/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/Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:48:25,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:48:25,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:48:25,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:48:25,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:48:25,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:48:25,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:48:25,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:48:25,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:48:25,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:48:25,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:48:25,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:48:25,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:48:25,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:48:25,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:48:25,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:48:25,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:48:25,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:48:25,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:48:25,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:48:25,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:48:25,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:48:25,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:48:25,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:48:25,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:48:25,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:48:25,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:48:25,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:48:25,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:48:25,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:48:25,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:48:25,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:48:25,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:48:25,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:48:25,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:48:25,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:48:25,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:48:25,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:48:25,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:48:25,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:48:25,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:48:25,825 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 22:48:25,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:48:25,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:48:25,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:48:25,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:48:25,855 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:48:25,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:48:25,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:48:25,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:48:25,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:48:25,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:48:25,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:48:25,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:48:25,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:48:25,858 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:48:25,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:48:25,859 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:48:25,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:48:25,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:48:25,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:48:25,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:48:25,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:48:25,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:48:25,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:48:25,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:48:25,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:48:25,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:48:25,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:48:25,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:48:25,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:48:25,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:48:26,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:48:26,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:48:26,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:48:26,274 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:48:26,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:48:26,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label08.c [2020-10-26 22:48:26,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00c71c34f/9efdd8c35a744167871cce034f48a80c/FLAG8454dbea5 [2020-10-26 22:48:27,327 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:48:27,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label08.c [2020-10-26 22:48:27,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00c71c34f/9efdd8c35a744167871cce034f48a80c/FLAG8454dbea5 [2020-10-26 22:48:27,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00c71c34f/9efdd8c35a744167871cce034f48a80c [2020-10-26 22:48:27,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:48:27,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:48:27,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:48:27,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:48:27,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:48:27,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:48:27" (1/1) ... [2020-10-26 22:48:27,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3965b1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:27, skipping insertion in model container [2020-10-26 22:48:27,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:48:27" (1/1) ... [2020-10-26 22:48:27,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:48:28,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:48:29,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:48:29,521 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:48:30,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:48:30,253 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:48:30,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30 WrapperNode [2020-10-26 22:48:30,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:48:30,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:48:30,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:48:30,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:48:30,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (1/1) ... [2020-10-26 22:48:30,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (1/1) ... [2020-10-26 22:48:30,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (1/1) ... [2020-10-26 22:48:30,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (1/1) ... [2020-10-26 22:48:30,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (1/1) ... [2020-10-26 22:48:30,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (1/1) ... [2020-10-26 22:48:30,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (1/1) ... [2020-10-26 22:48:30,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:48:30,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:48:30,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:48:30,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:48:30,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (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 22:48:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:48:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:48:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:48:30,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:48:30,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:48:30,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:48:30,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:48:30,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:48:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:48:30,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:48:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:48:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:48:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:48:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:48:30,695 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:48:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:48:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:48:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:48:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:48:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:48:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:48:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:48:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:48:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:48:30,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:48:37,475 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:48:37,476 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:48:37,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:48:37 BoogieIcfgContainer [2020-10-26 22:48:37,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:48:37,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:48:37,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:48:37,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:48:37,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:48:27" (1/3) ... [2020-10-26 22:48:37,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:48:37, skipping insertion in model container [2020-10-26 22:48:37,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:48:30" (2/3) ... [2020-10-26 22:48:37,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:48:37, skipping insertion in model container [2020-10-26 22:48:37,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:48:37" (3/3) ... [2020-10-26 22:48:37,493 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label08.c [2020-10-26 22:48:37,506 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:48:37,512 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:48:37,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:48:37,574 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:48:37,574 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:48:37,574 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:48:37,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:48:37,574 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:48:37,575 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:48:37,575 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:48:37,575 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:48:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:48:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 22:48:37,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:37,627 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] [2020-10-26 22:48:37,628 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 386783980, now seen corresponding path program 1 times [2020-10-26 22:48:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:37,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350788027] [2020-10-26 22:48:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:37,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:38,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:38,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 22:48:38,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-26 22:48:38,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:38,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:38,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 22:48:38,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:48:38,561 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:48:38,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:38,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:38,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:38,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:38,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:38,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 22:48:38,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:38,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:38,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:38,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:38,634 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 22:48:38,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350788027] [2020-10-26 22:48:38,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:38,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:48:38,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884111858] [2020-10-26 22:48:38,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:48:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:48:38,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:48:38,670 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:48:38,840 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:48:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:52,756 INFO L93 Difference]: Finished difference Result 2476 states and 4741 transitions. [2020-10-26 22:48:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:48:52,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-26 22:48:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:52,799 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:48:52,799 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:48:52,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:48:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:48:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1556. [2020-10-26 22:48:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1556 states. [2020-10-26 22:48:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 2404 transitions. [2020-10-26 22:48:52,979 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 2404 transitions. Word has length 36 [2020-10-26 22:48:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:52,980 INFO L481 AbstractCegarLoop]: Abstraction has 1556 states and 2404 transitions. [2020-10-26 22:48:52,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:48:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 2404 transitions. [2020-10-26 22:48:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 22:48:52,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:52,990 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:48:52,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:48:52,991 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 286350122, now seen corresponding path program 1 times [2020-10-26 22:48:52,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:52,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043674878] [2020-10-26 22:48:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:53,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:53,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:53,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:53,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:48:53,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:53,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-26 22:48:53,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:53,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:48:53,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:53,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:48:53,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:48:54,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:54,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:54,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:54,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:54,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:48:54,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:54,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:54,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 22:48:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:54,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:54,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:48:54,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 22:48:54,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:48:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:48:54,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043674878] [2020-10-26 22:48:54,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:54,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:48:54,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061267641] [2020-10-26 22:48:54,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:48:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:48:54,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:48:54,412 INFO L87 Difference]: Start difference. First operand 1556 states and 2404 transitions. Second operand 6 states. [2020-10-26 22:48:54,566 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 22:49:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:10,422 INFO L93 Difference]: Finished difference Result 4721 states and 7349 transitions. [2020-10-26 22:49:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:49:10,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-10-26 22:49:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:10,446 INFO L225 Difference]: With dead ends: 4721 [2020-10-26 22:49:10,446 INFO L226 Difference]: Without dead ends: 3171 [2020-10-26 22:49:10,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 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 22:49:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2020-10-26 22:49:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3150. [2020-10-26 22:49:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3150 states. [2020-10-26 22:49:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4314 transitions. [2020-10-26 22:49:10,561 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4314 transitions. Word has length 111 [2020-10-26 22:49:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:10,564 INFO L481 AbstractCegarLoop]: Abstraction has 3150 states and 4314 transitions. [2020-10-26 22:49:10,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:49:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4314 transitions. [2020-10-26 22:49:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 22:49:10,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:10,567 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:49:10,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:49:10,568 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1339829342, now seen corresponding path program 1 times [2020-10-26 22:49:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:10,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331550677] [2020-10-26 22:49:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:10,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:11,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:11,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 22:49:11,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:11,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-26 22:49:11,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:11,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:11,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:49:11,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 22:49:11,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:11,943 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:49:11,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:11,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:11,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:11,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:11,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:11,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:49:11,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:49:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:12,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:12,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:12,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 22:49:12,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:12,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-26 22:49:12,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 22:49:12,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:49:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331550677] [2020-10-26 22:49:12,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:49:12,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:49:12,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690343405] [2020-10-26 22:49:12,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:12,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:12,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:12,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:12,350 INFO L87 Difference]: Start difference. First operand 3150 states and 4314 transitions. Second operand 7 states. [2020-10-26 22:49:12,499 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:49:15,651 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:49:30,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:30,821 INFO L93 Difference]: Finished difference Result 9640 states and 13375 transitions. [2020-10-26 22:49:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:49:30,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-10-26 22:49:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:30,859 INFO L225 Difference]: With dead ends: 9640 [2020-10-26 22:49:30,860 INFO L226 Difference]: Without dead ends: 6496 [2020-10-26 22:49:30,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:49:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6496 states. [2020-10-26 22:49:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6496 to 6423. [2020-10-26 22:49:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6423 states. [2020-10-26 22:49:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6423 states to 6423 states and 8228 transitions. [2020-10-26 22:49:31,084 INFO L78 Accepts]: Start accepts. Automaton has 6423 states and 8228 transitions. Word has length 117 [2020-10-26 22:49:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:31,085 INFO L481 AbstractCegarLoop]: Abstraction has 6423 states and 8228 transitions. [2020-10-26 22:49:31,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6423 states and 8228 transitions. [2020-10-26 22:49:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-26 22:49:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:31,096 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:49:31,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:49:31,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash -172856764, now seen corresponding path program 1 times [2020-10-26 22:49:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:31,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035200032] [2020-10-26 22:49:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:31,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:32,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:32,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-26 22:49:32,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:32,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1663 [2020-10-26 22:49:32,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:49:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:49:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:33,009 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:49:33,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:33,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:33,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:33,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:33,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:49:33,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:33,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:49:33,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:49:33,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:33,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:33,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:33,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:49:33,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:33,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-26 22:49:33,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:33,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:33,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:33,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:49:33,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:49:33,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035200032] [2020-10-26 22:49:33,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:49:33,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:49:33,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330294965] [2020-10-26 22:49:33,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:33,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:33,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:33,806 INFO L87 Difference]: Start difference. First operand 6423 states and 8228 transitions. Second operand 7 states. [2020-10-26 22:49:33,981 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-26 22:49:36,001 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 22:49:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:51,550 INFO L93 Difference]: Finished difference Result 16277 states and 20593 transitions. [2020-10-26 22:49:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:49:51,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2020-10-26 22:49:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:51,596 INFO L225 Difference]: With dead ends: 16277 [2020-10-26 22:49:51,596 INFO L226 Difference]: Without dead ends: 9860 [2020-10-26 22:49:51,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:49:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9860 states. [2020-10-26 22:49:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9860 to 8915. [2020-10-26 22:49:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8915 states. [2020-10-26 22:49:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8915 states to 8915 states and 10929 transitions. [2020-10-26 22:49:51,892 INFO L78 Accepts]: Start accepts. Automaton has 8915 states and 10929 transitions. Word has length 184 [2020-10-26 22:49:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:51,894 INFO L481 AbstractCegarLoop]: Abstraction has 8915 states and 10929 transitions. [2020-10-26 22:49:51,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 8915 states and 10929 transitions. [2020-10-26 22:49:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 22:49:51,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:51,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:51,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:49:51,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:51,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1405821230, now seen corresponding path program 1 times [2020-10-26 22:49:51,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:51,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389283626] [2020-10-26 22:49:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:53,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:53,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 22:49:53,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:49:53,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1474 [2020-10-26 22:49:53,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:53,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:53,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:49:53,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 22:49:53,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:53,663 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:49:53,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:53,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:53,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:53,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:53,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:53,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:49:53,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:49:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:49:53,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:53,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:53,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:53,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:49:53,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:53,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 22:49:53,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:49:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 22:49:53,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:49:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:54,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:54,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:54,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 22:49:54,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-26 22:49:54,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 22:49:54,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:49:54,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389283626] [2020-10-26 22:49:54,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:49:54,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:49:54,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603325469] [2020-10-26 22:49:54,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:49:54,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:49:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:49:54,358 INFO L87 Difference]: Start difference. First operand 8915 states and 10929 transitions. Second operand 7 states. [2020-10-26 22:49:55,086 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 22:50:04,037 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:09,536 INFO L93 Difference]: Finished difference Result 18631 states and 22929 transitions. [2020-10-26 22:50:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:50:09,543 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-26 22:50:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:09,590 INFO L225 Difference]: With dead ends: 18631 [2020-10-26 22:50:09,590 INFO L226 Difference]: Without dead ends: 9318 [2020-10-26 22:50:09,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:50:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9318 states. [2020-10-26 22:50:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9318 to 8912. [2020-10-26 22:50:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8912 states. [2020-10-26 22:50:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8912 states to 8912 states and 10563 transitions. [2020-10-26 22:50:09,849 INFO L78 Accepts]: Start accepts. Automaton has 8912 states and 10563 transitions. Word has length 219 [2020-10-26 22:50:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:09,850 INFO L481 AbstractCegarLoop]: Abstraction has 8912 states and 10563 transitions. [2020-10-26 22:50:09,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:50:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 8912 states and 10563 transitions. [2020-10-26 22:50:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-26 22:50:09,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:09,855 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:09,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:50:09,855 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1243668836, now seen corresponding path program 1 times [2020-10-26 22:50:09,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:09,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622484261] [2020-10-26 22:50:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:10,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:11,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:11,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-26 22:50:11,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:11,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-26 22:50:11,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:11,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:50:11,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:50:11,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:50:11,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:11,496 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:50:11,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:11,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:11,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:11,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:11,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 22:50:11,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:11,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:11,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:11,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:11,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:11,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:11,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:11,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:11,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:50:11,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:11,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 22:50:11,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:50:11,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:11,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:50:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:11,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:11,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:11,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:50:11,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:11,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 22:50:11,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:11,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:11,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:50:11,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:50:12,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622484261] [2020-10-26 22:50:12,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:12,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:50:12,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949432429] [2020-10-26 22:50:12,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:50:12,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:12,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:50:12,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:50:12,107 INFO L87 Difference]: Start difference. First operand 8912 states and 10563 transitions. Second operand 6 states. [2020-10-26 22:50:12,306 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:28,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:28,299 INFO L93 Difference]: Finished difference Result 21285 states and 26181 transitions. [2020-10-26 22:50:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:50:28,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 270 [2020-10-26 22:50:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:28,342 INFO L225 Difference]: With dead ends: 21285 [2020-10-26 22:50:28,342 INFO L226 Difference]: Without dead ends: 12379 [2020-10-26 22:50:28,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:50:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12379 states. [2020-10-26 22:50:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12379 to 12238. [2020-10-26 22:50:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12238 states. [2020-10-26 22:50:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12238 states to 12238 states and 14861 transitions. [2020-10-26 22:50:28,681 INFO L78 Accepts]: Start accepts. Automaton has 12238 states and 14861 transitions. Word has length 270 [2020-10-26 22:50:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:28,682 INFO L481 AbstractCegarLoop]: Abstraction has 12238 states and 14861 transitions. [2020-10-26 22:50:28,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:50:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 12238 states and 14861 transitions. [2020-10-26 22:50:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-26 22:50:28,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:28,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:28,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:50:28,692 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:28,692 INFO L82 PathProgramCache]: Analyzing trace with hash 715098660, now seen corresponding path program 1 times [2020-10-26 22:50:28,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:28,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949716470] [2020-10-26 22:50:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:28,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:28,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:30,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:30,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 22:50:30,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:30,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2074 [2020-10-26 22:50:30,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:50:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 22:50:30,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:31,028 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:50:31,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:31,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:31,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:31,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:31,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:50:31,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:31,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:31,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:31,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:31,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 22:50:31,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:31,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:31,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:50:31,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:31,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:31,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:31,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:31,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:50:31,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:31,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 22:50:31,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:31,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:31,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:31,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:50:31,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:50:31,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949716470] [2020-10-26 22:50:31,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:31,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:50:31,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064407134] [2020-10-26 22:50:31,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:50:31,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:31,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:50:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:50:31,651 INFO L87 Difference]: Start difference. First operand 12238 states and 14861 transitions. Second operand 7 states. [2020-10-26 22:50:33,215 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:38,454 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:52,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:52,009 INFO L93 Difference]: Finished difference Result 28222 states and 35356 transitions. [2020-10-26 22:50:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:50:52,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 274 [2020-10-26 22:50:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:52,073 INFO L225 Difference]: With dead ends: 28222 [2020-10-26 22:50:52,073 INFO L226 Difference]: Without dead ends: 15990 [2020-10-26 22:50:52,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:50:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15990 states. [2020-10-26 22:50:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15990 to 15743. [2020-10-26 22:50:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15743 states. [2020-10-26 22:50:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15743 states to 15743 states and 19229 transitions. [2020-10-26 22:50:52,478 INFO L78 Accepts]: Start accepts. Automaton has 15743 states and 19229 transitions. Word has length 274 [2020-10-26 22:50:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:52,479 INFO L481 AbstractCegarLoop]: Abstraction has 15743 states and 19229 transitions. [2020-10-26 22:50:52,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:50:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15743 states and 19229 transitions. [2020-10-26 22:50:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 22:50:52,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:52,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 22:50:52,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:50:52,486 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:52,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1955611284, now seen corresponding path program 1 times [2020-10-26 22:50:52,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:52,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568239610] [2020-10-26 22:50:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:52,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:52,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:55,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:55,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-26 22:50:55,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:55,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2886 [2020-10-26 22:50:55,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 22:50:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:50:55,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 307 [2020-10-26 22:50:55,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:55,643 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:50:55,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:55,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:55,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:55,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:55,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:55,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:50:55,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:55,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:55,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:50:55,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:55,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:55,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:55,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:56,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:56,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:56,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:56,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-26 22:50:56,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:56,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:56,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-26 22:50:56,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:56,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:56,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:56,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:56,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:56,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 22:50:56,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:56,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-26 22:50:56,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:56,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:56,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:56,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 22:50:56,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 136 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 22:50:56,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568239610] [2020-10-26 22:50:56,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:56,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:50:56,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390906796] [2020-10-26 22:50:56,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:50:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:50:56,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:50:56,781 INFO L87 Difference]: Start difference. First operand 15743 states and 19229 transitions. Second operand 8 states. [2020-10-26 22:50:56,943 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:58,392 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:51:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:51:21,703 INFO L93 Difference]: Finished difference Result 58350 states and 77158 transitions. [2020-10-26 22:51:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:51:21,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 302 [2020-10-26 22:51:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:51:21,849 INFO L225 Difference]: With dead ends: 58350 [2020-10-26 22:51:21,849 INFO L226 Difference]: Without dead ends: 42613 [2020-10-26 22:51:21,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:51:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42613 states. [2020-10-26 22:51:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42613 to 38584. [2020-10-26 22:51:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38584 states. [2020-10-26 22:51:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 48942 transitions. [2020-10-26 22:51:22,957 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 48942 transitions. Word has length 302 [2020-10-26 22:51:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:51:22,958 INFO L481 AbstractCegarLoop]: Abstraction has 38584 states and 48942 transitions. [2020-10-26 22:51:22,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:51:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 48942 transitions. [2020-10-26 22:51:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-26 22:51:22,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:51:22,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 22:51:22,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:51:22,965 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:51:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:51:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash 140643812, now seen corresponding path program 1 times [2020-10-26 22:51:22,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:51:22,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587679582] [2020-10-26 22:51:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:51:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:23,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:23,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:23,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-26 22:51:23,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-26 22:51:23,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:51:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 282 [2020-10-26 22:51:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 22:51:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:23,737 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:51:23,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:51:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:23,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:23,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:23,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:51:23,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:23,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:51:23,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:23,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:23,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:23,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:23,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:51:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:23,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:23,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:51:23,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:23,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 22:51:23,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:23,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:23,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:24,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:51:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:24,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:24,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:24,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 22:51:24,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:24,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 22:51:24,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:51:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:24,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 22:51:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-26 22:51:24,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587679582] [2020-10-26 22:51:24,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:51:24,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:51:24,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218261686] [2020-10-26 22:51:24,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:51:24,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:51:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:51:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:51:24,410 INFO L87 Difference]: Start difference. First operand 38584 states and 48942 transitions. Second operand 5 states. [2020-10-26 22:51:26,290 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:51:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:51:42,068 INFO L93 Difference]: Finished difference Result 94972 states and 125027 transitions. [2020-10-26 22:51:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:51:42,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 306 [2020-10-26 22:51:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:51:42,259 INFO L225 Difference]: With dead ends: 94972 [2020-10-26 22:51:42,260 INFO L226 Difference]: Without dead ends: 56394 [2020-10-26 22:51:42,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:51:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56394 states. [2020-10-26 22:51:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56394 to 56306. [2020-10-26 22:51:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56306 states. [2020-10-26 22:51:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56306 states to 56306 states and 69170 transitions. [2020-10-26 22:51:44,229 INFO L78 Accepts]: Start accepts. Automaton has 56306 states and 69170 transitions. Word has length 306 [2020-10-26 22:51:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:51:44,230 INFO L481 AbstractCegarLoop]: Abstraction has 56306 states and 69170 transitions. [2020-10-26 22:51:44,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:51:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 56306 states and 69170 transitions. [2020-10-26 22:51:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-26 22:51:44,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:51:44,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 22:51:44,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:51:44,239 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:51:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:51:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1942000314, now seen corresponding path program 1 times [2020-10-26 22:51:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:51:44,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596726251] [2020-10-26 22:51:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:51:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:44,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:44,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:44,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-26 22:51:44,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:44,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-26 22:51:44,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:51:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 297 [2020-10-26 22:51:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 22:51:44,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:45,220 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:51:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:51:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:45,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:45,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:45,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:51:45,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:51:45,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:45,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:51:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:45,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:45,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:45,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:51:45,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:45,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:51:45,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:45,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:51:45,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:45,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:51:45,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:45,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:51:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:51:45,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:51:45,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:51:45,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 22:51:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:51:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 22:51:45,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:51:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:51:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:51:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-26 22:51:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:51:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-26 22:51:45,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596726251] [2020-10-26 22:51:45,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:51:45,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:51:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187928081] [2020-10-26 22:51:45,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:51:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:51:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:51:45,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:51:45,728 INFO L87 Difference]: Start difference. First operand 56306 states and 69170 transitions. Second operand 6 states. [2020-10-26 22:51:45,911 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:51:47,686 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:52:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:52:11,857 INFO L93 Difference]: Finished difference Result 130570 states and 166037 transitions. [2020-10-26 22:52:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:52:11,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 321 [2020-10-26 22:52:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:52:12,149 INFO L225 Difference]: With dead ends: 130570 [2020-10-26 22:52:12,150 INFO L226 Difference]: Without dead ends: 74270 [2020-10-26 22:52:12,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:52:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74270 states. [2020-10-26 22:52:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74270 to 73446. [2020-10-26 22:52:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73446 states. [2020-10-26 22:52:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73446 states to 73446 states and 93108 transitions. [2020-10-26 22:52:15,087 INFO L78 Accepts]: Start accepts. Automaton has 73446 states and 93108 transitions. Word has length 321 [2020-10-26 22:52:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:52:15,088 INFO L481 AbstractCegarLoop]: Abstraction has 73446 states and 93108 transitions. [2020-10-26 22:52:15,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:52:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 73446 states and 93108 transitions. [2020-10-26 22:52:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-10-26 22:52:15,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:52:15,117 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:15,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:52:15,117 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:52:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:52:15,118 INFO L82 PathProgramCache]: Analyzing trace with hash 992500334, now seen corresponding path program 1 times [2020-10-26 22:52:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:52:15,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710057140] [2020-10-26 22:52:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:52:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:52:15,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:52:15,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking...