/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=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:41:54,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:41:54,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:41:54,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:41:54,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:41:54,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:41:54,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:41:54,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:41:54,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:41:54,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:41:54,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:41:54,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:41:54,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:41:54,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:41:54,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:41:54,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:41:54,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:41:54,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:41:54,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:41:54,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:41:54,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:41:54,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:41:54,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:41:54,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:41:54,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:41:54,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:41:54,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:41:54,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:41:54,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:41:54,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:41:54,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:41:54,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:41:54,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:41:54,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:41:54,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:41:54,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:41:54,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:41:54,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:41:54,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:41:54,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:41:54,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:41:54,605 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 13:41:54,665 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:41:54,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:41:54,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:41:54,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:41:54,667 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:41:54,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:41:54,668 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:41:54,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:41:54,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:41:54,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:41:54,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:41:54,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:41:54,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:41:54,670 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:41:54,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:41:54,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:41:54,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:41:54,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:41:54,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:41:54,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:41:54,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:41:54,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:41:54,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:41:54,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:41:54,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:41:54,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:41:54,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:41:54,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:41:54,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:41:54,674 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 13:41:55,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:41:55,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:41:55,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:41:55,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:41:55,180 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:41:55,181 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 13:41:55,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f715ba598/714f02474b7b49ef8ba8c182af73f6f7/FLAG2c7051124 [2020-09-25 13:41:55,892 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:41:55,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 13:41:55,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f715ba598/714f02474b7b49ef8ba8c182af73f6f7/FLAG2c7051124 [2020-09-25 13:41:56,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f715ba598/714f02474b7b49ef8ba8c182af73f6f7 [2020-09-25 13:41:56,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:41:56,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:41:56,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:41:56,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:41:56,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:41:56,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:41:56" (1/1) ... [2020-09-25 13:41:56,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17866592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:56, skipping insertion in model container [2020-09-25 13:41:56,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:41:56" (1/1) ... [2020-09-25 13:41:56,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:41:56,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:41:56,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:41:56,816 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:41:56,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:41:57,010 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:41:57,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57 WrapperNode [2020-09-25 13:41:57,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:41:57,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:41:57,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:41:57,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:41:57,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (1/1) ... [2020-09-25 13:41:57,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (1/1) ... [2020-09-25 13:41:57,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (1/1) ... [2020-09-25 13:41:57,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (1/1) ... [2020-09-25 13:41:57,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (1/1) ... [2020-09-25 13:41:57,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (1/1) ... [2020-09-25 13:41:57,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (1/1) ... [2020-09-25 13:41:57,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:41:57,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:41:57,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:41:57,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:41:57,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (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 13:41:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:41:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:41:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:41:57,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:41:57,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:41:57,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 13:41:57,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 13:41:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 13:41:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:41:57,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:41:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 13:41:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 13:41:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 13:41:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 13:41:57,226 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 13:41:57,227 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 13:41:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 13:41:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:41:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:41:57,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:41:58,787 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:41:58,787 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:41:58,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:41:58 BoogieIcfgContainer [2020-09-25 13:41:58,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:41:58,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:41:58,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:41:58,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:41:58,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:41:56" (1/3) ... [2020-09-25 13:41:58,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5857e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:41:58, skipping insertion in model container [2020-09-25 13:41:58,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:41:57" (2/3) ... [2020-09-25 13:41:58,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5857e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:41:58, skipping insertion in model container [2020-09-25 13:41:58,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:41:58" (3/3) ... [2020-09-25 13:41:58,810 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 13:41:58,821 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:41:58,833 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:41:58,854 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:41:58,888 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:41:58,889 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:41:58,889 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:41:58,889 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:41:58,889 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:41:58,889 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:41:58,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:41:58,889 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:41:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-25 13:41:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 13:41:58,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:41:58,966 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] [2020-09-25 13:41:58,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:41:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:41:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-25 13:41:58,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:41:58,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442521262] [2020-09-25 13:41:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:41:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:41:59,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:01,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:01,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:01,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:04,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:04,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 13:42:04,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:04,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-09-25 13:42:04,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:04,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:42:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-09-25 13:42:04,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 13:42:04,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:42:05,166 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 13:42:05,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:05,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:05,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:05,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 13:42:05,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:05,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-25 13:42:05,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:05,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:05,556 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 13:42:05,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442521262] [2020-09-25 13:42:05,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:05,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:42:05,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023193516] [2020-09-25 13:42:05,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:42:05,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:05,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:42:05,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:05,600 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 4 states. [2020-09-25 13:42:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:09,046 INFO L93 Difference]: Finished difference Result 1488 states and 1948 transitions. [2020-09-25 13:42:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:42:09,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 13:42:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:09,097 INFO L225 Difference]: With dead ends: 1488 [2020-09-25 13:42:09,097 INFO L226 Difference]: Without dead ends: 1109 [2020-09-25 13:42:09,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-09-25 13:42:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2020-09-25 13:42:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-09-25 13:42:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions. [2020-09-25 13:42:09,231 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418 [2020-09-25 13:42:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:09,233 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions. [2020-09-25 13:42:09,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:42:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions. [2020-09-25 13:42:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 13:42:09,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:09,260 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] [2020-09-25 13:42:09,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:42:09,260 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:09,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times [2020-09-25 13:42:09,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:09,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241655812] [2020-09-25 13:42:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:09,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:09,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:10,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:10,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:10,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:10,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:10,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:14,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:14,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 13:42:14,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:14,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 13:42:14,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:14,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:14,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:42:14,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-25 13:42:14,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-25 13:42:14,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:14,868 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 13:42:14,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:14,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:14,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:14,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 13:42:14,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:14,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-25 13:42:14,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:14,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:14,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:42:15,370 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 13:42:15,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241655812] [2020-09-25 13:42:15,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:15,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:42:15,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063784904] [2020-09-25 13:42:15,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:42:15,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:15,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:42:15,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:15,380 INFO L87 Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states. [2020-09-25 13:42:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:18,413 INFO L93 Difference]: Finished difference Result 2222 states and 2792 transitions. [2020-09-25 13:42:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:42:18,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 13:42:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:18,434 INFO L225 Difference]: With dead ends: 2222 [2020-09-25 13:42:18,435 INFO L226 Difference]: Without dead ends: 1828 [2020-09-25 13:42:18,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-09-25 13:42:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816. [2020-09-25 13:42:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2020-09-25 13:42:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions. [2020-09-25 13:42:18,543 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418 [2020-09-25 13:42:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:18,545 INFO L479 AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions. [2020-09-25 13:42:18,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:42:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions. [2020-09-25 13:42:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 13:42:18,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:18,557 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] [2020-09-25 13:42:18,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:42:18,557 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times [2020-09-25 13:42:18,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:18,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312733721] [2020-09-25 13:42:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:18,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:19,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:19,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:19,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:19,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:19,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:23,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:23,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 13:42:23,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:42:23,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 13:42:23,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:23,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:42:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-09-25 13:42:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-25 13:42:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:24,109 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 13:42:24,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:24,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:24,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 13:42:24,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:24,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 13:42:24,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:24,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:24,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:24,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:24,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:24,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:24,396 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 13:42:24,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312733721] [2020-09-25 13:42:24,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:24,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:42:24,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724336398] [2020-09-25 13:42:24,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:42:24,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:24,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:42:24,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:24,399 INFO L87 Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states. [2020-09-25 13:42:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:26,722 INFO L93 Difference]: Finished difference Result 3904 states and 4955 transitions. [2020-09-25 13:42:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:42:26,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 13:42:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:26,739 INFO L225 Difference]: With dead ends: 3904 [2020-09-25 13:42:26,739 INFO L226 Difference]: Without dead ends: 3194 [2020-09-25 13:42:26,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:42:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-25 13:42:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172. [2020-09-25 13:42:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2020-09-25 13:42:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions. [2020-09-25 13:42:26,864 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418 [2020-09-25 13:42:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:26,866 INFO L479 AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions. [2020-09-25 13:42:26,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:42:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions. [2020-09-25 13:42:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 13:42:26,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:26,885 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] [2020-09-25 13:42:26,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:42:26,885 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times [2020-09-25 13:42:26,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:26,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144124927] [2020-09-25 13:42:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:27,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:27,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:27,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:27,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:28,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:31,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:31,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:32,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:32,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 13:42:32,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:42:32,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 13:42:32,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:32,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:32,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:42:32,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-25 13:42:32,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-25 13:42:32,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:42:32,609 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 13:42:32,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:42:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:32,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:32,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:42:32,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 13:42:32,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:42:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 13:42:32,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:42:32,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:42:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:42:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:42:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:42:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:42:33,159 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 13:42:33,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144124927] [2020-09-25 13:42:33,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:42:33,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 13:42:33,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179926551] [2020-09-25 13:42:33,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:42:33,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:42:33,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:42:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:42:33,164 INFO L87 Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states. [2020-09-25 13:42:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:42:38,424 INFO L93 Difference]: Finished difference Result 8870 states and 11190 transitions. [2020-09-25 13:42:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:42:38,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-25 13:42:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:42:38,460 INFO L225 Difference]: With dead ends: 8870 [2020-09-25 13:42:38,460 INFO L226 Difference]: Without dead ends: 5990 [2020-09-25 13:42:38,468 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 13:42:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2020-09-25 13:42:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5988. [2020-09-25 13:42:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5988 states. [2020-09-25 13:42:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 7502 transitions. [2020-09-25 13:42:38,710 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 7502 transitions. Word has length 418 [2020-09-25 13:42:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:42:38,711 INFO L479 AbstractCegarLoop]: Abstraction has 5988 states and 7502 transitions. [2020-09-25 13:42:38,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:42:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 7502 transitions. [2020-09-25 13:42:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 13:42:38,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:42:38,725 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] [2020-09-25 13:42:38,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:42:38,726 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:42:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:42:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2125544469, now seen corresponding path program 1 times [2020-09-25 13:42:38,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:42:38,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204260403] [2020-09-25 13:42:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:42:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:42:38,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:42:39,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking...