/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:02:31,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:02:31,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:02:31,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:02:31,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:02:31,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:02:31,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:02:31,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:02:31,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:02:31,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:02:31,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:02:31,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:02:31,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:02:31,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:02:31,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:02:31,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:02:31,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:02:31,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:02:31,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:02:31,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:02:31,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:02:31,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:02:31,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:02:31,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:02:31,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:02:31,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:02:31,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:02:31,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:02:31,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:02:31,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:02:31,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:02:31,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:02:31,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:02:31,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:02:31,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:02:31,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:02:31,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:02:31,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:02:31,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:02:31,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:02:31,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:02:31,628 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 [2020-10-26 21:02:31,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:02:31,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:02:31,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:02:31,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:02:31,658 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:02:31,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:02:31,659 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:02:31,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:02:31,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:02:31,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:02:31,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:02:31,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:02:31,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:02:31,660 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:02:31,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:02:31,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:02:31,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:02:31,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:02:31,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:02:31,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:02:31,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:02:31,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:02:31,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:02:31,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:02:31,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:02:31,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:02:31,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:02:31,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:02:31,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:02:31,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:02:32,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:02:32,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:02:32,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:02:32,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:02:32,122 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:02:32,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label32.c [2020-10-26 21:02:32,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ed97a35/97911d1a23814a9b9470de001eb06524/FLAG5e9fd79dc [2020-10-26 21:02:33,198 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:02:33,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label32.c [2020-10-26 21:02:33,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ed97a35/97911d1a23814a9b9470de001eb06524/FLAG5e9fd79dc [2020-10-26 21:02:33,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ed97a35/97911d1a23814a9b9470de001eb06524 [2020-10-26 21:02:33,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:02:33,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:02:33,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:02:33,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:02:33,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:02:33,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:02:33" (1/1) ... [2020-10-26 21:02:33,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47293faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:33, skipping insertion in model container [2020-10-26 21:02:33,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:02:33" (1/1) ... [2020-10-26 21:02:33,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:02:33,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:02:35,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:02:35,296 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:02:36,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:02:36,133 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:02:36,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36 WrapperNode [2020-10-26 21:02:36,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:02:36,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:02:36,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:02:36,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:02:36,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (1/1) ... [2020-10-26 21:02:36,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (1/1) ... [2020-10-26 21:02:36,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (1/1) ... [2020-10-26 21:02:36,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (1/1) ... [2020-10-26 21:02:36,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (1/1) ... [2020-10-26 21:02:36,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (1/1) ... [2020-10-26 21:02:36,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (1/1) ... [2020-10-26 21:02:36,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:02:36,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:02:36,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:02:36,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:02:36,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (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 [2020-10-26 21:02:36,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:02:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:02:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:02:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:02:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:02:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:02:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:02:36,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:02:36,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:02:36,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:02:36,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:02:36,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:02:36,500 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:02:36,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:02:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:02:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:02:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:02:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:02:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:02:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:02:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:02:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:02:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:02:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:02:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:02:41,867 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:02:41,868 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:02:41,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:02:41 BoogieIcfgContainer [2020-10-26 21:02:41,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:02:41,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:02:41,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:02:41,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:02:41,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:02:33" (1/3) ... [2020-10-26 21:02:41,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae22ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:02:41, skipping insertion in model container [2020-10-26 21:02:41,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:02:36" (2/3) ... [2020-10-26 21:02:41,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae22ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:02:41, skipping insertion in model container [2020-10-26 21:02:41,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:02:41" (3/3) ... [2020-10-26 21:02:41,885 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label32.c [2020-10-26 21:02:41,897 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:02:41,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:02:41,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:02:41,967 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:02:41,967 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:02:41,967 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:02:41,967 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:02:41,967 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:02:41,968 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:02:41,968 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:02:41,968 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:02:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-26 21:02:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-10-26 21:02:42,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:02:42,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:02:42,083 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:02:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:02:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash -765730800, now seen corresponding path program 1 times [2020-10-26 21:02:42,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:02:42,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776163910] [2020-10-26 21:02:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:02:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:43,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:47,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:47,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 801 [2020-10-26 21:02:47,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:02:47,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 21:02:47,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:02:47,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:02:47,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-26 21:02:47,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:02:50,198 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-26 21:02:50,464 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-26 21:02:50,849 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-26 21:02:51,218 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 46 [2020-10-26 21:02:51,483 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2020-10-26 21:02:51,622 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-26 21:02:52,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:02:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:52,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:52,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:52,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:02:52,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:02:52,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:02:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:02:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:02:57,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776163910] [2020-10-26 21:02:57,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:02:57,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:02:57,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756664724] [2020-10-26 21:02:57,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:02:57,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:02:57,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:02:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:02:57,365 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 18 states. [2020-10-26 21:02:57,647 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-26 21:02:57,872 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-26 21:02:58,127 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-26 21:02:58,409 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-26 21:02:59,110 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 129 [2020-10-26 21:02:59,683 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 128 [2020-10-26 21:03:02,808 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2020-10-26 21:03:03,350 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2020-10-26 21:03:05,984 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-26 21:03:06,383 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-26 21:03:07,975 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-26 21:03:12,409 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 21:03:12,602 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 21:03:18,475 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 21:03:18,666 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 21:03:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:03:21,965 INFO L93 Difference]: Finished difference Result 2553 states and 4911 transitions. [2020-10-26 21:03:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:03:21,969 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 785 [2020-10-26 21:03:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:03:22,010 INFO L225 Difference]: With dead ends: 2553 [2020-10-26 21:03:22,011 INFO L226 Difference]: Without dead ends: 1581 [2020-10-26 21:03:22,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:03:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-26 21:03:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2020-10-26 21:03:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-26 21:03:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2340 transitions. [2020-10-26 21:03:22,200 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2340 transitions. Word has length 785 [2020-10-26 21:03:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:03:22,202 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2340 transitions. [2020-10-26 21:03:22,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:03:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2340 transitions. [2020-10-26 21:03:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2020-10-26 21:03:22,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:03:22,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:03:22,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:03:22,236 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:03:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:03:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1683794815, now seen corresponding path program 1 times [2020-10-26 21:03:22,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:03:22,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138859243] [2020-10-26 21:03:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:03:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:23,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:26,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:27,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:27,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 822 [2020-10-26 21:03:27,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:03:27,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-26 21:03:27,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 21:03:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:03:27,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 813 [2020-10-26 21:03:27,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 33 [2020-10-26 21:03:28,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:03:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:28,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:28,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:03:28,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 21:03:28,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:03:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:03:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:03:28,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:28,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:03:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:28,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:28,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:28,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:28,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:03:28,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:03:28,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 21:03:28,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:28,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:03:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:03:29,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138859243] [2020-10-26 21:03:29,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:03:29,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 21:03:29,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358215114] [2020-10-26 21:03:29,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 21:03:29,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:03:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 21:03:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:03:29,203 INFO L87 Difference]: Start difference. First operand 1581 states and 2340 transitions. Second operand 6 states. [2020-10-26 21:03:29,335 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:03:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:03:40,068 INFO L93 Difference]: Finished difference Result 3300 states and 5590 transitions. [2020-10-26 21:03:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 21:03:40,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 804 [2020-10-26 21:03:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:03:40,087 INFO L225 Difference]: With dead ends: 3300 [2020-10-26 21:03:40,088 INFO L226 Difference]: Without dead ends: 2452 [2020-10-26 21:03:40,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:03:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2020-10-26 21:03:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2428. [2020-10-26 21:03:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2428 states. [2020-10-26 21:03:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3782 transitions. [2020-10-26 21:03:40,181 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3782 transitions. Word has length 804 [2020-10-26 21:03:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:03:40,183 INFO L481 AbstractCegarLoop]: Abstraction has 2428 states and 3782 transitions. [2020-10-26 21:03:40,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 21:03:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3782 transitions. [2020-10-26 21:03:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2020-10-26 21:03:40,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:03:40,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:03:40,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:03:40,219 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:03:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:03:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash 705155293, now seen corresponding path program 1 times [2020-10-26 21:03:40,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:03:40,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943684050] [2020-10-26 21:03:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:03:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:40,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:40,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:43,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 832 [2020-10-26 21:03:45,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 21:03:45,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5177 [2020-10-26 21:03:45,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:03:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:03:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 21:03:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:03:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:03:45,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:45,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 21:03:45,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:03:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:03:45,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:03:45,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:03:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:03:45,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:03:45,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 21:03:45,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:03:45,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:03:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:03:45,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:45,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:03:45,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:45,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:03:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:03:46,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943684050] [2020-10-26 21:03:46,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:03:46,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:03:46,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871098656] [2020-10-26 21:03:46,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:03:46,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:03:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:03:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:03:46,428 INFO L87 Difference]: Start difference. First operand 2428 states and 3782 transitions. Second operand 8 states. [2020-10-26 21:03:53,384 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-26 21:03:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:03:59,142 INFO L93 Difference]: Finished difference Result 5114 states and 8461 transitions. [2020-10-26 21:03:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 21:03:59,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 812 [2020-10-26 21:03:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:03:59,163 INFO L225 Difference]: With dead ends: 5114 [2020-10-26 21:03:59,163 INFO L226 Difference]: Without dead ends: 3419 [2020-10-26 21:03:59,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 21:03:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2020-10-26 21:03:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 3304. [2020-10-26 21:03:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3304 states. [2020-10-26 21:03:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3304 states to 3304 states and 4881 transitions. [2020-10-26 21:03:59,311 INFO L78 Accepts]: Start accepts. Automaton has 3304 states and 4881 transitions. Word has length 812 [2020-10-26 21:03:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:03:59,312 INFO L481 AbstractCegarLoop]: Abstraction has 3304 states and 4881 transitions. [2020-10-26 21:03:59,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:03:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3304 states and 4881 transitions. [2020-10-26 21:03:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2020-10-26 21:03:59,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:03:59,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:03:59,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:03:59,341 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:03:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:03:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash -948482623, now seen corresponding path program 1 times [2020-10-26 21:03:59,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:03:59,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586979164] [2020-10-26 21:03:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:03:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:59,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:59,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:02,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:04,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:04,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 834 [2020-10-26 21:04:04,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:04:04,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 21:04:04,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:04,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:04:04,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:04:04,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 21:04:04,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:04,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:04:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:04,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:04,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:04,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:04:04,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:04,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 21:04:04,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:04:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:04:04,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:04,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:04:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:04,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:04,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:04,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:04,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:04:04,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:04:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 21:04:04,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:04:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:04,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:04:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:04,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:04,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:04,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 21:04:04,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:04,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 21:04:04,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:04,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:04,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 21:04:04,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:04:05,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586979164] [2020-10-26 21:04:05,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:04:05,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:04:05,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605219343] [2020-10-26 21:04:05,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:04:05,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:04:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:04:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:04:05,301 INFO L87 Difference]: Start difference. First operand 3304 states and 4881 transitions. Second operand 8 states. [2020-10-26 21:04:05,437 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:04:07,925 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:04:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:04:19,136 INFO L93 Difference]: Finished difference Result 8640 states and 13616 transitions. [2020-10-26 21:04:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:04:19,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 814 [2020-10-26 21:04:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:04:19,169 INFO L225 Difference]: With dead ends: 8640 [2020-10-26 21:04:19,169 INFO L226 Difference]: Without dead ends: 6069 [2020-10-26 21:04:19,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-26 21:04:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2020-10-26 21:04:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 5985. [2020-10-26 21:04:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5985 states. [2020-10-26 21:04:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5985 states to 5985 states and 8335 transitions. [2020-10-26 21:04:19,343 INFO L78 Accepts]: Start accepts. Automaton has 5985 states and 8335 transitions. Word has length 814 [2020-10-26 21:04:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:04:19,344 INFO L481 AbstractCegarLoop]: Abstraction has 5985 states and 8335 transitions. [2020-10-26 21:04:19,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:04:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 5985 states and 8335 transitions. [2020-10-26 21:04:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2020-10-26 21:04:19,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:04:19,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:04:19,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:04:19,368 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:04:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:04:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1074430293, now seen corresponding path program 1 times [2020-10-26 21:04:19,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:04:19,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684057668] [2020-10-26 21:04:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:04:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:19,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:19,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:21,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 846 [2020-10-26 21:04:24,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 21:04:24,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 21:04:24,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:04:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:04:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 21:04:24,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:24,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:04:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:24,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:04:24,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:24,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 21:04:24,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:04:24,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:04:24,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:04:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:24,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 21:04:24,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:04:24,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 21:04:24,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:24,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 21:04:24,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:24,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 21:04:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 21:04:24,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:24,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:04:24,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:24,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:24,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 21:04:24,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:04:25,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684057668] [2020-10-26 21:04:25,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:04:25,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:04:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878243286] [2020-10-26 21:04:25,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:04:25,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:04:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:04:25,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:04:25,199 INFO L87 Difference]: Start difference. First operand 5985 states and 8335 transitions. Second operand 8 states. [2020-10-26 21:04:25,329 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:04:34,434 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:04:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:04:40,031 INFO L93 Difference]: Finished difference Result 16889 states and 25590 transitions. [2020-10-26 21:04:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:04:40,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 826 [2020-10-26 21:04:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:04:40,105 INFO L225 Difference]: With dead ends: 16889 [2020-10-26 21:04:40,105 INFO L226 Difference]: Without dead ends: 11637 [2020-10-26 21:04:40,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-26 21:04:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11637 states. [2020-10-26 21:04:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11637 to 11395. [2020-10-26 21:04:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11395 states. [2020-10-26 21:04:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11395 states to 11395 states and 16145 transitions. [2020-10-26 21:04:40,470 INFO L78 Accepts]: Start accepts. Automaton has 11395 states and 16145 transitions. Word has length 826 [2020-10-26 21:04:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:04:40,471 INFO L481 AbstractCegarLoop]: Abstraction has 11395 states and 16145 transitions. [2020-10-26 21:04:40,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:04:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 11395 states and 16145 transitions. [2020-10-26 21:04:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2020-10-26 21:04:40,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:04:40,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:04:40,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:04:40,514 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:04:40,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:04:40,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1128107520, now seen corresponding path program 1 times [2020-10-26 21:04:40,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:04:40,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405115825] [2020-10-26 21:04:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:04:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:40,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:40,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:41,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:45,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:45,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 933 [2020-10-26 21:04:45,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 21:04:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 21:04:45,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:04:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:04:45,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 21:04:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:45,939 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:04:45,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:04:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:45,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:45,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:04:45,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:45,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:04:45,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:04:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:04:45,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:04:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 21:04:46,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:04:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 21:04:46,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 21:04:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 21:04:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:04:46,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 21:04:46,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:46,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:04:46,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 21:04:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 21:04:46,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:46,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 21:04:46,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-26 21:04:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:46,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-10-26 21:04:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 21:04:46,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:46,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:04:46,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 21:04:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:46,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 121 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 21:04:46,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405115825] [2020-10-26 21:04:46,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:04:46,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:04:46,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315073889] [2020-10-26 21:04:46,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:04:46,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:04:46,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:04:46,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:04:46,789 INFO L87 Difference]: Start difference. First operand 11395 states and 16145 transitions. Second operand 8 states. [2020-10-26 21:04:46,925 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 21:04:55,909 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-26 21:05:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:05:01,490 INFO L93 Difference]: Finished difference Result 23971 states and 34663 transitions. [2020-10-26 21:05:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:05:01,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 909 [2020-10-26 21:05:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:05:01,543 INFO L225 Difference]: With dead ends: 23971 [2020-10-26 21:05:01,543 INFO L226 Difference]: Without dead ends: 13309 [2020-10-26 21:05:01,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:05:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13309 states. [2020-10-26 21:05:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13309 to 13177. [2020-10-26 21:05:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13177 states. [2020-10-26 21:05:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13177 states to 13177 states and 18081 transitions. [2020-10-26 21:05:01,990 INFO L78 Accepts]: Start accepts. Automaton has 13177 states and 18081 transitions. Word has length 909 [2020-10-26 21:05:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:05:01,990 INFO L481 AbstractCegarLoop]: Abstraction has 13177 states and 18081 transitions. [2020-10-26 21:05:01,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:05:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 13177 states and 18081 transitions. [2020-10-26 21:05:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2020-10-26 21:05:02,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:05:02,039 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:05:02,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 21:05:02,039 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:05:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:05:02,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2123057276, now seen corresponding path program 1 times [2020-10-26 21:05:02,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:05:02,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651591383] [2020-10-26 21:05:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:05:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:02,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:02,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:02,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:02,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:07,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 935 [2020-10-26 21:05:07,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 21:05:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 21:05:07,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 21:05:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:05:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-26 21:05:07,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:07,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:05:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:07,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:05:07,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:07,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 21:05:07,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:07,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:05:07,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:05:07,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:05:07,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:07,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:05:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:07,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:07,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:05:07,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:05:07,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:05:07,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:07,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:05:07,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:05:07,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:05:07,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:07,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:05:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:07,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 21:05:07,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:05:07,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 21:05:07,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:05:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:05:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 21:05:07,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 21:05:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:07,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:07,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 21:05:07,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:05:07,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 21:05:07,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:05:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:05:07,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 21:05:07,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:07,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 21:05:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:07,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:07,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 21:05:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 129 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-26 21:05:08,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651591383] [2020-10-26 21:05:08,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:05:08,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:05:08,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273705810] [2020-10-26 21:05:08,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:05:08,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:05:08,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:05:08,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:05:08,555 INFO L87 Difference]: Start difference. First operand 13177 states and 18081 transitions. Second operand 8 states. [2020-10-26 21:05:08,683 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:05:12,176 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 21:05:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:05:21,096 INFO L93 Difference]: Finished difference Result 37609 states and 53499 transitions. [2020-10-26 21:05:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 21:05:21,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 911 [2020-10-26 21:05:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:05:21,180 INFO L225 Difference]: With dead ends: 37609 [2020-10-26 21:05:21,181 INFO L226 Difference]: Without dead ends: 25165 [2020-10-26 21:05:21,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:05:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25165 states. [2020-10-26 21:05:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25165 to 22609. [2020-10-26 21:05:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22609 states. [2020-10-26 21:05:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22609 states to 22609 states and 29900 transitions. [2020-10-26 21:05:21,785 INFO L78 Accepts]: Start accepts. Automaton has 22609 states and 29900 transitions. Word has length 911 [2020-10-26 21:05:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:05:21,786 INFO L481 AbstractCegarLoop]: Abstraction has 22609 states and 29900 transitions. [2020-10-26 21:05:21,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:05:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22609 states and 29900 transitions. [2020-10-26 21:05:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1066 [2020-10-26 21:05:21,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:05:21,860 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:05:21,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 21:05:21,861 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:05:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:05:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1865201388, now seen corresponding path program 1 times [2020-10-26 21:05:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:05:21,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888025144] [2020-10-26 21:05:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:05:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:22,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:22,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:22,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1093 [2020-10-26 21:05:27,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 21:05:27,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-26 21:05:27,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:05:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-26 21:05:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:05:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:27,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:05:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:27,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:05:27,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:27,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:05:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:27,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:05:27,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:27,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 21:05:27,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:05:27,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:05:27,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:05:27,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:27,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:05:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 21:05:27,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 21:05:27,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:05:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:05:27,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 21:05:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:27,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-26 21:05:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:27,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 21:05:27,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:27,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 21:05:27,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:05:27,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-26 21:05:27,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:05:27,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:27,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-10-26 21:05:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 21:05:27,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:27,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 21:05:27,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:05:27,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 21:05:27,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:05:27,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:27,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-10-26 21:05:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:27,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 21:05:27,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:27,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 21:05:27,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:05:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-26 21:05:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:05:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:27,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-10-26 21:05:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:27,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:27,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:05:27,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 21:05:27,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:05:27,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 21:05:27,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:05:27,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:05:27,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 21:05:27,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:05:27,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:05:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 294 proven. 178 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-10-26 21:05:28,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888025144] [2020-10-26 21:05:28,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:05:28,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:05:28,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745252702] [2020-10-26 21:05:28,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:05:28,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:05:28,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:05:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:05:28,924 INFO L87 Difference]: Start difference. First operand 22609 states and 29900 transitions. Second operand 8 states. [2020-10-26 21:05:29,194 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:05:32,078 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-26 21:05:33,017 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-26 21:06:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:06:00,940 INFO L93 Difference]: Finished difference Result 96358 states and 135399 transitions. [2020-10-26 21:06:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 21:06:00,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1065 [2020-10-26 21:06:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:06:01,222 INFO L225 Difference]: With dead ends: 96358 [2020-10-26 21:06:01,223 INFO L226 Difference]: Without dead ends: 74482 [2020-10-26 21:06:01,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 21:06:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74482 states. [2020-10-26 21:06:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74482 to 74397. [2020-10-26 21:06:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74397 states. [2020-10-26 21:06:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74397 states to 74397 states and 99962 transitions. [2020-10-26 21:06:03,220 INFO L78 Accepts]: Start accepts. Automaton has 74397 states and 99962 transitions. Word has length 1065 [2020-10-26 21:06:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:06:03,221 INFO L481 AbstractCegarLoop]: Abstraction has 74397 states and 99962 transitions. [2020-10-26 21:06:03,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:06:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 74397 states and 99962 transitions. [2020-10-26 21:06:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2020-10-26 21:06:03,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:06:03,369 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:06:03,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 21:06:03,370 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:06:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:06:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1373666139, now seen corresponding path program 1 times [2020-10-26 21:06:03,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:06:03,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983174629] [2020-10-26 21:06:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:06:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:06:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:04,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:06,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1120 [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:06:08,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-26 21:06:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:06:08,810 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:06:08,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:06:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:06:08,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:08,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:06:08,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:06:08,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:06:08,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 21:06:08,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:06:08,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:06:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:06:08,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:06:08,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:06:08,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:06:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:06:08,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:08,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:08,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:06:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:06:08,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:06:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:06:09,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:09,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:06:09,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 21:06:09,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:06:09,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-26 21:06:09,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:06:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:06:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:06:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-26 21:06:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:06:09,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-10-26 21:06:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:06:09,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:09,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:06:09,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:06:09,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-10-26 21:06:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:06:09,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:09,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:06:09,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 21:06:09,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:06:09,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 21:06:09,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:06:09,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:06:09,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-26 21:06:09,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:06:09,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:06:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2020-10-26 21:06:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:06:09,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:06:09,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:06:09,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:06:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 319 proven. 169 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 21:06:10,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983174629] [2020-10-26 21:06:10,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:06:10,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:06:10,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909856735] [2020-10-26 21:06:10,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:06:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:06:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:06:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:06:10,485 INFO L87 Difference]: Start difference. First operand 74397 states and 99962 transitions. Second operand 8 states. [2020-10-26 21:06:10,624 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 95