-09-25 14:50:17,478 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:50:17,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 14:50:17,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9122943c6/10066e843563428b83cf16080dd4df0f/FLAG07e59ea79 [2020-09-25 14:50:17,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9122943c6/10066e843563428b83cf16080dd4df0f [2020-09-25 14:50:17,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:50:17,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:50:17,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:50:17,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:50:17,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:50:17,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:50:17" (1/1) ... [2020-09-25 14:50:17,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172792f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:17, skipping insertion in model container [2020-09-25 14:50:17,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:50:17" (1/1) ... [2020-09-25 14:50:17,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:50:17,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:50:18,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:50:18,404 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:50:19,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:50:19,071 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:50:19,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19 WrapperNode [2020-09-25 14:50:19,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:50:19,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:50:19,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:50:19,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:50:19,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (1/1) ... [2020-09-25 14:50:19,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (1/1) ... [2020-09-25 14:50:19,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (1/1) ... [2020-09-25 14:50:19,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (1/1) ... [2020-09-25 14:50:19,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (1/1) ... [2020-09-25 14:50:19,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (1/1) ... [2020-09-25 14:50:19,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (1/1) ... [2020-09-25 14:50:19,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:50:19,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:50:19,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:50:19,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:50:19,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (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 14:50:19,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:50:19,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:50:19,330 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 14:50:19,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:50:19,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:50:19,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 14:50:19,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 14:50:19,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 14:50:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 14:50:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:50:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 14:50:19,333 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 14:50:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 14:50:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 14:50:19,334 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 14:50:19,335 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 14:50:19,336 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 14:50:19,336 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 14:50:19,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:50:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:50:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:50:21,527 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:50:21,528 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:50:21,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:50:21 BoogieIcfgContainer [2020-09-25 14:50:21,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:50:21,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:50:21,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:50:21,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:50:21,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:50:17" (1/3) ... [2020-09-25 14:50:21,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2292477e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:50:21, skipping insertion in model container [2020-09-25 14:50:21,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:50:19" (2/3) ... [2020-09-25 14:50:21,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2292477e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:50:21, skipping insertion in model container [2020-09-25 14:50:21,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:50:21" (3/3) ... [2020-09-25 14:50:21,556 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-25 14:50:21,568 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:50:21,579 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 14:50:21,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 14:50:21,637 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:50:21,637 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:50:21,637 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:50:21,637 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:50:21,637 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:50:21,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:50:21,638 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:50:21,638 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:50:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-25 14:50:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 14:50:21,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:21,735 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] [2020-09-25 14:50:21,735 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-25 14:50:21,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:21,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639227019] [2020-09-25 14:50:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:22,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:23,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:23,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:23,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:24,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:26,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:27,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:27,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 14:50:27,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:50:27,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-09-25 14:50:27,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:27,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:50:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 14:50:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-25 14:50:27,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:50:28,228 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 14:50:28,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:28,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:28,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 14:50:28,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:28,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-25 14:50:28,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:28,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:28,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:28,902 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 14:50:28,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639227019] [2020-09-25 14:50:28,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:28,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:50:28,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795032399] [2020-09-25 14:50:28,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:50:28,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:28,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:50:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:28,940 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 4 states. [2020-09-25 14:50:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:33,984 INFO L93 Difference]: Finished difference Result 2019 states and 2601 transitions. [2020-09-25 14:50:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:50:33,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 14:50:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:34,022 INFO L225 Difference]: With dead ends: 2019 [2020-09-25 14:50:34,022 INFO L226 Difference]: Without dead ends: 1445 [2020-09-25 14:50:34,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-09-25 14:50:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438. [2020-09-25 14:50:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2020-09-25 14:50:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions. [2020-09-25 14:50:34,173 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456 [2020-09-25 14:50:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:34,175 INFO L479 AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions. [2020-09-25 14:50:34,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:50:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions. [2020-09-25 14:50:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 14:50:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:34,188 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] [2020-09-25 14:50:34,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:50:34,189 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times [2020-09-25 14:50:34,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:34,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589457201] [2020-09-25 14:50:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:34,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:34,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:34,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:35,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:38,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:39,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:39,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:39,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 14:50:39,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:50:39,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 14:50:39,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:39,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:39,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:50:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-09-25 14:50:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-25 14:50:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 14:50:39,887 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 14:50:39,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:39,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:39,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:39,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 14:50:39,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:39,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 14:50:39,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:39,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:39,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:39,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:39,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:40,413 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 14:50:40,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589457201] [2020-09-25 14:50:40,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:40,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:50:40,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524599971] [2020-09-25 14:50:40,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:50:40,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:50:40,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:40,422 INFO L87 Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states. [2020-09-25 14:50:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:44,535 INFO L93 Difference]: Finished difference Result 2635 states and 3268 transitions. [2020-09-25 14:50:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:50:44,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-25 14:50:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:44,548 INFO L225 Difference]: With dead ends: 2635 [2020-09-25 14:50:44,548 INFO L226 Difference]: Without dead ends: 2144 [2020-09-25 14:50:44,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:50:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-09-25 14:50:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132. [2020-09-25 14:50:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2020-09-25 14:50:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions. [2020-09-25 14:50:44,624 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456 [2020-09-25 14:50:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:44,626 INFO L479 AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions. [2020-09-25 14:50:44,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:50:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions. [2020-09-25 14:50:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-25 14:50:44,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:44,633 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] [2020-09-25 14:50:44,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:50:44,633 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:44,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:44,634 INFO L82 PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times [2020-09-25 14:50:44,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:44,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566348477] [2020-09-25 14:50:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:45,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:46,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:48,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:49,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:49,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-25 14:50:49,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:50:49,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 14:50:49,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:49,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:49,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:50:49,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-09-25 14:50:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-25 14:50:49,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:50,338 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-25 14:50:50,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:50:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:50,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:50,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:50:50,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 14:50:50,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:50:50,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 14:50:50,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:50:50,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:50:50,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:50:50,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:50:50,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:50:50,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:50:50,739 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 14:50:50,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566348477] [2020-09-25 14:50:50,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:50:50,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:50:50,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207579978] [2020-09-25 14:50:50,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:50:50,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:50:50,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:50:50,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:50:50,745 INFO L87 Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states. [2020-09-25 14:50:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:50:58,071 INFO L93 Difference]: Finished difference Result 5777 states and 7153 transitions. [2020-09-25 14:50:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:50:58,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-25 14:50:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:50:58,090 INFO L225 Difference]: With dead ends: 5777 [2020-09-25 14:50:58,091 INFO L226 Difference]: Without dead ends: 3969 [2020-09-25 14:50:58,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:50:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2020-09-25 14:50:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3838. [2020-09-25 14:50:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3838 states. [2020-09-25 14:50:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 4748 transitions. [2020-09-25 14:50:58,231 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 4748 transitions. Word has length 456 [2020-09-25 14:50:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:50:58,232 INFO L479 AbstractCegarLoop]: Abstraction has 3838 states and 4748 transitions. [2020-09-25 14:50:58,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:50:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 4748 transitions. [2020-09-25 14:50:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-25 14:50:58,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:50:58,241 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] [2020-09-25 14:50:58,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:50:58,241 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:50:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:50:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1246597683, now seen corresponding path program 1 times [2020-09-25 14:50:58,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:50:58,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110300279] [2020-09-25 14:50:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:50:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:50:58,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:58,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:58,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:58,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:59,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:50:59,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:01,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:51:03,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:51:03,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-25 14:51:03,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:51:03,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-25 14:51:03,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:51:03,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:51:03,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:51:03,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-25 14:51:03,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-09-25 14:51:03,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1