/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/Problem03_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:51:48,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:51:48,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:51:48,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:51:48,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:51:48,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:51:48,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:51:48,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:51:48,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:51:48,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:51:48,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:51:48,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:51:48,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:51:48,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:51:48,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:51:48,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:51:48,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:51:48,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:51:48,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:51:48,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:51:48,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:51:48,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:51:48,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:51:48,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:51:48,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:51:48,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:51:48,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:51:48,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:51:48,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:51:48,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:51:48,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:51:48,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:51:48,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:51:48,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:51:48,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:51:48,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:51:48,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:51:48,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:51:48,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:51:48,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:51:48,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:51:48,676 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 20:51:48,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:51:48,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:51:48,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:51:48,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:51:48,734 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:51:48,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:51:48,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:51:48,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:51:48,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:51:48,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:51:48,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:51:48,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:51:48,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:51:48,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:51:48,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:51:48,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:51:48,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:51:48,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:51:48,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:51:48,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:51:48,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:51:48,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:51:48,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:51:48,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:51:48,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:51:48,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:51:48,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:51:48,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:51:48,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:51:48,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:51:49,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:51:49,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:51:49,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:51:49,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:51:49,236 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:51:49,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49.c [2020-10-26 20:51:49,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39c48f092/893030dc700645238edbdc984b744610/FLAG0b6f64458 [2020-10-26 20:51:50,157 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:51:50,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label49.c [2020-10-26 20:51:50,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39c48f092/893030dc700645238edbdc984b744610/FLAG0b6f64458 [2020-10-26 20:51:50,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39c48f092/893030dc700645238edbdc984b744610 [2020-10-26 20:51:50,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:51:50,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:51:50,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:51:50,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:51:50,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:51:50,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:51:50" (1/1) ... [2020-10-26 20:51:50,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c644f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:50, skipping insertion in model container [2020-10-26 20:51:50,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:51:50" (1/1) ... [2020-10-26 20:51:50,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:51:50,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:51:51,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:51:51,231 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:51:51,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:51:51,598 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:51:51,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51 WrapperNode [2020-10-26 20:51:51,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:51:51,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:51:51,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:51:51,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:51:51,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (1/1) ... [2020-10-26 20:51:51,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (1/1) ... [2020-10-26 20:51:51,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (1/1) ... [2020-10-26 20:51:51,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (1/1) ... [2020-10-26 20:51:51,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (1/1) ... [2020-10-26 20:51:51,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (1/1) ... [2020-10-26 20:51:51,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (1/1) ... [2020-10-26 20:51:51,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:51:51,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:51:51,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:51:51,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:51:51,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (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 20:51:51,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:51:51,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:51:51,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:51:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:51:51,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:51:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:51:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:51:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:51:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:51:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:51:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:51:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:51:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:51:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:51:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:51:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:51:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:51:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:51:51,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:51:54,694 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:51:54,694 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:51:54,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:51:54 BoogieIcfgContainer [2020-10-26 20:51:54,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:51:54,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:51:54,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:51:54,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:51:54,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:51:50" (1/3) ... [2020-10-26 20:51:54,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470a9445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:51:54, skipping insertion in model container [2020-10-26 20:51:54,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:51" (2/3) ... [2020-10-26 20:51:54,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470a9445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:51:54, skipping insertion in model container [2020-10-26 20:51:54,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:51:54" (3/3) ... [2020-10-26 20:51:54,707 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label49.c [2020-10-26 20:51:54,719 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:51:54,725 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:51:54,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:51:54,819 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:51:54,820 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:51:54,820 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:51:54,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:51:54,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:51:54,820 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:51:54,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:51:54,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:51:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:51:54,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-26 20:51:54,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:54,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:54,891 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:54,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1371048988, now seen corresponding path program 1 times [2020-10-26 20:51:54,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:54,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556412212] [2020-10-26 20:51:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:55,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:56,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:59,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:59,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-26 20:51:59,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:51:59,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4059 [2020-10-26 20:51:59,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:51:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:51:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:52:00,511 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-26 20:52:00,723 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 20:52:00,924 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 20:52:01,447 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-26 20:52:01,960 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-26 20:52:02,430 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-26 20:52:02,864 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-26 20:52:03,211 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-26 20:52:03,487 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-26 20:52:04,047 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:04,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:04,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:04,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:04,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:04,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:04,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:52:04,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:04,733 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 20:52:04,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556412212] [2020-10-26 20:52:04,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:52:04,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:52:04,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69609803] [2020-10-26 20:52:04,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:52:04,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:04,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:52:04,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:52:04,761 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:52:05,878 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:52:08,051 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 208 DAG size of output: 208 [2020-10-26 20:52:10,043 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 208 DAG size of output: 208 [2020-10-26 20:52:12,292 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 228 DAG size of output: 228 [2020-10-26 20:52:16,114 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 241 DAG size of output: 225 [2020-10-26 20:52:20,139 WARN L193 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 241 DAG size of output: 222 [2020-10-26 20:52:23,332 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 244 DAG size of output: 219 [2020-10-26 20:52:29,119 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 245 DAG size of output: 216 [2020-10-26 20:52:33,063 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 251 DAG size of output: 212 [2020-10-26 20:52:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:37,876 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:52:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:52:37,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 175 [2020-10-26 20:52:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:37,896 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:52:37,897 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:52:37,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:52:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:52:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:52:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:52:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:52:37,996 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 175 [2020-10-26 20:52:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:37,997 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:52:37,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:52:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:52:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 20:52:38,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:38,004 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:52:38,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:52:38,004 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1211560279, now seen corresponding path program 1 times [2020-10-26 20:52:38,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:38,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145167395] [2020-10-26 20:52:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:38,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-26 20:52:43,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:52:43,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4982 [2020-10-26 20:52:43,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:52:43,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:43,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-26 20:52:43,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 20:52:43,727 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:43,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:43,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:43,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:43,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:52:43,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:43,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:43,974 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:52:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:44,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:44,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:44,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:44,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:52:44,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:44,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:44,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:44,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:52:44,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:52:44,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145167395] [2020-10-26 20:52:44,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:44,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:52:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599119760] [2020-10-26 20:52:44,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:52:44,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:52:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:52:44,104 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:52:44,639 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:52:49,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:49,356 INFO L93 Difference]: Finished difference Result 850 states and 1330 transitions. [2020-10-26 20:52:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:52:49,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2020-10-26 20:52:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:49,380 INFO L225 Difference]: With dead ends: 850 [2020-10-26 20:52:49,381 INFO L226 Difference]: Without dead ends: 606 [2020-10-26 20:52:49,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:52:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-26 20:52:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 581. [2020-10-26 20:52:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-26 20:52:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 874 transitions. [2020-10-26 20:52:49,450 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 874 transitions. Word has length 186 [2020-10-26 20:52:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:49,451 INFO L481 AbstractCegarLoop]: Abstraction has 581 states and 874 transitions. [2020-10-26 20:52:49,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:52:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 874 transitions. [2020-10-26 20:52:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-26 20:52:49,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:49,462 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:52:49,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:52:49,462 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1461824660, now seen corresponding path program 1 times [2020-10-26 20:52:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:49,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510323376] [2020-10-26 20:52:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:49,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:50,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:53,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:53,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:54,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:54,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-26 20:52:54,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:52:54,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4693 [2020-10-26 20:52:54,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:52:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 20:52:54,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:54,826 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:54,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:54,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:54,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:54,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:54,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:54,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:52:54,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:54,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:54,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:54,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:54,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:55,134 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:52:55,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:55,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:55,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:55,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:55,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:52:55,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:55,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:55,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:55,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:52:55,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:52:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:55,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:55,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:52:55,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 20:52:55,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:52:55,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 20:52:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 20:52:55,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510323376] [2020-10-26 20:52:55,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:55,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:52:55,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377595873] [2020-10-26 20:52:55,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:52:55,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:55,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:52:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:52:55,474 INFO L87 Difference]: Start difference. First operand 581 states and 874 transitions. Second operand 6 states. [2020-10-26 20:52:55,970 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:53:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:01,003 INFO L93 Difference]: Finished difference Result 1499 states and 2398 transitions. [2020-10-26 20:53:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:53:01,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 196 [2020-10-26 20:53:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:01,015 INFO L225 Difference]: With dead ends: 1499 [2020-10-26 20:53:01,015 INFO L226 Difference]: Without dead ends: 1039 [2020-10-26 20:53:01,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-10-26 20:53:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1015. [2020-10-26 20:53:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-26 20:53:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1509 transitions. [2020-10-26 20:53:01,092 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1509 transitions. Word has length 196 [2020-10-26 20:53:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:01,092 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1509 transitions. [2020-10-26 20:53:01,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:53:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1509 transitions. [2020-10-26 20:53:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-26 20:53:01,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:01,097 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-26 20:53:01,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:53:01,098 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2113595605, now seen corresponding path program 1 times [2020-10-26 20:53:01,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:01,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932477785] [2020-10-26 20:53:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:01,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:01,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:01,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:02,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:02,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:03,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:05,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:05,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-26 20:53:05,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:53:05,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4635 [2020-10-26 20:53:05,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:05,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:05,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:05,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:53:05,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:06,249 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:06,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:06,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:06,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:06,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:06,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:53:06,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:06,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:06,502 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:06,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:06,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:06,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:06,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:06,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:06,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:53:06,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:06,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:06,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:53:06,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:06,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:06,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:06,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:06,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:06,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:53:06,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:06,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:53:06,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:53:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:53:06,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932477785] [2020-10-26 20:53:06,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:53:06,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 20:53:06,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199306123] [2020-10-26 20:53:06,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:53:06,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:06,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:53:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:53:06,631 INFO L87 Difference]: Start difference. First operand 1015 states and 1509 transitions. Second operand 5 states. [2020-10-26 20:53:07,093 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:09,689 INFO L93 Difference]: Finished difference Result 1912 states and 2896 transitions. [2020-10-26 20:53:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:53:09,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2020-10-26 20:53:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:09,700 INFO L225 Difference]: With dead ends: 1912 [2020-10-26 20:53:09,700 INFO L226 Difference]: Without dead ends: 1018 [2020-10-26 20:53:09,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:53:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-10-26 20:53:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 1014. [2020-10-26 20:53:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2020-10-26 20:53:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1507 transitions. [2020-10-26 20:53:09,747 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1507 transitions. Word has length 196 [2020-10-26 20:53:09,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:09,747 INFO L481 AbstractCegarLoop]: Abstraction has 1014 states and 1507 transitions. [2020-10-26 20:53:09,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:53:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1507 transitions. [2020-10-26 20:53:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-26 20:53:09,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:09,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:53:09,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:53:09,760 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash -974115684, now seen corresponding path program 1 times [2020-10-26 20:53:09,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:09,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206381265] [2020-10-26 20:53:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:09,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:10,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:13,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:13,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-26 20:53:13,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:13,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3859 [2020-10-26 20:53:13,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:13,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:13,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:13,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:53:13,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:14,179 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:14,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:14,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:14,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:14,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:14,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:14,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:53:14,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:14,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:14,397 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:14,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:14,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:14,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:14,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:53:14,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:14,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:14,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:14,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:14,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:14,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:14,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:53:14,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:14,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 20:53:14,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:53:14,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:53:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:53:14,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206381265] [2020-10-26 20:53:14,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:14,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:53:14,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333109819] [2020-10-26 20:53:14,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:14,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:14,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:14,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:14,777 INFO L87 Difference]: Start difference. First operand 1014 states and 1507 transitions. Second operand 7 states. [2020-10-26 20:53:15,305 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:53:16,124 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:53:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:20,815 INFO L93 Difference]: Finished difference Result 2596 states and 3973 transitions. [2020-10-26 20:53:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:53:20,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 200 [2020-10-26 20:53:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:20,830 INFO L225 Difference]: With dead ends: 2596 [2020-10-26 20:53:20,831 INFO L226 Difference]: Without dead ends: 1703 [2020-10-26 20:53:20,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:53:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-26 20:53:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1663. [2020-10-26 20:53:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-10-26 20:53:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2287 transitions. [2020-10-26 20:53:20,896 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2287 transitions. Word has length 200 [2020-10-26 20:53:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:20,896 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 2287 transitions. [2020-10-26 20:53:20,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2287 transitions. [2020-10-26 20:53:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 20:53:20,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:20,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:53:20,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:53:20,904 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:20,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1794098064, now seen corresponding path program 1 times [2020-10-26 20:53:20,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:20,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148808789] [2020-10-26 20:53:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:20,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:22,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:24,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:24,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 20:53:24,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:24,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3259 [2020-10-26 20:53:24,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:24,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:53:24,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:24,703 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:24,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:24,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:24,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:24,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:24,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:24,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:53:24,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:24,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:24,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:24,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:24,925 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:24,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:24,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:24,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:24,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:24,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:24,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:53:24,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:24,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:24,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:25,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:25,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:25,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:53:25,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:25,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:53:25,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:25,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:53:25,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:53:25,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148808789] [2020-10-26 20:53:25,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:25,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:25,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082882637] [2020-10-26 20:53:25,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:25,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:25,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:25,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:25,126 INFO L87 Difference]: Start difference. First operand 1663 states and 2287 transitions. Second operand 8 states. [2020-10-26 20:53:25,662 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:28,791 INFO L93 Difference]: Finished difference Result 3191 states and 4441 transitions. [2020-10-26 20:53:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:53:28,793 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 203 [2020-10-26 20:53:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:28,801 INFO L225 Difference]: With dead ends: 3191 [2020-10-26 20:53:28,802 INFO L226 Difference]: Without dead ends: 1649 [2020-10-26 20:53:28,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:53:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-10-26 20:53:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1637. [2020-10-26 20:53:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1637 states. [2020-10-26 20:53:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2188 transitions. [2020-10-26 20:53:28,858 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2188 transitions. Word has length 203 [2020-10-26 20:53:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:28,859 INFO L481 AbstractCegarLoop]: Abstraction has 1637 states and 2188 transitions. [2020-10-26 20:53:28,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2188 transitions. [2020-10-26 20:53:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 20:53:28,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:28,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:53:28,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:53:28,865 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1243132816, now seen corresponding path program 1 times [2020-10-26 20:53:28,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:28,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026912433] [2020-10-26 20:53:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:28,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:30,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:32,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:32,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 20:53:32,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:32,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3341 [2020-10-26 20:53:32,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:32,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:32,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:32,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:53:32,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:32,813 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:32,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:32,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:32,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:32,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:32,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:32,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:53:32,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:32,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:32,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:32,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:32,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:33,097 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:33,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:33,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:33,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:33,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:33,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:53:33,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:33,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 20:53:33,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:53:33,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:33,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:53:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:33,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:33,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:33,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:53:33,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:33,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:53:33,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:33,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:33,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:33,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:53:33,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:53:33,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026912433] [2020-10-26 20:53:33,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:33,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:53:33,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243508783] [2020-10-26 20:53:33,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:33,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:33,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:33,348 INFO L87 Difference]: Start difference. First operand 1637 states and 2188 transitions. Second operand 7 states. [2020-10-26 20:53:33,953 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:53:37,377 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:53:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:39,988 INFO L93 Difference]: Finished difference Result 3711 states and 5459 transitions. [2020-10-26 20:53:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:53:39,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 210 [2020-10-26 20:53:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:40,010 INFO L225 Difference]: With dead ends: 3711 [2020-10-26 20:53:40,010 INFO L226 Difference]: Without dead ends: 2822 [2020-10-26 20:53:40,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:53:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2020-10-26 20:53:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2759. [2020-10-26 20:53:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2759 states. [2020-10-26 20:53:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3802 transitions. [2020-10-26 20:53:40,112 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3802 transitions. Word has length 210 [2020-10-26 20:53:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:40,112 INFO L481 AbstractCegarLoop]: Abstraction has 2759 states and 3802 transitions. [2020-10-26 20:53:40,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3802 transitions. [2020-10-26 20:53:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 20:53:40,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:40,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:53:40,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:53:40,122 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:40,123 INFO L82 PathProgramCache]: Analyzing trace with hash 80050344, now seen corresponding path program 1 times [2020-10-26 20:53:40,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:40,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887067597] [2020-10-26 20:53:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:40,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:41,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:41,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:41,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 20:53:41,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-26 20:53:41,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:53:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 20:53:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:42,165 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:42,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:42,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:42,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:53:42,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:42,384 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:42,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:42,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:42,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:42,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:53:42,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:53:42,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:53:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:53:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:42,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:42,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:53:42,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:42,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 20:53:42,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:42,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:42,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:42,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 20:53:42,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:53:42,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887067597] [2020-10-26 20:53:42,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:42,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:42,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107234735] [2020-10-26 20:53:42,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:42,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:42,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:42,623 INFO L87 Difference]: Start difference. First operand 2759 states and 3802 transitions. Second operand 7 states. [2020-10-26 20:53:43,529 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:45,570 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:49,554 INFO L93 Difference]: Finished difference Result 6485 states and 10871 transitions. [2020-10-26 20:53:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:53:49,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-26 20:53:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:49,592 INFO L225 Difference]: With dead ends: 6485 [2020-10-26 20:53:49,593 INFO L226 Difference]: Without dead ends: 4683 [2020-10-26 20:53:49,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:53:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4683 states. [2020-10-26 20:53:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4683 to 4073. [2020-10-26 20:53:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4073 states. [2020-10-26 20:53:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 5437 transitions. [2020-10-26 20:53:49,793 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 5437 transitions. Word has length 219 [2020-10-26 20:53:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:49,793 INFO L481 AbstractCegarLoop]: Abstraction has 4073 states and 5437 transitions. [2020-10-26 20:53:49,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 5437 transitions. [2020-10-26 20:53:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-26 20:53:49,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:49,809 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:53:49,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:53:49,809 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1418775596, now seen corresponding path program 1 times [2020-10-26 20:53:49,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:49,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478515718] [2020-10-26 20:53:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:50,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:50,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:54,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:54,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-26 20:53:54,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-26 20:53:54,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:53:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:55,482 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:55,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:55,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:55,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:55,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:55,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:55,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:53:55,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:55,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:55,712 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:53:55,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:55,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:55,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:55,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:55,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:55,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:55,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:53:55,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:55,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-26 20:53:55,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:53:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:55,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:53:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:55,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:56,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:56,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:53:56,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:56,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:53:56,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:53:56,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:56,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:53:56,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-26 20:53:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:56,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:56,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:53:56,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:56,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:53:56,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:56,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:56,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:53:56,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:56,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:53:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-26 20:53:56,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478515718] [2020-10-26 20:53:56,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:56,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:56,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929985417] [2020-10-26 20:53:56,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:56,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:56,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:56,253 INFO L87 Difference]: Start difference. First operand 4073 states and 5437 transitions. Second operand 7 states. [2020-10-26 20:53:56,786 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:54:00,366 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:54:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:02,607 INFO L93 Difference]: Finished difference Result 10572 states and 14681 transitions. [2020-10-26 20:54:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:54:02,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 286 [2020-10-26 20:54:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:02,645 INFO L225 Difference]: With dead ends: 10572 [2020-10-26 20:54:02,645 INFO L226 Difference]: Without dead ends: 7458 [2020-10-26 20:54:02,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:54:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7458 states. [2020-10-26 20:54:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7458 to 7333. [2020-10-26 20:54:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7333 states. [2020-10-26 20:54:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7333 states to 7333 states and 9825 transitions. [2020-10-26 20:54:02,891 INFO L78 Accepts]: Start accepts. Automaton has 7333 states and 9825 transitions. Word has length 286 [2020-10-26 20:54:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:02,892 INFO L481 AbstractCegarLoop]: Abstraction has 7333 states and 9825 transitions. [2020-10-26 20:54:02,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 7333 states and 9825 transitions. [2020-10-26 20:54:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-26 20:54:02,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:02,921 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:02,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:54:02,922 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash 262982699, now seen corresponding path program 1 times [2020-10-26 20:54:02,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:02,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876401928] [2020-10-26 20:54:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:03,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:03,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:03,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:03,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:05,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:08,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:08,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-26 20:54:08,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:54:08,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 20:54:08,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:08,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:54:08,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:08,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:54:08,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:08,558 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:08,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:08,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:08,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:08,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:54:08,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:08,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:08,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:08,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:08,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:08,777 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:54:08,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:08,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:08,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:08,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:08,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:54:08,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:54:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:54:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:54:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:09,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:09,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:54:09,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:09,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 20:54:09,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:54:09,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:09,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:54:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:09,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:54:09,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:09,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 20:54:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:09,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:09,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:09,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:54:09,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:09,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:54:09,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-26 20:54:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:09,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:09,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-26 20:54:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:09,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:09,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:09,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 127 proven. 68 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-26 20:54:09,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876401928] [2020-10-26 20:54:09,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:09,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:54:09,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064405446] [2020-10-26 20:54:09,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:54:09,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:09,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:54:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:54:09,482 INFO L87 Difference]: Start difference. First operand 7333 states and 9825 transitions. Second operand 10 states. [2020-10-26 20:54:10,053 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:54:11,464 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 169 DAG size of output: 161 [2020-10-26 20:54:17,668 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 167 DAG size of output: 162 [2020-10-26 20:54:18,240 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:54:20,809 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:54:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:24,819 INFO L93 Difference]: Finished difference Result 23539 states and 32648 transitions. [2020-10-26 20:54:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 20:54:24,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 299 [2020-10-26 20:54:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:24,895 INFO L225 Difference]: With dead ends: 23539 [2020-10-26 20:54:24,895 INFO L226 Difference]: Without dead ends: 16327 [2020-10-26 20:54:24,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2020-10-26 20:54:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16327 states. [2020-10-26 20:54:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16327 to 15715. [2020-10-26 20:54:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15715 states. [2020-10-26 20:54:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15715 states to 15715 states and 21665 transitions. [2020-10-26 20:54:25,508 INFO L78 Accepts]: Start accepts. Automaton has 15715 states and 21665 transitions. Word has length 299 [2020-10-26 20:54:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:25,508 INFO L481 AbstractCegarLoop]: Abstraction has 15715 states and 21665 transitions. [2020-10-26 20:54:25,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:54:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 15715 states and 21665 transitions. [2020-10-26 20:54:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-26 20:54:25,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:25,557 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:25,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:54:25,558 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash -577327302, now seen corresponding path program 1 times [2020-10-26 20:54:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:25,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527838686] [2020-10-26 20:54:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:25,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:26,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:29,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:30,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:30,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:30,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-26 20:54:30,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:54:30,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 20:54:30,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:54:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:30,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 20:54:30,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:31,194 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:31,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:31,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:31,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:31,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:31,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:54:31,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:31,435 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:54:31,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:31,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:54:31,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:31,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:54:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:31,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:54:31,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:31,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:54:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:31,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:31,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:31,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 127 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:54:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527838686] [2020-10-26 20:54:32,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:32,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:32,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323077937] [2020-10-26 20:54:32,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:32,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:32,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:32,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:32,019 INFO L87 Difference]: Start difference. First operand 15715 states and 21665 transitions. Second operand 7 states. [2020-10-26 20:54:32,558 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:54:34,635 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:54:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:38,092 INFO L93 Difference]: Finished difference Result 33280 states and 46907 transitions. [2020-10-26 20:54:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:54:38,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 308 [2020-10-26 20:54:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:38,164 INFO L225 Difference]: With dead ends: 33280 [2020-10-26 20:54:38,164 INFO L226 Difference]: Without dead ends: 18944 [2020-10-26 20:54:38,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:54:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18944 states. [2020-10-26 20:54:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18944 to 18715. [2020-10-26 20:54:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18715 states. [2020-10-26 20:54:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18715 states to 18715 states and 25928 transitions. [2020-10-26 20:54:38,740 INFO L78 Accepts]: Start accepts. Automaton has 18715 states and 25928 transitions. Word has length 308 [2020-10-26 20:54:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:38,741 INFO L481 AbstractCegarLoop]: Abstraction has 18715 states and 25928 transitions. [2020-10-26 20:54:38,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 18715 states and 25928 transitions. [2020-10-26 20:54:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-26 20:54:38,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:38,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:38,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:54:38,802 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:38,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1599868173, now seen corresponding path program 1 times [2020-10-26 20:54:38,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:38,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969743164] [2020-10-26 20:54:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:39,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:43,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:43,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:43,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:43,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-26 20:54:43,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:54:43,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 20:54:43,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:43,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:54:43,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:43,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-26 20:54:43,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:44,516 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:44,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:44,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:44,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:44,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:44,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:44,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:54:44,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:44,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:44,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:44,753 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:54:44,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:44,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:44,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:44,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:44,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:44,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:54:44,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:44,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:54:44,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:44,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:54:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:44,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:45,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 20:54:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:45,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 20:54:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:45,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:45,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:45,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:54:45,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:54:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 130 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:54:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969743164] [2020-10-26 20:54:45,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:45,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997398201] [2020-10-26 20:54:45,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:45,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:45,296 INFO L87 Difference]: Start difference. First operand 18715 states and 25928 transitions. Second operand 7 states. [2020-10-26 20:54:45,801 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:54:48,794 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:54:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:51,477 INFO L93 Difference]: Finished difference Result 48619 states and 70360 transitions. [2020-10-26 20:54:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:54:51,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 309 [2020-10-26 20:54:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:51,609 INFO L225 Difference]: With dead ends: 48619 [2020-10-26 20:54:51,610 INFO L226 Difference]: Without dead ends: 31283 [2020-10-26 20:54:51,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:54:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31283 states. [2020-10-26 20:54:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31283 to 31032. [2020-10-26 20:54:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31032 states. [2020-10-26 20:54:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31032 states to 31032 states and 43551 transitions. [2020-10-26 20:54:52,542 INFO L78 Accepts]: Start accepts. Automaton has 31032 states and 43551 transitions. Word has length 309 [2020-10-26 20:54:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:52,543 INFO L481 AbstractCegarLoop]: Abstraction has 31032 states and 43551 transitions. [2020-10-26 20:54:52,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:54:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 31032 states and 43551 transitions. [2020-10-26 20:54:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-26 20:54:52,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:52,625 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-10-26 20:54:52,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:54:52,626 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1438615633, now seen corresponding path program 1 times [2020-10-26 20:54:52,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:52,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95339101] [2020-10-26 20:54:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:52,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:52,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:53,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 20:54:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,312 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:58,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:58,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,531 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:54:58,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:54:58,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:54:58,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:58,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:58,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:54:58,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:54:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:54:58,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-26 20:54:58,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:54:58,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:58,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:54:58,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 20:54:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:54:58,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:54:58,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:58,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:54:58,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:58,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 20:54:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:58,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:58,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:54:58,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 134 proven. 72 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-26 20:54:58,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95339101] [2020-10-26 20:54:58,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:58,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:54:58,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937271849] [2020-10-26 20:54:58,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:54:58,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:54:58,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:54:58,938 INFO L87 Difference]: Start difference. First operand 31032 states and 43551 transitions. Second operand 7 states. [2020-10-26 20:54:59,489 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:02,355 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:55:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:04,776 INFO L93 Difference]: Finished difference Result 70565 states and 105827 transitions. [2020-10-26 20:55:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:55:04,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 312 [2020-10-26 20:55:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:04,992 INFO L225 Difference]: With dead ends: 70565 [2020-10-26 20:55:04,993 INFO L226 Difference]: Without dead ends: 41121 [2020-10-26 20:55:05,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:55:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41121 states. [2020-10-26 20:55:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41121 to 40485. [2020-10-26 20:55:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40485 states. [2020-10-26 20:55:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40485 states to 40485 states and 55627 transitions. [2020-10-26 20:55:06,585 INFO L78 Accepts]: Start accepts. Automaton has 40485 states and 55627 transitions. Word has length 312 [2020-10-26 20:55:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:06,586 INFO L481 AbstractCegarLoop]: Abstraction has 40485 states and 55627 transitions. [2020-10-26 20:55:06,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:55:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 40485 states and 55627 transitions. [2020-10-26 20:55:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-26 20:55:06,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:06,644 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:06,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:55:06,644 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash -227765468, now seen corresponding path program 1 times [2020-10-26 20:55:06,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:06,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073872007] [2020-10-26 20:55:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:07,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:07,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:09,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:10,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:12,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 20:55:12,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:12,541 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:12,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:12,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:12,759 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:55:12,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:12,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:12,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:13,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:13,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:55:13,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:13,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-26 20:55:13,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:13,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:13,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:13,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:55:13,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:13,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:55:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:13,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:13,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:13,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:13,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:13,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:55:13,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:13,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 20:55:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:13,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:13,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:13,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:55:13,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:13,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:55:13,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:13,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:13,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:13,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:55:13,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:13,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-26 20:55:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:13,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:13,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:13,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:55:13,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:13,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:55:13,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:13,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:55:13,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:13,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:55:13,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-10-26 20:55:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:13,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:13,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:55:13,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 152 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 20:55:13,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073872007] [2020-10-26 20:55:13,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:13,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:55:13,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897322311] [2020-10-26 20:55:13,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:55:13,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:55:13,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:55:13,908 INFO L87 Difference]: Start difference. First operand 40485 states and 55627 transitions. Second operand 9 states. [2020-10-26 20:55:14,443 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:55:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:20,675 INFO L93 Difference]: Finished difference Result 114452 states and 166108 transitions. [2020-10-26 20:55:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:55:20,676 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2020-10-26 20:55:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:21,006 INFO L225 Difference]: With dead ends: 114452 [2020-10-26 20:55:21,006 INFO L226 Difference]: Without dead ends: 76188 [2020-10-26 20:55:21,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:55:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76188 states. [2020-10-26 20:55:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76188 to 75077. [2020-10-26 20:55:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75077 states. [2020-10-26 20:55:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75077 states to 75077 states and 104171 transitions. [2020-10-26 20:55:24,140 INFO L78 Accepts]: Start accepts. Automaton has 75077 states and 104171 transitions. Word has length 323 [2020-10-26 20:55:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:24,140 INFO L481 AbstractCegarLoop]: Abstraction has 75077 states and 104171 transitions. [2020-10-26 20:55:24,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:55:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 75077 states and 104171 transitions. [2020-10-26 20:55:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-26 20:55:24,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:24,217 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:55:24,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:55:24,217 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash 475776182, now seen corresponding path program 1 times [2020-10-26 20:55:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:24,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475180651] [2020-10-26 20:55:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY