/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=DEEPEST --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 01:12:25,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:12:25,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:12:25,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:12:25,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:12:25,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:12:25,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:12:25,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:12:25,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:12:25,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:12:25,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:12:25,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:12:25,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:12:25,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:12:25,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:12:25,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:12:25,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:12:25,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:12:25,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:12:25,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:12:25,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:12:25,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:12:25,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:12:25,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:12:25,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:12:25,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:12:25,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:12:25,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:12:25,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:12:25,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:12:25,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:12:25,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:12:25,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:12:25,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:12:25,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:12:25,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:12:25,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:12:25,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:12:25,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:12:25,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:12:25,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:12:25,585 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 01:12:25,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:12:25,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:12:25,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:12:25,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:12:25,629 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:12:25,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:12:25,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:12:25,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:12:25,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:12:25,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:12:25,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:12:25,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:12:25,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:12:25,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:12:25,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:12:25,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:12:25,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:12:25,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:12:25,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:12:25,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:12:25,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:12:25,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:12:25,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:12:25,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:12:25,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:12:25,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:12:25,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:12:25,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:12:25,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:12:25,636 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:12:26,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:12:26,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:12:26,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:12:26,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:12:26,108 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:12:26,110 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 01:12:26,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd7e34475/c2f167ae4ea44fd9976c35eb4afd7d2a/FLAG2eddc64f4 [2020-09-25 01:12:26,768 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:12:26,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 01:12:26,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd7e34475/c2f167ae4ea44fd9976c35eb4afd7d2a/FLAG2eddc64f4 [2020-09-25 01:12:27,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd7e34475/c2f167ae4ea44fd9976c35eb4afd7d2a [2020-09-25 01:12:27,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:12:27,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:12:27,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:12:27,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:12:27,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:12:27,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:12:27" (1/1) ... [2020-09-25 01:12:27,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658c4011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:27, skipping insertion in model container [2020-09-25 01:12:27,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:12:27" (1/1) ... [2020-09-25 01:12:27,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:12:27,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:12:27,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:12:27,820 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:12:27,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:12:28,012 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:12:28,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28 WrapperNode [2020-09-25 01:12:28,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:12:28,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:12:28,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:12:28,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:12:28,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (1/1) ... [2020-09-25 01:12:28,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (1/1) ... [2020-09-25 01:12:28,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (1/1) ... [2020-09-25 01:12:28,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (1/1) ... [2020-09-25 01:12:28,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (1/1) ... [2020-09-25 01:12:28,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (1/1) ... [2020-09-25 01:12:28,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (1/1) ... [2020-09-25 01:12:28,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:12:28,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:12:28,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:12:28,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:12:28,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (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 01:12:28,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:12:28,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:12:28,243 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:12:28,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:12:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:12:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 01:12:28,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 01:12:28,244 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 01:12:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:12:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:12:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 01:12:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 01:12:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 01:12:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 01:12:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 01:12:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 01:12:28,247 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 01:12:28,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:12:28,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:12:28,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:12:29,903 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:12:29,904 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 01:12:29,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:12:29 BoogieIcfgContainer [2020-09-25 01:12:29,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:12:29,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:12:29,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:12:29,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:12:29,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:12:27" (1/3) ... [2020-09-25 01:12:29,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11758051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:12:29, skipping insertion in model container [2020-09-25 01:12:29,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:12:28" (2/3) ... [2020-09-25 01:12:29,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11758051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:12:29, skipping insertion in model container [2020-09-25 01:12:29,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:12:29" (3/3) ... [2020-09-25 01:12:29,946 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 01:12:29,962 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:12:29,974 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:12:29,996 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:12:30,033 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:12:30,033 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:12:30,034 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:12:30,034 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:12:30,034 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:12:30,034 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:12:30,034 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:12:30,034 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:12:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-25 01:12:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 01:12:30,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:12:30,111 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 01:12:30,112 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:12:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:12:30,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-25 01:12:30,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:12:30,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969496019] [2020-09-25 01:12:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:12:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:12:30,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:31,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:31,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:32,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:32,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:35,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:12:35,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 01:12:35,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 01:12:35,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-09-25 01:12:35,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:12:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:12:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-09-25 01:12:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-09-25 01:12:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:12:36,287 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 01:12:36,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:12:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:12:36,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:36,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:12:36,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 01:12:36,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:12:36,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 01:12:36,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:12:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:12:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:12:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:12:36,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:12:36,652 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 01:12:36,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969496019] [2020-09-25 01:12:36,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:12:36,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:12:36,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899821631] [2020-09-25 01:12:36,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:12:36,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:12:36,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:12:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:12:36,696 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 4 states. [2020-09-25 01:12:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:12:39,904 INFO L93 Difference]: Finished difference Result 1488 states and 1948 transitions. [2020-09-25 01:12:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:12:39,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 01:12:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:12:39,952 INFO L225 Difference]: With dead ends: 1488 [2020-09-25 01:12:39,952 INFO L226 Difference]: Without dead ends: 1109 [2020-09-25 01:12:39,959 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 01:12:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-09-25 01:12:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2020-09-25 01:12:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-09-25 01:12:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions. [2020-09-25 01:12:40,105 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418 [2020-09-25 01:12:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:12:40,110 INFO L479 AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions. [2020-09-25 01:12:40,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:12:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions. [2020-09-25 01:12:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 01:12:40,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:12:40,130 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 01:12:40,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:12:40,131 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:12:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:12:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times [2020-09-25 01:12:40,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:12:40,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870003537] [2020-09-25 01:12:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:12:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:12:40,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:40,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:40,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:40,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:41,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:41,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:41,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:45,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:12:45,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 01:12:45,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 01:12:45,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-09-25 01:12:45,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:12:45,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:12:45,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 197 [2020-09-25 01:12:45,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-25 01:12:45,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:12:45,693 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 01:12:45,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:12:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:12:45,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:45,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:12:45,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 01:12:45,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:12:45,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 01:12:45,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:12:45,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:12:45,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:12:45,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:12:45,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:12:46,045 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 01:12:46,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870003537] [2020-09-25 01:12:46,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:12:46,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:12:46,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481636922] [2020-09-25 01:12:46,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:12:46,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:12:46,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:12:46,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:12:46,055 INFO L87 Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states. [2020-09-25 01:12:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:12:48,691 INFO L93 Difference]: Finished difference Result 2222 states and 2792 transitions. [2020-09-25 01:12:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:12:48,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 01:12:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:12:48,704 INFO L225 Difference]: With dead ends: 2222 [2020-09-25 01:12:48,704 INFO L226 Difference]: Without dead ends: 1828 [2020-09-25 01:12:48,708 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 01:12:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-09-25 01:12:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816. [2020-09-25 01:12:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2020-09-25 01:12:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions. [2020-09-25 01:12:48,765 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418 [2020-09-25 01:12:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:12:48,766 INFO L479 AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions. [2020-09-25 01:12:48,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:12:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions. [2020-09-25 01:12:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 01:12:48,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:12:48,772 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 01:12:48,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:12:48,773 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:12:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:12:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times [2020-09-25 01:12:48,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:12:48,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698255694] [2020-09-25 01:12:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:12:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:12:48,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:49,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:49,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:53,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:12:53,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 01:12:53,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 01:12:53,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 01:12:53,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:12:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:12:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-09-25 01:12:53,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-09-25 01:12:53,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:12:54,241 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 01:12:54,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:12:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:12:54,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:54,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:12:54,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 01:12:54,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:12:54,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 01:12:54,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:12:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:12:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:12:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:12:54,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:12:54,577 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 01:12:54,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698255694] [2020-09-25 01:12:54,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:12:54,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:12:54,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959560388] [2020-09-25 01:12:54,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:12:54,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:12:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:12:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:12:54,581 INFO L87 Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states. [2020-09-25 01:12:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:12:56,997 INFO L93 Difference]: Finished difference Result 3904 states and 4955 transitions. [2020-09-25 01:12:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 01:12:56,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-09-25 01:12:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:12:57,015 INFO L225 Difference]: With dead ends: 3904 [2020-09-25 01:12:57,016 INFO L226 Difference]: Without dead ends: 3194 [2020-09-25 01:12:57,019 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 01:12:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-25 01:12:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172. [2020-09-25 01:12:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3172 states. [2020-09-25 01:12:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions. [2020-09-25 01:12:57,111 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418 [2020-09-25 01:12:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:12:57,113 INFO L479 AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions. [2020-09-25 01:12:57,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:12:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions. [2020-09-25 01:12:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-25 01:12:57,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:12:57,119 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 01:12:57,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:12:57,120 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:12:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:12:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times [2020-09-25 01:12:57,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:12:57,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934008406] [2020-09-25 01:12:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:12:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:12:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:57,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:57,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:12:58,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:00,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:01,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:02,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:02,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-25 01:13:02,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 01:13:02,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 01:13:02,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 01:13:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-25 01:13:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 01:13:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:02,626 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 01:13:02,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:02,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:02,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 01:13:02,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:02,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 01:13:02,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:02,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:02,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:13:02,965 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 01:13:02,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934008406] [2020-09-25 01:13:02,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:02,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:13:02,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927843714] [2020-09-25 01:13:02,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:13:02,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:02,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:13:02,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:13:02,968 INFO L87 Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states. [2020-09-25 01:13:07,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:13:07,063 INFO L93 Difference]: Finished difference Result 8965 states and 11305 transitions. [2020-09-25 01:13:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:13:07,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-25 01:13:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:13:07,090 INFO L225 Difference]: With dead ends: 8965 [2020-09-25 01:13:07,090 INFO L226 Difference]: Without dead ends: 5993 [2020-09-25 01:13:07,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:13:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2020-09-25 01:13:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 5991. [2020-09-25 01:13:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5991 states. [2020-09-25 01:13:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5991 states to 5991 states and 7503 transitions. [2020-09-25 01:13:07,280 INFO L78 Accepts]: Start accepts. Automaton has 5991 states and 7503 transitions. Word has length 418 [2020-09-25 01:13:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:13:07,281 INFO L479 AbstractCegarLoop]: Abstraction has 5991 states and 7503 transitions. [2020-09-25 01:13:07,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:13:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5991 states and 7503 transitions. [2020-09-25 01:13:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-25 01:13:07,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:13:07,296 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 01:13:07,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:13:07,296 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:13:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:13:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash -676326801, now seen corresponding path program 1 times [2020-09-25 01:13:07,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:13:07,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348885670] [2020-09-25 01:13:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:13:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:07,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:07,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:07,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:07,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:08,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:09,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:12,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:12,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-25 01:13:12,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:13:12,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 01:13:12,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:13:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-25 01:13:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 01:13:12,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:12,676 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-25 01:13:12,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:13:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:13:12,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:13:12,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:13:12,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 01:13:12,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:13:12,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-25 01:13:12,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:13:12,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:13:12,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:13:12,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:13:12,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:13:12,887 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 01:13:12,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348885670] [2020-09-25 01:13:12,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:13:12,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:13:12,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081401877] [2020-09-25 01:13:12,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:13:12,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:13:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:13:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:13:12,896 INFO L87 Difference]: Start difference. First operand 5991 states and 7503 transitions. Second operand 4 states.