/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/Problem17_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:20:37,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:20:37,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:20:37,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:20:37,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:20:37,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:20:37,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:20:37,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:20:37,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:20:37,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:20:37,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:20:37,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:20:37,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:20:37,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:20:37,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:20:37,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:20:37,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:20:37,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:20:37,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:20:37,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:20:37,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:20:37,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:20:37,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:20:37,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:20:37,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:20:37,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:20:37,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:20:37,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:20:37,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:20:37,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:20:37,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:20:37,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:20:37,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:20:37,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:20:37,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:20:37,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:20:37,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:20:37,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:20:37,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:20:37,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:20:37,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:20:37,718 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 [2020-10-27 00:20:37,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:20:37,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:20:37,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:20:37,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:20:37,792 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:20:37,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:20:37,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:20:37,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:20:37,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:20:37,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:20:37,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:20:37,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:20:37,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:20:37,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:20:37,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:20:37,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:20:37,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:20:37,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:20:37,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:20:37,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:20:37,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:20:37,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:20:37,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:20:37,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:20:37,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:20:37,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:20:37,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:20:37,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:20:37,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:20:37,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:20:38,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:20:38,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:20:38,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:20:38,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:20:38,386 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:20:38,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label57.c [2020-10-27 00:20:38,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe223b5b5/8ad28414862145c3acd4737745cc372c/FLAG67947f86b [2020-10-27 00:20:39,668 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:20:39,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label57.c [2020-10-27 00:20:39,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe223b5b5/8ad28414862145c3acd4737745cc372c/FLAG67947f86b [2020-10-27 00:20:40,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe223b5b5/8ad28414862145c3acd4737745cc372c [2020-10-27 00:20:40,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:20:40,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:20:40,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:20:40,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:20:40,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:20:40,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:20:40" (1/1) ... [2020-10-27 00:20:40,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f479f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:40, skipping insertion in model container [2020-10-27 00:20:40,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:20:40" (1/1) ... [2020-10-27 00:20:40,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:20:40,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:20:41,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:20:41,542 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:20:42,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:20:42,133 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:20:42,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42 WrapperNode [2020-10-27 00:20:42,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:20:42,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:20:42,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:20:42,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:20:42,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (1/1) ... [2020-10-27 00:20:42,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (1/1) ... [2020-10-27 00:20:42,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (1/1) ... [2020-10-27 00:20:42,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (1/1) ... [2020-10-27 00:20:42,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (1/1) ... [2020-10-27 00:20:42,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (1/1) ... [2020-10-27 00:20:42,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (1/1) ... [2020-10-27 00:20:42,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:20:42,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:20:42,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:20:42,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:20:42,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (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 [2020-10-27 00:20:42,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:20:42,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:20:42,614 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:20:42,614 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:20:42,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:20:42,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:20:42,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:20:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:20:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:20:42,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:20:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:20:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:20:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:20:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:20:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:20:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:20:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:20:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:20:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:20:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:20:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:20:52,767 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:20:52,768 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:20:52,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:20:52 BoogieIcfgContainer [2020-10-27 00:20:52,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:20:52,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:20:52,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:20:52,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:20:52,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:20:40" (1/3) ... [2020-10-27 00:20:52,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376d8a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:20:52, skipping insertion in model container [2020-10-27 00:20:52,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:20:42" (2/3) ... [2020-10-27 00:20:52,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376d8a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:20:52, skipping insertion in model container [2020-10-27 00:20:52,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:20:52" (3/3) ... [2020-10-27 00:20:52,783 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label57.c [2020-10-27 00:20:52,796 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:20:52,802 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:20:52,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:20:52,851 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:20:52,851 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:20:52,851 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:20:52,852 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:20:52,852 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:20:52,852 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:20:52,852 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:20:52,852 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:20:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:20:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 00:20:52,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:52,894 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] [2020-10-27 00:20:52,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash 568825922, now seen corresponding path program 1 times [2020-10-27 00:20:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:52,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254283222] [2020-10-27 00:20:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:53,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:53,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 00:20:53,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:53,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-27 00:20:53,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:20:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:53,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 00:20:53,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:20:53,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:53,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:53,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:53,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:53,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:53,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 00:20:53,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:53,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:20:53,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254283222] [2020-10-27 00:20:53,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:20:53,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:20:53,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026234927] [2020-10-27 00:20:53,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:20:53,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:20:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:20:53,965 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:21:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:09,383 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:21:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:21:09,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 00:21:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:09,427 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:21:09,428 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:21:09,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:21:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:21:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:21:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:21:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:21:09,582 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 24 [2020-10-27 00:21:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:09,583 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:21:09,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:21:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:21:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 00:21:09,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:09,589 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:09,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:21:09,590 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash 690498978, now seen corresponding path program 1 times [2020-10-27 00:21:09,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:09,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836605910] [2020-10-27 00:21:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:09,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:10,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:11,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 00:21:11,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-27 00:21:11,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:21:11,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:11,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:21:11,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:21:11,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:11,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:11,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 00:21:11,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:11,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:11,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:11,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:11,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:21:11,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:11,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:11,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:21:11,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:11,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 00:21:11,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:11,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:11,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:21:11,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:21:11,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836605910] [2020-10-27 00:21:11,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:21:11,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:21:11,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812195343] [2020-10-27 00:21:11,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:21:11,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:11,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:21:11,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:11,744 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:21:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:26,481 INFO L93 Difference]: Finished difference Result 2447 states and 3895 transitions. [2020-10-27 00:21:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:21:26,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-27 00:21:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:26,493 INFO L225 Difference]: With dead ends: 2447 [2020-10-27 00:21:26,493 INFO L226 Difference]: Without dead ends: 1461 [2020-10-27 00:21:26,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:21:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2020-10-27 00:21:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1433. [2020-10-27 00:21:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1433 states. [2020-10-27 00:21:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1859 transitions. [2020-10-27 00:21:26,577 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1859 transitions. Word has length 95 [2020-10-27 00:21:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:26,578 INFO L481 AbstractCegarLoop]: Abstraction has 1433 states and 1859 transitions. [2020-10-27 00:21:26,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:21:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1859 transitions. [2020-10-27 00:21:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 00:21:26,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:26,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:26,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:21:26,595 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash -716268689, now seen corresponding path program 1 times [2020-10-27 00:21:26,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:26,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292898488] [2020-10-27 00:21:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:27,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:27,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:21:27,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:27,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-27 00:21:27,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:21:27,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 00:21:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:27,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:27,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:27,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:27,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:27,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:27,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:21:27,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:27,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:27,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:27,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:27,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:27,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:27,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:27,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:21:27,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:27,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 00:21:27,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:27,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:21:27,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:21:27,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292898488] [2020-10-27 00:21:27,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:27,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:21:27,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629967619] [2020-10-27 00:21:27,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:21:27,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:21:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:21:27,447 INFO L87 Difference]: Start difference. First operand 1433 states and 1859 transitions. Second operand 5 states. [2020-10-27 00:21:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:44,016 INFO L93 Difference]: Finished difference Result 3331 states and 4572 transitions. [2020-10-27 00:21:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:21:44,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-27 00:21:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:44,032 INFO L225 Difference]: With dead ends: 3331 [2020-10-27 00:21:44,032 INFO L226 Difference]: Without dead ends: 1891 [2020-10-27 00:21:44,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:21:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-10-27 00:21:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1882. [2020-10-27 00:21:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-10-27 00:21:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2300 transitions. [2020-10-27 00:21:44,105 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2300 transitions. Word has length 98 [2020-10-27 00:21:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:44,106 INFO L481 AbstractCegarLoop]: Abstraction has 1882 states and 2300 transitions. [2020-10-27 00:21:44,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:21:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2300 transitions. [2020-10-27 00:21:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-27 00:21:44,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:44,110 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:44,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:21:44,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -278546562, now seen corresponding path program 1 times [2020-10-27 00:21:44,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:44,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752405587] [2020-10-27 00:21:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:44,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:45,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:45,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-27 00:21:45,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:45,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1585 [2020-10-27 00:21:45,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:21:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:21:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:45,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:45,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:45,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:45,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:45,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:45,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:21:45,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:45,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:45,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:46,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:46,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:46,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:46,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:46,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 00:21:46,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:21:46,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:46,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:46,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:46,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:46,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:21:46,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 00:21:46,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:21:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:21:46,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752405587] [2020-10-27 00:21:46,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:46,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:21:46,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305395903] [2020-10-27 00:21:46,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:21:46,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:21:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:46,636 INFO L87 Difference]: Start difference. First operand 1882 states and 2300 transitions. Second operand 7 states. [2020-10-27 00:22:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:03,048 INFO L93 Difference]: Finished difference Result 4684 states and 5937 transitions. [2020-10-27 00:22:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:22:03,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2020-10-27 00:22:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:03,072 INFO L225 Difference]: With dead ends: 4684 [2020-10-27 00:22:03,072 INFO L226 Difference]: Without dead ends: 3241 [2020-10-27 00:22:03,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:22:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2020-10-27 00:22:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 2792. [2020-10-27 00:22:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2792 states. [2020-10-27 00:22:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3420 transitions. [2020-10-27 00:22:03,216 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3420 transitions. Word has length 184 [2020-10-27 00:22:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:03,219 INFO L481 AbstractCegarLoop]: Abstraction has 2792 states and 3420 transitions. [2020-10-27 00:22:03,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:22:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3420 transitions. [2020-10-27 00:22:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-27 00:22:03,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:03,226 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:03,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:22:03,227 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash -972949478, now seen corresponding path program 1 times [2020-10-27 00:22:03,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:03,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983704283] [2020-10-27 00:22:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:03,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:06,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:07,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:07,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-27 00:22:07,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:22:07,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4209 [2020-10-27 00:22:07,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:07,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:22:07,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:22:07,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:22:07,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:07,797 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:22:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:07,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:07,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:07,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:07,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:07,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 00:22:07,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:07,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:07,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:07,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:22:07,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:07,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:07,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:08,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:08,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:08,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:08,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-27 00:22:08,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:08,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:22:08,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:08,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:22:08,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:08,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:08,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:08,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:22:08,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:08,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 00:22:08,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:08,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:08,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:08,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:22:08,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 36 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:22:08,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983704283] [2020-10-27 00:22:08,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:08,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:22:08,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434210952] [2020-10-27 00:22:08,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:22:08,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:08,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:22:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:22:08,998 INFO L87 Difference]: Start difference. First operand 2792 states and 3420 transitions. Second operand 10 states. [2020-10-27 00:22:09,171 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:22:10,338 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:22:14,380 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-27 00:22:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:36,907 INFO L93 Difference]: Finished difference Result 8103 states and 10389 transitions. [2020-10-27 00:22:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 00:22:36,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 186 [2020-10-27 00:22:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:36,942 INFO L225 Difference]: With dead ends: 8103 [2020-10-27 00:22:36,943 INFO L226 Difference]: Without dead ends: 5750 [2020-10-27 00:22:36,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2020-10-27 00:22:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5750 states. [2020-10-27 00:22:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5750 to 5185. [2020-10-27 00:22:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5185 states. [2020-10-27 00:22:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 6513 transitions. [2020-10-27 00:22:37,164 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 6513 transitions. Word has length 186 [2020-10-27 00:22:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:37,165 INFO L481 AbstractCegarLoop]: Abstraction has 5185 states and 6513 transitions. [2020-10-27 00:22:37,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:22:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 6513 transitions. [2020-10-27 00:22:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 00:22:37,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:37,169 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:37,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:22:37,169 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1531087280, now seen corresponding path program 1 times [2020-10-27 00:22:37,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:37,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090440485] [2020-10-27 00:22:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:37,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:38,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:38,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-27 00:22:38,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:22:38,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-27 00:22:38,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:22:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:22:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:22:38,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:38,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:38,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:38,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:38,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:38,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:38,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:22:38,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:38,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:38,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:38,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:38,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:38,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:38,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 00:22:38,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:38,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:22:38,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:22:38,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:38,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:38,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:39,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:39,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:22:39,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:22:39,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 00:22:39,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:39,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:39,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:39,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:22:39,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 97 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:22:39,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090440485] [2020-10-27 00:22:39,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:39,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:22:39,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644474272] [2020-10-27 00:22:39,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:22:39,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:39,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:22:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:22:39,333 INFO L87 Difference]: Start difference. First operand 5185 states and 6513 transitions. Second operand 6 states. [2020-10-27 00:22:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:52,662 INFO L93 Difference]: Finished difference Result 10440 states and 13441 transitions. [2020-10-27 00:22:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:22:52,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 197 [2020-10-27 00:22:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:52,696 INFO L225 Difference]: With dead ends: 10440 [2020-10-27 00:22:52,696 INFO L226 Difference]: Without dead ends: 5261 [2020-10-27 00:22:52,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:22:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2020-10-27 00:22:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5186. [2020-10-27 00:22:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5186 states. [2020-10-27 00:22:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 6490 transitions. [2020-10-27 00:22:52,921 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 6490 transitions. Word has length 197 [2020-10-27 00:22:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:52,922 INFO L481 AbstractCegarLoop]: Abstraction has 5186 states and 6490 transitions. [2020-10-27 00:22:52,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:22:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 6490 transitions. [2020-10-27 00:22:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-27 00:22:52,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:52,929 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:52,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:22:52,929 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:52,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1564365845, now seen corresponding path program 1 times [2020-10-27 00:22:52,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:52,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134176761] [2020-10-27 00:22:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:57,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:57,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-27 00:22:57,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:22:57,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4723 [2020-10-27 00:22:57,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:57,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:22:57,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:22:57,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 00:22:57,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:22:57,957 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:22:57,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:57,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:57,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:57,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:57,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:57,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:22:57,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:57,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:57,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:22:57,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:58,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:58,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:58,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:58,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:58,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 00:22:58,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:22:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:58,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:22:58,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:58,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:58,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:58,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:58,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:22:58,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:58,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 00:22:58,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:58,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:58,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:58,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:22:58,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:58,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-27 00:22:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:58,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:58,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:22:58,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:58,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 00:22:58,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:58,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:22:58,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:22:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 124 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:22:58,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134176761] [2020-10-27 00:22:58,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:58,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:22:58,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753095028] [2020-10-27 00:22:58,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:22:58,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:22:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:22:58,733 INFO L87 Difference]: Start difference. First operand 5186 states and 6490 transitions. Second operand 10 states. [2020-10-27 00:22:58,928 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 00:22:59,628 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:23:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:23:23,258 INFO L93 Difference]: Finished difference Result 15663 states and 21451 transitions. [2020-10-27 00:23:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 00:23:23,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 264 [2020-10-27 00:23:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:23:23,329 INFO L225 Difference]: With dead ends: 15663 [2020-10-27 00:23:23,330 INFO L226 Difference]: Without dead ends: 9580 [2020-10-27 00:23:23,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-10-27 00:23:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9580 states. [2020-10-27 00:23:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 9289. [2020-10-27 00:23:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9289 states. [2020-10-27 00:23:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9289 states to 9289 states and 11122 transitions. [2020-10-27 00:23:23,700 INFO L78 Accepts]: Start accepts. Automaton has 9289 states and 11122 transitions. Word has length 264 [2020-10-27 00:23:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:23:23,701 INFO L481 AbstractCegarLoop]: Abstraction has 9289 states and 11122 transitions. [2020-10-27 00:23:23,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:23:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9289 states and 11122 transitions. [2020-10-27 00:23:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 00:23:23,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:23:23,707 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:23:23,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:23:23,707 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:23:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:23:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash 591152140, now seen corresponding path program 1 times [2020-10-27 00:23:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:23:23,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837850739] [2020-10-27 00:23:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:23:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:23,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:26,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:28,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:28,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-27 00:23:28,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:23:28,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 00:23:28,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:28,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:23:28,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:23:28,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 00:23:28,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:28,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:23:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:28,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:29,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:29,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:23:29,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:23:29,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:29,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:23:29,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:23:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:23:29,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:29,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:23:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:29,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:29,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:29,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:23:29,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:29,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 00:23:29,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:29,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:23:29,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:29,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:23:29,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:29,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:23:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:29,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:29,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:29,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:23:29,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:29,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 00:23:29,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:29,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:23:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:23:29,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:23:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:29,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:29,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:29,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:23:29,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:29,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 00:23:29,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:23:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:29,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:23:29,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 129 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:23:30,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837850739] [2020-10-27 00:23:30,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:23:30,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:23:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209437506] [2020-10-27 00:23:30,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 00:23:30,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:23:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 00:23:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:23:30,076 INFO L87 Difference]: Start difference. First operand 9289 states and 11122 transitions. Second operand 11 states. [2020-10-27 00:23:30,319 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 00:23:36,664 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:23:37,761 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:23:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:23:52,963 INFO L93 Difference]: Finished difference Result 21943 states and 27950 transitions. [2020-10-27 00:23:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 00:23:52,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 272 [2020-10-27 00:23:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:23:53,019 INFO L225 Difference]: With dead ends: 21943 [2020-10-27 00:23:53,019 INFO L226 Difference]: Without dead ends: 12640 [2020-10-27 00:23:53,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-10-27 00:23:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12640 states. [2020-10-27 00:23:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12640 to 12365. [2020-10-27 00:23:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12365 states. [2020-10-27 00:23:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12365 states to 12365 states and 14555 transitions. [2020-10-27 00:23:53,383 INFO L78 Accepts]: Start accepts. Automaton has 12365 states and 14555 transitions. Word has length 272 [2020-10-27 00:23:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:23:53,384 INFO L481 AbstractCegarLoop]: Abstraction has 12365 states and 14555 transitions. [2020-10-27 00:23:53,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 00:23:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 12365 states and 14555 transitions. [2020-10-27 00:23:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 00:23:53,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:23:53,390 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 00:23:53,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:23:53,391 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:23:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:23:53,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1696945171, now seen corresponding path program 1 times [2020-10-27 00:23:53,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:23:53,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957301201] [2020-10-27 00:23:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:23:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:53,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:53,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:56,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:58,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:58,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-27 00:23:58,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:23:58,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 00:23:58,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:23:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:23:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:23:58,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:23:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:58,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:58,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:58,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:23:58,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:58,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:23:58,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:58,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:23:58,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:23:58,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:23:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 41 [2020-10-27 00:23:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:23:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:58,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:58,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:23:58,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:58,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 00:23:58,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:23:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:23:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:23:58,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:58,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:23:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:58,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:59,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:59,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:23:59,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:59,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-27 00:23:59,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:23:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:23:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:23:59,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:59,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:23:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:59,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:59,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:23:59,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:23:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:23:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 00:23:59,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:23:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:23:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:23:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:23:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:23:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 136 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:23:59,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957301201] [2020-10-27 00:23:59,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:23:59,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:23:59,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931707936] [2020-10-27 00:23:59,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:23:59,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:23:59,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:23:59,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:23:59,836 INFO L87 Difference]: Start difference. First operand 12365 states and 14555 transitions. Second operand 7 states. [2020-10-27 00:24:00,883 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:24:07,279 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:24:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:24:20,662 INFO L93 Difference]: Finished difference Result 26163 states and 30912 transitions. [2020-10-27 00:24:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:24:20,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 295 [2020-10-27 00:24:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:24:20,722 INFO L225 Difference]: With dead ends: 26163 [2020-10-27 00:24:20,722 INFO L226 Difference]: Without dead ends: 14672 [2020-10-27 00:24:20,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:24:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14672 states. [2020-10-27 00:24:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14672 to 14577. [2020-10-27 00:24:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14577 states. [2020-10-27 00:24:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14577 states to 14577 states and 16985 transitions. [2020-10-27 00:24:21,139 INFO L78 Accepts]: Start accepts. Automaton has 14577 states and 16985 transitions. Word has length 295 [2020-10-27 00:24:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:24:21,140 INFO L481 AbstractCegarLoop]: Abstraction has 14577 states and 16985 transitions. [2020-10-27 00:24:21,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:24:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 14577 states and 16985 transitions. [2020-10-27 00:24:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-27 00:24:21,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:24:21,149 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:24:21,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:24:21,150 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:24:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:24:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1192562268, now seen corresponding path program 1 times [2020-10-27 00:24:21,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:24:21,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010031605] [2020-10-27 00:24:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:24:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:24:21,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:22,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:23,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:24:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking...