/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/Problem13_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:13:12,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:13:12,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:13:12,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:13:12,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:13:12,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:13:12,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:13:12,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:13:12,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:13:12,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:13:12,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:13:12,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:13:12,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:13:12,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:13:12,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:13:12,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:13:12,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:13:12,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:13:12,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:13:12,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:13:12,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:13:12,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:13:12,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:13:12,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:13:12,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:13:12,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:13:12,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:13:12,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:13:12,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:13:12,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:13:12,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:13:12,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:13:12,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:13:12,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:13:12,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:13:12,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:13:12,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:13:12,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:13:12,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:13:12,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:13:12,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:13:12,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:13:12,773 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:13:12,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:13:12,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:13:12,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:13:12,776 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:13:12,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:13:12,777 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:13:12,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:13:12,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:13:12,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:13:12,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:13:12,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:13:12,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:13:12,779 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:13:12,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:13:12,780 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:13:12,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:13:12,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:13:12,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:13:12,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:13:12,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:13:12,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:13:12,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:13:12,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:13:12,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:13:12,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:13:12,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:13:12,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:13:12,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:13:12,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:13:13,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:13:13,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:13:13,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:13:13,222 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:13:13,223 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:13:13,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label39.c [2020-10-26 23:13:13,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db758b06c/92f5a0b250644764a6c7eab26f74fee1/FLAGecc2dfdbe [2020-10-26 23:13:14,497 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:13:14,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label39.c [2020-10-26 23:13:14,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db758b06c/92f5a0b250644764a6c7eab26f74fee1/FLAGecc2dfdbe [2020-10-26 23:13:14,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db758b06c/92f5a0b250644764a6c7eab26f74fee1 [2020-10-26 23:13:14,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:13:14,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:13:14,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:13:14,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:13:14,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:13:14,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:13:14" (1/1) ... [2020-10-26 23:13:14,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4ab53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:14, skipping insertion in model container [2020-10-26 23:13:14,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:13:14" (1/1) ... [2020-10-26 23:13:14,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:13:15,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:13:16,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:13:16,898 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:13:17,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:13:17,705 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:13:17,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17 WrapperNode [2020-10-26 23:13:17,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:13:17,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:13:17,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:13:17,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:13:17,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... [2020-10-26 23:13:17,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... [2020-10-26 23:13:17,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... [2020-10-26 23:13:17,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... [2020-10-26 23:13:18,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... [2020-10-26 23:13:18,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... [2020-10-26 23:13:18,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... [2020-10-26 23:13:18,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:13:18,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:13:18,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:13:18,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:13:18,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:13:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:13:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:13:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:13:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:13:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:13:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:13:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:13:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:13:18,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:13:18,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:13:18,312 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:13:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:13:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:13:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:13:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:13:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:13:18,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:13:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:13:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:13:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:13:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:13:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:13:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:13:18,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:13:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:13:28,732 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:13:28,733 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:13:28,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:13:28 BoogieIcfgContainer [2020-10-26 23:13:28,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:13:28,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:13:28,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:13:28,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:13:28,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:13:14" (1/3) ... [2020-10-26 23:13:28,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b402395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:13:28, skipping insertion in model container [2020-10-26 23:13:28,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:13:17" (2/3) ... [2020-10-26 23:13:28,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b402395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:13:28, skipping insertion in model container [2020-10-26 23:13:28,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:13:28" (3/3) ... [2020-10-26 23:13:28,751 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label39.c [2020-10-26 23:13:28,765 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:13:28,773 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:13:28,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:13:28,832 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:13:28,832 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:13:28,832 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:13:28,832 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:13:28,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:13:28,833 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:13:28,833 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:13:28,833 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:13:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:13:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 23:13:28,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:28,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:28,889 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash -619813366, now seen corresponding path program 1 times [2020-10-26 23:13:28,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:28,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770648904] [2020-10-26 23:13:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:29,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:29,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 23:13:29,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:29,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-26 23:13:29,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 23:13:29,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:13:30,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:30,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:30,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:30,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:30,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:30,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 23:13:30,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:30,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:13:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770648904] [2020-10-26 23:13:30,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:13:30,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:13:30,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380581352] [2020-10-26 23:13:30,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:13:30,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:30,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:13:30,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:13:30,177 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:13:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:13:47,467 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-26 23:13:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:13:47,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-26 23:13:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:13:47,519 INFO L225 Difference]: With dead ends: 3235 [2020-10-26 23:13:47,519 INFO L226 Difference]: Without dead ends: 2027 [2020-10-26 23:13:47,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:13:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-26 23:13:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-26 23:13:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-26 23:13:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-26 23:13:47,785 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 58 [2020-10-26 23:13:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:13:47,788 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-26 23:13:47,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:13:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-26 23:13:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 23:13:47,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:13:47,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:13:47,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:13:47,806 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:13:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:13:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1518425278, now seen corresponding path program 1 times [2020-10-26 23:13:47,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:13:47,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285908290] [2020-10-26 23:13:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:13:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:48,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:49,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:50,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:50,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-26 23:13:50,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:13:50,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2979 [2020-10-26 23:13:50,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:13:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:13:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:13:50,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:13:51,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:13:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:51,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:51,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:51,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:13:51,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:51,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:13:51,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:51,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:13:51,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:13:51,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:13:51,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:13:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:13:51,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:13:51,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:13:51,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:13:51,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:13:51,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 23:13:51,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:13:51,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:13:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:13:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:13:51,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:13:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:13:51,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285908290] [2020-10-26 23:13:51,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:13:51,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:13:51,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326848565] [2020-10-26 23:13:51,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:13:51,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:13:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:13:51,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:13:51,484 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-26 23:14:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:18,687 INFO L93 Difference]: Finished difference Result 5840 states and 9681 transitions. [2020-10-26 23:14:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:14:18,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-26 23:14:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:18,716 INFO L225 Difference]: With dead ends: 5840 [2020-10-26 23:14:18,717 INFO L226 Difference]: Without dead ends: 3836 [2020-10-26 23:14:18,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:14:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2020-10-26 23:14:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3696. [2020-10-26 23:14:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3696 states. [2020-10-26 23:14:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5278 transitions. [2020-10-26 23:14:18,870 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5278 transitions. Word has length 133 [2020-10-26 23:14:18,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:18,871 INFO L481 AbstractCegarLoop]: Abstraction has 3696 states and 5278 transitions. [2020-10-26 23:14:18,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5278 transitions. [2020-10-26 23:14:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 23:14:18,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:18,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:18,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:14:18,875 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1311406618, now seen corresponding path program 1 times [2020-10-26 23:14:18,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:18,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789962301] [2020-10-26 23:14:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:18,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:19,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:20,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:20,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 23:14:20,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:14:20,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1994 [2020-10-26 23:14:20,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:14:20,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:14:20,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:14:20,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:21,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:21,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:21,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:21,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:21,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:14:21,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:21,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:21,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:21,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:14:21,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:21,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:21,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:21,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:14:21,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:21,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-26 23:14:21,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:21,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:21,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:14:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:14:21,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:14:21,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789962301] [2020-10-26 23:14:21,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:14:21,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:14:21,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008726708] [2020-10-26 23:14:21,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:14:21,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:14:21,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:14:21,620 INFO L87 Difference]: Start difference. First operand 3696 states and 5278 transitions. Second operand 7 states. [2020-10-26 23:14:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:14:50,666 INFO L93 Difference]: Finished difference Result 11022 states and 15927 transitions. [2020-10-26 23:14:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:14:50,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-26 23:14:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:14:50,706 INFO L225 Difference]: With dead ends: 11022 [2020-10-26 23:14:50,706 INFO L226 Difference]: Without dead ends: 7332 [2020-10-26 23:14:50,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:14:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2020-10-26 23:14:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 7155. [2020-10-26 23:14:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7155 states. [2020-10-26 23:14:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 9238 transitions. [2020-10-26 23:14:50,953 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 9238 transitions. Word has length 163 [2020-10-26 23:14:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:14:50,955 INFO L481 AbstractCegarLoop]: Abstraction has 7155 states and 9238 transitions. [2020-10-26 23:14:50,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:14:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 9238 transitions. [2020-10-26 23:14:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 23:14:50,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:14:50,964 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:14:50,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:14:50,969 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:14:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:14:50,971 INFO L82 PathProgramCache]: Analyzing trace with hash -847006833, now seen corresponding path program 1 times [2020-10-26 23:14:50,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:14:50,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295714546] [2020-10-26 23:14:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:14:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:51,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:51,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:51,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 23:14:51,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:51,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-26 23:14:51,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:14:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:14:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 23:14:51,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:51,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:14:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:51,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:51,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:51,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:14:51,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:51,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:14:51,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:14:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:51,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:14:51,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:51,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:14:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:14:51,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:14:51,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:14:51,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:14:51,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:14:51,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-26 23:14:51,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:14:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:14:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:14:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:14:51,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:14:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:14:51,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295714546] [2020-10-26 23:14:51,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:14:51,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:14:51,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713456916] [2020-10-26 23:14:51,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:14:51,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:14:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:14:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:14:51,957 INFO L87 Difference]: Start difference. First operand 7155 states and 9238 transitions. Second operand 5 states. [2020-10-26 23:15:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:19,343 INFO L93 Difference]: Finished difference Result 14515 states and 20123 transitions. [2020-10-26 23:15:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:15:19,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-10-26 23:15:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:19,394 INFO L225 Difference]: With dead ends: 14515 [2020-10-26 23:15:19,394 INFO L226 Difference]: Without dead ends: 10655 [2020-10-26 23:15:19,406 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 [2020-10-26 23:15:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10655 states. [2020-10-26 23:15:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10655 to 10629. [2020-10-26 23:15:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10629 states. [2020-10-26 23:15:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 13330 transitions. [2020-10-26 23:15:19,684 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 13330 transitions. Word has length 187 [2020-10-26 23:15:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:19,686 INFO L481 AbstractCegarLoop]: Abstraction has 10629 states and 13330 transitions. [2020-10-26 23:15:19,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:15:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 13330 transitions. [2020-10-26 23:15:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-26 23:15:19,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:19,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:15:19,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:15:19,695 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:19,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1251695922, now seen corresponding path program 1 times [2020-10-26 23:15:19,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:19,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864045217] [2020-10-26 23:15:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:21,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:24,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:24,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 23:15:24,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:15:24,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4557 [2020-10-26 23:15:24,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:15:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:15:24,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:24,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:24,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:24,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:24,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:24,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:24,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:15:24,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:24,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:24,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:24,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:24,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:24,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:24,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:24,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:24,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:15:24,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:24,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 23:15:24,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:24,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:15:24,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:24,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:15:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:24,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:24,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:24,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:15:24,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:24,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 23:15:24,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:15:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-26 23:15:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:15:24,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:15:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 100 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:15:25,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864045217] [2020-10-26 23:15:25,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:15:25,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:15:25,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415087805] [2020-10-26 23:15:25,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:15:25,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:25,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:15:25,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:15:25,176 INFO L87 Difference]: Start difference. First operand 10629 states and 13330 transitions. Second operand 7 states. [2020-10-26 23:15:25,346 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:15:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:49,570 INFO L93 Difference]: Finished difference Result 20743 states and 26295 transitions. [2020-10-26 23:15:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:15:49,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-26 23:15:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:49,607 INFO L225 Difference]: With dead ends: 20743 [2020-10-26 23:15:49,607 INFO L226 Difference]: Without dead ends: 10923 [2020-10-26 23:15:49,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:15:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2020-10-26 23:15:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 10795. [2020-10-26 23:15:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10795 states. [2020-10-26 23:15:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 13613 transitions. [2020-10-26 23:15:49,892 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 13613 transitions. Word has length 256 [2020-10-26 23:15:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:49,893 INFO L481 AbstractCegarLoop]: Abstraction has 10795 states and 13613 transitions. [2020-10-26 23:15:49,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:15:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 13613 transitions. [2020-10-26 23:15:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-26 23:15:49,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:49,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:15:49,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:15:49,900 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1698827945, now seen corresponding path program 1 times [2020-10-26 23:15:49,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:49,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180613287] [2020-10-26 23:15:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:50,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:50,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:51,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:51,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-26 23:15:51,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:15:51,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-26 23:15:51,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:15:51,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:15:51,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:51,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:51,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:51,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:51,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:51,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:51,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:15:51,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:15:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:15:51,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:51,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:51,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:51,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:51,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:15:51,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:51,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 23:15:51,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:15:51,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:15:51,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:15:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:51,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:51,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:51,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:15:51,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:51,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-26 23:15:51,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:15:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:15:52,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180613287] [2020-10-26 23:15:52,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:15:52,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:15:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461298586] [2020-10-26 23:15:52,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:15:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:15:52,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:15:52,112 INFO L87 Difference]: Start difference. First operand 10795 states and 13613 transitions. Second operand 7 states. [2020-10-26 23:16:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:16:28,470 INFO L93 Difference]: Finished difference Result 30812 states and 40969 transitions. [2020-10-26 23:16:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:16:28,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 263 [2020-10-26 23:16:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:16:28,546 INFO L225 Difference]: With dead ends: 30812 [2020-10-26 23:16:28,546 INFO L226 Difference]: Without dead ends: 20826 [2020-10-26 23:16:28,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:16:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20826 states. [2020-10-26 23:16:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20826 to 20405. [2020-10-26 23:16:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20405 states. [2020-10-26 23:16:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20405 states to 20405 states and 25194 transitions. [2020-10-26 23:16:29,077 INFO L78 Accepts]: Start accepts. Automaton has 20405 states and 25194 transitions. Word has length 263 [2020-10-26 23:16:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:16:29,079 INFO L481 AbstractCegarLoop]: Abstraction has 20405 states and 25194 transitions. [2020-10-26 23:16:29,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:16:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20405 states and 25194 transitions. [2020-10-26 23:16:29,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 23:16:29,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:29,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:16:29,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:16:29,086 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1438079013, now seen corresponding path program 1 times [2020-10-26 23:16:29,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:29,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398721508] [2020-10-26 23:16:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:29,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:29,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:29,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-26 23:16:29,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:29,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-26 23:16:29,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:16:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 232 [2020-10-26 23:16:29,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 23:16:29,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:30,059 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:16:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:30,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:30,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:30,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:30,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:30,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:16:30,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:30,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:16:30,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:30,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:16:30,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:30,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:16:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:30,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:30,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:30,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-26 23:16:30,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:30,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-26 23:16:30,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:30,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:30,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:30,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-26 23:16:30,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:16:30,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398721508] [2020-10-26 23:16:30,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:16:30,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:16:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997740617] [2020-10-26 23:16:30,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:16:30,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:16:30,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:16:30,683 INFO L87 Difference]: Start difference. First operand 20405 states and 25194 transitions. Second operand 5 states. [2020-10-26 23:16:32,025 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:17:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:04,222 INFO L93 Difference]: Finished difference Result 41981 states and 54395 transitions. [2020-10-26 23:17:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:17:04,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2020-10-26 23:17:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:04,339 INFO L225 Difference]: With dead ends: 41981 [2020-10-26 23:17:04,339 INFO L226 Difference]: Without dead ends: 27319 [2020-10-26 23:17:04,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:17:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27319 states. [2020-10-26 23:17:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27319 to 27215. [2020-10-26 23:17:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27215 states. [2020-10-26 23:17:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27215 states to 27215 states and 33076 transitions. [2020-10-26 23:17:05,049 INFO L78 Accepts]: Start accepts. Automaton has 27215 states and 33076 transitions. Word has length 280 [2020-10-26 23:17:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:05,050 INFO L481 AbstractCegarLoop]: Abstraction has 27215 states and 33076 transitions. [2020-10-26 23:17:05,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:17:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 27215 states and 33076 transitions. [2020-10-26 23:17:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-26 23:17:05,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:05,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:17:05,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:17:05,058 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash 133500709, now seen corresponding path program 1 times [2020-10-26 23:17:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:05,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673186844] [2020-10-26 23:17:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:05,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking...