/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/array-fpi/s5lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:19:00,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:19:00,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:19:00,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:19:00,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:19:00,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:19:00,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:19:00,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:19:00,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:19:00,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:19:00,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:19:00,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:19:00,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:19:00,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:19:00,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:19:00,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:19:00,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:19:00,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:19:00,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:19:00,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:19:00,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:19:00,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:19:00,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:19:00,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:19:00,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:19:00,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:19:00,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:19:00,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:19:00,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:19:00,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:19:00,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:19:00,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:19:00,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:19:00,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:19:00,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:19:00,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:19:00,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:19:00,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:19:00,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:19:00,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:19:00,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:19:00,740 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 [2020-10-28 09:19:00,791 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:19:00,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:19:00,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:19:00,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:19:00,796 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:19:00,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:19:00,796 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:19:00,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:19:00,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:19:00,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:19:00,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:19:00,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:19:00,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:19:00,799 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:19:00,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:19:00,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:19:00,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:19:00,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:19:00,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:19:00,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:19:00,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:19:00,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:19:00,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:19:00,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:19:00,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:19:00,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:19:00,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:19:00,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:19:00,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:19:00,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:19:01,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:19:01,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:19:01,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:19:01,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:19:01,256 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:19:01,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s5lif.c [2020-10-28 09:19:01,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d347edb20/861322e07da34ab08ccbe6807cbd5e73/FLAGc7e858459 [2020-10-28 09:19:01,981 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:19:01,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s5lif.c [2020-10-28 09:19:01,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d347edb20/861322e07da34ab08ccbe6807cbd5e73/FLAGc7e858459 [2020-10-28 09:19:02,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d347edb20/861322e07da34ab08ccbe6807cbd5e73 [2020-10-28 09:19:02,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:19:02,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:19:02,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:02,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:19:02,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:19:02,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28051c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02, skipping insertion in model container [2020-10-28 09:19:02,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:19:02,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:19:02,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:02,526 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:19:02,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:02,568 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:19:02,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02 WrapperNode [2020-10-28 09:19:02,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:02,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:19:02,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:19:02,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:19:02,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (1/1) ... [2020-10-28 09:19:02,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:19:02,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:19:02,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:19:02,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:19:02,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (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 [2020-10-28 09:19:02,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:19:02,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:19:02,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:19:02,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:19:02,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:19:02,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:19:02,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:19:02,704 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:19:02,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:19:02,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:19:02,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:19:02,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:19:02,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:19:02,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:19:02,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:19:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:19:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:19:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:19:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:19:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:19:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:19:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:19:03,278 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:19:03,279 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:19:03,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:03 BoogieIcfgContainer [2020-10-28 09:19:03,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:19:03,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:19:03,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:19:03,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:19:03,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:19:02" (1/3) ... [2020-10-28 09:19:03,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f401094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:03, skipping insertion in model container [2020-10-28 09:19:03,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:02" (2/3) ... [2020-10-28 09:19:03,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f401094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:03, skipping insertion in model container [2020-10-28 09:19:03,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:03" (3/3) ... [2020-10-28 09:19:03,293 INFO L111 eAbstractionObserver]: Analyzing ICFG s5lif.c [2020-10-28 09:19:03,329 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:19:03,334 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:19:03,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:19:03,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:19:03,395 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:19:03,396 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:19:03,396 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:19:03,396 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:19:03,396 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:19:03,396 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:19:03,396 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:19:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-28 09:19:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:19:03,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:03,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:03,430 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-28 09:19:03,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:03,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903284957] [2020-10-28 09:19:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:04,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:19:04,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:19:04,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-28 09:19:04,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:04,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:04,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:19:04,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:04,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:19:04,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:04,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:04,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:04,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:04,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 09:19:04,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:04,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:04,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:04,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:04,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:04,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:04,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:04,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:04,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:19:04,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:04,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:04,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:04,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:19:04,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:04,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:19:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:04,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903284957] [2020-10-28 09:19:04,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:04,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:19:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377865156] [2020-10-28 09:19:04,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:19:04,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:04,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:19:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:19:04,681 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-28 09:19:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:04,825 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-28 09:19:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:19:04,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-28 09:19:04,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:04,835 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:19:04,835 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:19:04,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:19:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:19:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:19:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:19:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 09:19:04,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-28 09:19:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:04,883 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 09:19:04,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:19:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 09:19:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:19:04,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:04,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:04,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:19:04,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-28 09:19:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:04,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222946742] [2020-10-28 09:19:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:04,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:05,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:19:05,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:19:05,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-28 09:19:05,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:05,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:05,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:19:05,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:19:05,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:19:05,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:05,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:05,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:05,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:05,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:05,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:19:05,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:05,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:05,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:05,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:05,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:05,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:05,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:19:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:19:05,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:05,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222946742] [2020-10-28 09:19:05,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:05,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:19:05,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976736598] [2020-10-28 09:19:05,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:19:05,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:19:05,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:19:05,422 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-28 09:19:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:05,657 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-28 09:19:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:19:05,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 09:19:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:05,659 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:19:05,659 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 09:19:05,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:19:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 09:19:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 09:19:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:19:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 09:19:05,670 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-28 09:19:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:05,670 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 09:19:05,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:19:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 09:19:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:19:05,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:05,672 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] [2020-10-28 09:19:05,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:19:05,672 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-28 09:19:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:05,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658012290] [2020-10-28 09:19:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:08,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:19:08,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:19:08,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3012 [2020-10-28 09:19:08,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:08,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:08,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:19:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:19:08,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:09,022 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2020-10-28 09:19:09,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:09,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:09,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:09,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:09,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:09,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:19:09,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:09,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:09,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:09,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:09,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:09,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:09,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:09,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:09,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:09,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:09,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:09,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:09,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658012290] [2020-10-28 09:19:09,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:09,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:19:09,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676936721] [2020-10-28 09:19:09,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:19:09,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:09,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:19:09,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:19:09,463 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-10-28 09:19:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:10,193 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-28 09:19:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:19:10,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-28 09:19:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:10,196 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:19:10,196 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:19:10,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:19:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:19:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-28 09:19:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:19:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 09:19:10,207 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2020-10-28 09:19:10,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:10,209 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 09:19:10,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:19:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 09:19:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:19:10,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:10,211 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] [2020-10-28 09:19:10,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:19:10,211 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:10,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-28 09:19:10,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:10,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839695820] [2020-10-28 09:19:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:10,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:11,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:11,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:19:11,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:19:11,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-10-28 09:19:11,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:11,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:19:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:19:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:19:11,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:11,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:11,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:11,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:11,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:11,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:19:11,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:11,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:11,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:11,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:11,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:11,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:11,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:11,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:11,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:11,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:11,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:11,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:11,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:11,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:19:11,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839695820] [2020-10-28 09:19:11,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:11,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:19:11,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138170602] [2020-10-28 09:19:11,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:19:11,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:19:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:19:11,752 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-10-28 09:19:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:11,999 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-28 09:19:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:19:11,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 09:19:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:12,001 INFO L225 Difference]: With dead ends: 52 [2020-10-28 09:19:12,001 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 09:19:12,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:19:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 09:19:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 09:19:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:19:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 09:19:12,010 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 31 [2020-10-28 09:19:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:12,010 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 09:19:12,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:19:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 09:19:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:19:12,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:12,011 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:19:12,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:19:12,012 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:12,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-28 09:19:12,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:12,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011936369] [2020-10-28 09:19:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:12,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:12,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:19:12,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:12,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-28 09:19:12,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:12,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:12,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:12,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:19:12,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:12,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:12,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:12,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:12,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:12,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:12,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:12,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:12,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:12,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:12,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:12,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:12,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:12,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:12,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:12,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:12,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:12,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:19:12,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011936369] [2020-10-28 09:19:12,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:12,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:19:12,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732919992] [2020-10-28 09:19:12,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:19:12,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:19:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:12,801 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-28 09:19:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:13,074 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-28 09:19:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:19:13,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 09:19:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:13,076 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:19:13,076 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:19:13,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:19:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:19:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-10-28 09:19:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:19:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-28 09:19:13,086 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2020-10-28 09:19:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:13,086 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-28 09:19:13,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:19:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-28 09:19:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:19:13,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:13,087 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:19:13,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:19:13,088 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:13,088 INFO L82 PathProgramCache]: Analyzing trace with hash 820807280, now seen corresponding path program 3 times [2020-10-28 09:19:13,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:13,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28167918] [2020-10-28 09:19:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:13,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:16,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:19:16,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:19:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3707 [2020-10-28 09:19:16,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:16,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:19:16,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:16,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:16,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:16,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:16,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:16,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:16,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:16,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:16,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:16,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:16,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:16,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:16,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:16,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:16,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:16,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:16,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:16,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:16,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:19:16,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28167918] [2020-10-28 09:19:16,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:16,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:19:16,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995736811] [2020-10-28 09:19:16,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:19:16,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:16,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:19:16,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:16,926 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-28 09:19:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:17,195 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-28 09:19:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:19:17,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:19:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:17,197 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:19:17,197 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:19:17,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:19:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:19:17,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-28 09:19:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:19:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-28 09:19:17,205 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-10-28 09:19:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:17,206 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-28 09:19:17,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:19:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-28 09:19:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:19:17,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:17,207 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] [2020-10-28 09:19:17,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:19:17,207 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:17,208 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 4 times [2020-10-28 09:19:17,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:17,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577427552] [2020-10-28 09:19:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:18,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:18,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:22,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:19:22,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:19:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:19:22,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:22,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:19:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:19:22,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:22,616 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-28 09:19:23,214 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-28 09:19:23,372 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-28 09:19:23,670 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-28 09:19:23,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:23,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:23,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:23,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:23,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:23,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:23,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:23,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:23,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:23,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:23,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:23,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:23,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:23,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577427552] [2020-10-28 09:19:23,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:23,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:19:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380277307] [2020-10-28 09:19:23,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:19:23,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:19:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:19:23,922 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 20 states. [2020-10-28 09:19:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:24,899 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-28 09:19:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:19:24,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-28 09:19:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:24,901 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:19:24,901 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:19:24,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:19:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:19:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-28 09:19:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:19:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-28 09:19:24,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-28 09:19:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:24,913 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-28 09:19:24,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:19:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-28 09:19:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:19:24,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:24,914 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:19:24,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:19:24,914 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:24,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 1 times [2020-10-28 09:19:24,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:24,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783336415] [2020-10-28 09:19:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:24,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:28,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:19:28,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:19:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3281 [2020-10-28 09:19:28,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:28,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:19:28,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:19:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:19:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:28,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:28,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:28,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:28,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:28,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:28,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:28,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:28,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:28,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:28,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:28,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:28,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:28,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:28,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:28,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:28,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:28,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:28,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:28,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:28,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:28,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:19:28,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783336415] [2020-10-28 09:19:28,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:28,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:19:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594568142] [2020-10-28 09:19:28,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:19:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:19:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:19:28,465 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-10-28 09:19:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:29,257 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-28 09:19:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:19:29,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 09:19:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:29,259 INFO L225 Difference]: With dead ends: 76 [2020-10-28 09:19:29,259 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:19:29,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:19:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:19:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2020-10-28 09:19:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:19:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-28 09:19:29,271 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 38 [2020-10-28 09:19:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:29,271 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-28 09:19:29,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:19:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-28 09:19:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:19:29,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:29,272 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:19:29,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:19:29,273 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 2 times [2020-10-28 09:19:29,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:29,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909711907] [2020-10-28 09:19:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:29,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:30,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:30,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:32,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:32,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:19:32,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:19:32,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-28 09:19:32,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:32,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:32,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:32,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:32,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:19:32,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:32,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:32,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:32,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:32,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:32,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:32,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:32,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:32,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:32,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:32,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:32,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:32,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:32,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:32,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:32,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:32,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:32,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:32,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:19:32,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909711907] [2020-10-28 09:19:32,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:32,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:19:32,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068284366] [2020-10-28 09:19:32,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:19:32,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:32,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:19:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:19:32,434 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 7 states. [2020-10-28 09:19:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:32,553 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-28 09:19:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:19:32,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-28 09:19:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:32,554 INFO L225 Difference]: With dead ends: 76 [2020-10-28 09:19:32,554 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 09:19:32,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 09:19:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 09:19:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:19:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-28 09:19:32,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-28 09:19:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:32,576 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-28 09:19:32,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:19:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-28 09:19:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:19:32,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:32,578 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:19:32,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:19:32,578 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:32,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:32,579 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 5 times [2020-10-28 09:19:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:32,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038438687] [2020-10-28 09:19:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:32,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:33,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:33,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:19:33,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:33,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-28 09:19:33,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:33,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:33,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:19:33,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:33,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:19:33,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:33,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:33,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:33,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:33,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:33,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:33,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:33,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:33,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:33,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:33,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:33,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:33,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:33,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:33,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:33,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:33,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:33,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:33,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:33,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:19:33,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038438687] [2020-10-28 09:19:33,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:33,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:19:33,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616986108] [2020-10-28 09:19:33,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:19:33,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:19:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:19:33,635 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 10 states. [2020-10-28 09:19:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:33,928 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-28 09:19:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:19:33,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 09:19:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:33,929 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:19:33,929 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:19:33,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:19:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:19:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-28 09:19:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:19:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-28 09:19:33,941 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2020-10-28 09:19:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:33,941 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-28 09:19:33,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:19:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-28 09:19:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:19:33,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:33,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-28 09:19:33,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:19:33,942 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 6 times [2020-10-28 09:19:33,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:33,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858321578] [2020-10-28 09:19:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:35,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:35,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:35,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:36,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:37,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:37,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:39,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:39,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:19:39,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-28 09:19:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 09:19:39,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:39,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:39,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:19:39,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:39,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:19:39,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:39,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:39,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:39,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:39,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:39,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:39,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:39,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:39,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:39,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:39,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:39,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:39,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:39,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:39,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:39,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:39,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:39,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:39,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:39,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:19:39,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858321578] [2020-10-28 09:19:39,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:39,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:19:39,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360300626] [2020-10-28 09:19:39,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:19:39,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:19:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:19:39,135 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 10 states. [2020-10-28 09:19:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:39,461 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-28 09:19:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:19:39,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-28 09:19:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:39,463 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:19:39,463 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:19:39,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:19:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:19:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-28 09:19:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:19:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 09:19:39,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2020-10-28 09:19:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:39,473 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 09:19:39,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:19:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 09:19:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:39,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:39,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:39,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:19:39,475 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:39,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 7 times [2020-10-28 09:19:39,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:39,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321417680] [2020-10-28 09:19:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:39,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:42,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:42,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:44,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:44,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:44,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:44,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:44,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:19:44,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:19:44,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:44,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:19:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:19:44,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:45,152 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-28 09:19:45,298 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-28 09:19:45,472 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-28 09:19:45,633 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-28 09:19:46,353 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-28 09:19:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:47,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:47,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:47,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:47,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:19:47,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:47,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:47,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:47,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:47,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:47,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:47,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:47,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:47,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:47,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:47,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:47,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321417680] [2020-10-28 09:19:47,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:47,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:19:47,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791027221] [2020-10-28 09:19:47,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:19:47,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:47,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:19:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:19:47,210 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 27 states. [2020-10-28 09:19:47,374 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2020-10-28 09:19:47,886 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 37 [2020-10-28 09:19:48,084 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 39 [2020-10-28 09:19:48,295 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-28 09:19:48,813 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-28 09:19:48,984 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-28 09:19:49,357 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-28 09:19:49,536 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 09:19:49,742 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2020-10-28 09:19:49,948 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 09:19:50,116 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-28 09:19:50,303 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 09:19:50,735 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-28 09:19:50,938 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 09:19:51,253 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 59 [2020-10-28 09:19:51,697 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2020-10-28 09:19:51,899 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2020-10-28 09:19:52,162 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-28 09:19:52,587 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2020-10-28 09:19:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:53,228 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-28 09:19:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:19:53,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-28 09:19:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:53,230 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:19:53,230 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 09:19:53,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=435, Invalid=2757, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:19:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 09:19:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-28 09:19:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 09:19:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-28 09:19:53,247 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 45 [2020-10-28 09:19:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:53,248 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-28 09:19:53,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:19:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-28 09:19:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:53,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:53,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:53,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:19:53,250 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 3 times [2020-10-28 09:19:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:53,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240753917] [2020-10-28 09:19:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:58,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:19:58,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:19:58,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:19:58,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:58,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:19:58,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:58,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:58,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:58,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:58,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:58,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:19:58,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240753917] [2020-10-28 09:19:58,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:58,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:19:58,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828881446] [2020-10-28 09:19:58,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:19:58,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:58,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:19:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:19:58,679 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 17 states. [2020-10-28 09:19:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:59,576 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-10-28 09:19:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:19:59,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-28 09:19:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:59,578 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:19:59,578 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:19:59,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:19:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:19:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-10-28 09:19:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:19:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-28 09:19:59,588 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 45 [2020-10-28 09:19:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:59,589 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-28 09:19:59,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:19:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-28 09:19:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:59,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:59,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:59,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:19:59,590 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:59,591 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 4 times [2020-10-28 09:19:59,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:59,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2529499] [2020-10-28 09:19:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:20:04,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:20:04,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:20:04,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:20:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:20:04,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:05,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:05,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:05,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:05,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:05,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:05,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:05,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:05,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:05,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:20:05,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2529499] [2020-10-28 09:20:05,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:05,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:20:05,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87896342] [2020-10-28 09:20:05,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:20:05,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:05,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:20:05,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:20:05,122 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 15 states. [2020-10-28 09:20:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:05,939 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2020-10-28 09:20:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:20:05,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-28 09:20:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:05,942 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:20:05,942 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 09:20:05,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:20:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 09:20:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-28 09:20:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 09:20:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-28 09:20:05,963 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 45 [2020-10-28 09:20:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:05,964 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-28 09:20:05,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:20:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-28 09:20:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:20:05,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:05,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:05,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:20:05,966 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 157796207, now seen corresponding path program 5 times [2020-10-28 09:20:05,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:05,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941017027] [2020-10-28 09:20:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:20:10,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:20:10,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:20:10,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:20:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:20:10,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:11,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:11,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:11,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:11,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:11,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:11,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:11,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:11,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:11,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:11,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:11,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:11,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:11,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:11,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:11,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:11,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:11,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:11,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:11,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:11,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:20:11,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941017027] [2020-10-28 09:20:11,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:11,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:20:11,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308547166] [2020-10-28 09:20:11,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:20:11,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:20:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:11,141 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 12 states. [2020-10-28 09:20:11,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:11,550 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2020-10-28 09:20:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:20:11,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-28 09:20:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:11,551 INFO L225 Difference]: With dead ends: 137 [2020-10-28 09:20:11,551 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 09:20:11,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 09:20:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-28 09:20:11,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:20:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-10-28 09:20:11,564 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 47 [2020-10-28 09:20:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:11,564 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-10-28 09:20:11,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:20:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-10-28 09:20:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:20:11,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:11,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:11,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:20:11,566 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1821362865, now seen corresponding path program 6 times [2020-10-28 09:20:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:11,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474396347] [2020-10-28 09:20:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:11,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:14,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:14,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:16,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:20:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:16,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:16,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:16,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:16,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:16,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:16,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:16,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:16,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:16,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:16,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:16,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:16,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:16,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:16,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:20:16,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474396347] [2020-10-28 09:20:16,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:16,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:20:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328408371] [2020-10-28 09:20:16,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:20:16,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:20:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:16,750 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 12 states. [2020-10-28 09:20:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:17,222 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-10-28 09:20:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:17,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-28 09:20:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:17,224 INFO L225 Difference]: With dead ends: 86 [2020-10-28 09:20:17,224 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:20:17,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:20:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-10-28 09:20:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 09:20:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-28 09:20:17,236 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 47 [2020-10-28 09:20:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:17,236 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-28 09:20:17,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:20:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-28 09:20:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:17,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:17,237 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:17,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:20:17,237 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 8 times [2020-10-28 09:20:17,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:17,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57334554] [2020-10-28 09:20:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:20:22,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:23,159 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-28 09:20:24,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:24,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:24,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:24,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:24,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:24,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:24,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:24,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:24,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:24,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:24,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:24,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:24,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:24,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:24,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57334554] [2020-10-28 09:20:24,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:24,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:20:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143896665] [2020-10-28 09:20:24,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:20:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:20:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:20:24,942 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 32 states. [2020-10-28 09:20:27,377 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-28 09:20:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:28,380 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-28 09:20:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:20:28,381 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2020-10-28 09:20:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:28,382 INFO L225 Difference]: With dead ends: 82 [2020-10-28 09:20:28,382 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 09:20:28,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=181, Invalid=2681, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:20:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 09:20:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2020-10-28 09:20:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:20:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-28 09:20:28,397 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 52 [2020-10-28 09:20:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:28,397 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-28 09:20:28,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:20:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-28 09:20:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:28,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:28,398 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:28,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:20:28,398 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 7 times [2020-10-28 09:20:28,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:28,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963685863] [2020-10-28 09:20:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:28,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:33,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:33,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:33,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:33,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:20:33,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:20:33,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:33,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:33,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:20:33,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:33,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:33,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:33,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:33,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:33,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:33,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:33,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:33,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:33,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:33,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:33,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:33,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:33,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:33,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:33,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:33,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:33,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:33,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:33,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:33,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:33,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:33,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:33,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:33,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:33,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:34,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963685863] [2020-10-28 09:20:34,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:34,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:20:34,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850420768] [2020-10-28 09:20:34,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:20:34,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:34,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:20:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:34,019 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 21 states. [2020-10-28 09:20:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:35,253 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2020-10-28 09:20:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:20:35,254 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-28 09:20:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:35,255 INFO L225 Difference]: With dead ends: 137 [2020-10-28 09:20:35,255 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:20:35,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:20:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:20:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 83. [2020-10-28 09:20:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:20:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-28 09:20:35,270 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 52 [2020-10-28 09:20:35,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:35,270 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-28 09:20:35,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:20:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-28 09:20:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:35,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:35,271 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:35,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:20:35,271 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 8 times [2020-10-28 09:20:35,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:35,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101730522] [2020-10-28 09:20:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:35,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:36,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:37,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:37,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:37,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:20:40,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:40,721 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-28 09:20:41,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:41,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:41,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:41,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:41,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:41,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:41,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:41,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:41,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:41,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:41,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:41,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:41,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:41,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:41,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:41,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:41,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:41,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:41,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:41,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:41,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:41,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:20:41,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101730522] [2020-10-28 09:20:41,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:41,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:20:41,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848835349] [2020-10-28 09:20:41,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:20:41,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:20:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:41,152 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 18 states. [2020-10-28 09:20:41,628 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-28 09:20:41,992 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-28 09:20:42,537 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 09:20:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:43,182 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2020-10-28 09:20:43,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:20:43,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-28 09:20:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:43,191 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:20:43,191 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 09:20:43,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:20:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 09:20:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-10-28 09:20:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:20:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-28 09:20:43,212 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 52 [2020-10-28 09:20:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:43,212 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-28 09:20:43,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:20:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-28 09:20:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:43,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:43,219 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:43,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:20:43,219 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 9 times [2020-10-28 09:20:43,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:43,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362278826] [2020-10-28 09:20:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:45,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:47,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:48,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:48,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:20:48,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:20:48,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:48,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:48,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:20:48,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:20:48,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:20:48,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:48,485 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-28 09:20:48,723 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-28 09:20:49,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:49,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:49,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:49,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:49,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:49,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:49,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:49,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:49,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:49,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:49,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:49,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:49,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:49,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:49,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 09:20:49,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362278826] [2020-10-28 09:20:49,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:49,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:20:49,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268789858] [2020-10-28 09:20:49,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:20:49,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:49,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:20:49,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:49,049 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 17 states. [2020-10-28 09:20:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:50,079 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2020-10-28 09:20:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:20:50,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-28 09:20:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:50,081 INFO L225 Difference]: With dead ends: 119 [2020-10-28 09:20:50,081 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:20:50,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:20:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:20:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-10-28 09:20:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:20:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-28 09:20:50,101 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 52 [2020-10-28 09:20:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:50,101 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-28 09:20:50,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:20:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-28 09:20:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:20:50,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:50,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:50,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:20:50,103 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 9 times [2020-10-28 09:20:50,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:50,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997950177] [2020-10-28 09:20:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:50,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:50,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2744 [2020-10-28 09:20:52,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:52,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:52,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:20:52,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:52,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:52,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:53,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:53,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:53,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:53,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:53,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:53,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:53,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:53,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:53,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:53,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:53,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:53,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:53,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:53,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:53,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:53,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:53,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:20:53,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997950177] [2020-10-28 09:20:53,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:53,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:20:53,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908955028] [2020-10-28 09:20:53,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:20:53,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:53,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:20:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:53,044 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 14 states. [2020-10-28 09:20:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:53,529 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-28 09:20:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:53,530 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-28 09:20:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:53,531 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:20:53,531 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 09:20:53,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 09:20:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-28 09:20:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:20:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-28 09:20:53,543 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 54 [2020-10-28 09:20:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:53,543 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-28 09:20:53,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:20:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-28 09:20:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:53,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:53,544 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:53,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:20:53,544 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 10 times [2020-10-28 09:20:53,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:53,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869291720] [2020-10-28 09:20:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:53,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:55,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:58,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:58,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:20:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:20:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:58,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:20:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:20:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:59,243 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2020-10-28 09:20:59,410 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-28 09:20:59,552 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-28 09:20:59,841 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-28 09:21:00,289 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-28 09:21:00,510 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-28 09:21:00,753 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-28 09:21:02,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:02,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:02,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:02,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:02,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:02,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:02,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:02,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:02,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:02,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869291720] [2020-10-28 09:21:02,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:02,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:21:02,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149793937] [2020-10-28 09:21:02,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:21:02,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:02,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:21:02,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:21:02,599 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 37 states. [2020-10-28 09:21:04,241 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-28 09:21:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:05,685 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-28 09:21:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:21:05,688 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 59 [2020-10-28 09:21:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:05,689 INFO L225 Difference]: With dead ends: 91 [2020-10-28 09:21:05,689 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:21:05,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:21:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:21:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-10-28 09:21:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:21:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2020-10-28 09:21:05,711 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 59 [2020-10-28 09:21:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:05,714 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2020-10-28 09:21:05,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:21:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2020-10-28 09:21:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:05,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:05,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:05,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:21:05,716 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1786718545, now seen corresponding path program 10 times [2020-10-28 09:21:05,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:05,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116460180] [2020-10-28 09:21:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:05,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:08,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:08,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:08,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:10,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:10,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:21:10,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:21:10,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:10,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:10,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:21:10,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:21:10,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:21:10,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:11,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:11,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:11,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:11,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:11,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:11,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:21:11,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:11,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:11,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:11,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:11,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:11,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:11,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:11,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:11,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:11,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:11,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:11,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:11,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:11,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:11,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:21:11,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116460180] [2020-10-28 09:21:11,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:11,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:21:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72123247] [2020-10-28 09:21:11,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:21:11,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:21:11,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:21:11,364 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 19 states. [2020-10-28 09:21:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:12,548 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-28 09:21:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:21:12,549 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-28 09:21:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:12,551 INFO L225 Difference]: With dead ends: 105 [2020-10-28 09:21:12,551 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 09:21:12,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:21:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 09:21:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2020-10-28 09:21:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:21:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-28 09:21:12,565 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 59 [2020-10-28 09:21:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:12,565 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-28 09:21:12,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:21:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-28 09:21:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:12,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:12,566 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:12,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:21:12,566 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 11 times [2020-10-28 09:21:12,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:12,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129335839] [2020-10-28 09:21:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:12,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:13,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:21:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:18,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:18,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:18,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:18,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:18,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:18,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:18,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:18,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:18,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:18,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:18,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:18,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:18,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:18,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:21:18,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129335839] [2020-10-28 09:21:18,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:18,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:21:18,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325386503] [2020-10-28 09:21:18,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:21:18,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:18,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:21:18,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:21:18,581 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 20 states. [2020-10-28 09:21:19,088 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-28 09:21:19,955 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 09:21:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:20,581 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-10-28 09:21:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:21:20,582 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-28 09:21:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:20,584 INFO L225 Difference]: With dead ends: 122 [2020-10-28 09:21:20,584 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 09:21:20,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:21:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 09:21:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2020-10-28 09:21:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:21:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-10-28 09:21:20,599 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 59 [2020-10-28 09:21:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:20,599 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-10-28 09:21:20,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:21:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-10-28 09:21:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:20,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:20,600 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:20,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:21:20,600 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:20,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 12 times [2020-10-28 09:21:20,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:20,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057859009] [2020-10-28 09:21:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:20,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:20,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:21,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:24,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:21:25,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:21:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:26,305 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-28 09:21:26,439 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-10-28 09:21:26,609 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-28 09:21:26,792 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-28 09:21:27,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:27,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:27,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:27,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:27,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:27,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:27,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:27,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:27,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:27,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:27,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:27,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:27,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:27,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:27,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:27,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:27,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:27,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:27,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:27,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:27,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:21:27,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057859009] [2020-10-28 09:21:27,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:27,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:21:27,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783618199] [2020-10-28 09:21:27,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:21:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:21:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:21:27,212 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 21 states. [2020-10-28 09:21:28,742 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-28 09:21:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:28,958 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2020-10-28 09:21:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:21:28,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-28 09:21:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:28,961 INFO L225 Difference]: With dead ends: 147 [2020-10-28 09:21:28,961 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 09:21:28,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:21:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 09:21:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2020-10-28 09:21:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 09:21:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-10-28 09:21:28,981 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 59 [2020-10-28 09:21:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:28,981 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-10-28 09:21:28,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:21:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-10-28 09:21:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:28,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:28,982 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:28,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:21:28,982 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:28,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 13 times [2020-10-28 09:21:28,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:28,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902171340] [2020-10-28 09:21:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:29,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:33,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:33,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:34,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:34,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:21:34,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 09:21:34,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:34,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:34,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:21:34,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:34,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:21:34,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:34,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:34,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:34,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:34,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:34,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:34,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:34,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:34,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:34,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:34,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:34,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:34,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:34,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:34,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:34,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:34,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:34,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:34,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 09:21:34,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902171340] [2020-10-28 09:21:34,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:34,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:21:34,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668650587] [2020-10-28 09:21:34,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:21:34,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:21:34,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:21:34,180 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 9 states. [2020-10-28 09:21:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:34,528 INFO L93 Difference]: Finished difference Result 150 states and 175 transitions. [2020-10-28 09:21:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:21:34,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 09:21:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:34,530 INFO L225 Difference]: With dead ends: 150 [2020-10-28 09:21:34,530 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 09:21:34,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:21:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 09:21:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-28 09:21:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:21:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-28 09:21:34,547 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 59 [2020-10-28 09:21:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:34,548 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-28 09:21:34,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:21:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-28 09:21:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:21:34,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:34,549 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:34,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:21:34,549 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:34,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 11 times [2020-10-28 09:21:34,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:34,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756023727] [2020-10-28 09:21:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4325 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:21:38,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:39,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:39,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:39,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:39,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:39,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:21:39,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:39,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:39,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:39,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:39,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:39,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:39,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:39,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:39,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:21:39,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756023727] [2020-10-28 09:21:39,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:39,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:21:39,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887074256] [2020-10-28 09:21:39,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:21:39,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:39,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:21:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:21:39,115 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 16 states. [2020-10-28 09:21:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:39,726 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2020-10-28 09:21:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:21:39,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-28 09:21:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:39,728 INFO L225 Difference]: With dead ends: 187 [2020-10-28 09:21:39,728 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:21:39,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:21:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:21:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2020-10-28 09:21:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:21:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-10-28 09:21:39,750 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 61 [2020-10-28 09:21:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:39,750 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-10-28 09:21:39,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:21:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-10-28 09:21:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:21:39,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:39,751 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:39,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:21:39,751 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:39,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1206194957, now seen corresponding path program 14 times [2020-10-28 09:21:39,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:39,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913143873] [2020-10-28 09:21:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:39,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:44,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:44,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 09:21:44,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:44,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:44,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:44,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:44,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:44,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:44,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:44,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:44,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:44,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:44,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:44,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:44,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:44,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:44,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:44,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:44,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:21:44,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913143873] [2020-10-28 09:21:44,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:44,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:21:44,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861803272] [2020-10-28 09:21:44,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:21:44,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:44,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:21:44,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:21:44,994 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 16 states. [2020-10-28 09:21:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:45,821 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-10-28 09:21:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:21:45,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-28 09:21:45,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:45,823 INFO L225 Difference]: With dead ends: 114 [2020-10-28 09:21:45,823 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:21:45,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:21:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:21:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2020-10-28 09:21:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:21:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-28 09:21:45,837 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 61 [2020-10-28 09:21:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:45,838 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-28 09:21:45,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:21:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-28 09:21:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:21:45,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:45,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:45,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:21:45,839 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 12 times [2020-10-28 09:21:45,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:45,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669036301] [2020-10-28 09:21:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:21:50,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:51,419 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-28 09:21:51,698 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-28 09:21:51,893 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-28 09:21:52,032 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-28 09:21:52,223 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-28 09:21:52,448 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-28 09:21:52,617 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-28 09:21:52,850 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-28 09:21:53,120 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-28 09:21:53,320 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-28 09:21:53,551 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-28 09:21:53,811 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-10-28 09:21:54,004 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-28 09:21:54,206 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-28 09:21:55,444 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-28 09:21:56,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:56,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:56,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:56,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:56,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 78 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 09:21:56,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669036301] [2020-10-28 09:21:56,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:56,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:21:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10147687] [2020-10-28 09:21:56,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:21:56,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:56,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:21:56,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:21:56,847 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 41 states. [2020-10-28 09:21:57,670 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-28 09:21:58,097 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-28 09:21:58,433 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 09:21:58,779 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 27 [2020-10-28 09:21:59,561 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-28 09:21:59,810 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-28 09:22:00,112 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-28 09:22:00,410 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-28 09:22:00,673 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-28 09:22:00,938 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-28 09:22:01,822 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-28 09:22:02,037 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-28 09:22:02,378 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-10-28 09:22:02,593 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-28 09:22:02,797 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 09:22:03,161 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2020-10-28 09:22:03,527 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-10-28 09:22:03,999 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2020-10-28 09:22:04,573 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-28 09:22:04,863 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-28 09:22:05,162 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-28 09:22:05,633 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-28 09:22:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:06,173 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-10-28 09:22:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 09:22:06,174 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2020-10-28 09:22:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:06,175 INFO L225 Difference]: With dead ends: 107 [2020-10-28 09:22:06,175 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:22:06,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1003, Invalid=5639, Unknown=0, NotChecked=0, Total=6642 [2020-10-28 09:22:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:22:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-10-28 09:22:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:22:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-28 09:22:06,191 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 66 [2020-10-28 09:22:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:06,192 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-28 09:22:06,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:22:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-28 09:22:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:22:06,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:06,192 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:06,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:22:06,193 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 68883168, now seen corresponding path program 15 times [2020-10-28 09:22:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:06,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2809953] [2020-10-28 09:22:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:06,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:06,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:07,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:07,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:07,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:09,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:09,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:09,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:09,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:09,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:09,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:11,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:22:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:12,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:12,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:12,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:12,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:12,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:12,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:12,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:12,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 09:22:12,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2809953] [2020-10-28 09:22:12,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:12,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:22:12,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378557114] [2020-10-28 09:22:12,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:22:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:22:12,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:22:12,391 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 24 states. [2020-10-28 09:22:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:14,592 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-10-28 09:22:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:22:14,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-10-28 09:22:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:14,595 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:22:14,595 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:22:14,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:22:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:22:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-10-28 09:22:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:22:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-28 09:22:14,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 66 [2020-10-28 09:22:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:14,618 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-28 09:22:14,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:22:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-28 09:22:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:22:14,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:14,619 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:14,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:22:14,619 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1936361116, now seen corresponding path program 16 times [2020-10-28 09:22:14,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:14,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917567444] [2020-10-28 09:22:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:14,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:15,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:15,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:15,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:19,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:22:19,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:22:19,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:22:19,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:19,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:19,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:22:19,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:22:19,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:22:19,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:20,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:20,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:20,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:20,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:20,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:20,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:20,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:20,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:20,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:20,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:20,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:20,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:20,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:20,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:20,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:20,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:20,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:20,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:20,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:20,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:20,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:22:20,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917567444] [2020-10-28 09:22:20,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:20,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:22:20,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616192324] [2020-10-28 09:22:20,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:22:20,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:20,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:22:20,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:22:20,917 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 24 states. [2020-10-28 09:22:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:22,938 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-28 09:22:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:22:22,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-10-28 09:22:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:22,940 INFO L225 Difference]: With dead ends: 122 [2020-10-28 09:22:22,940 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 09:22:22,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:22:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 09:22:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-10-28 09:22:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:22:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-28 09:22:22,964 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 66 [2020-10-28 09:22:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:22,964 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-28 09:22:22,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:22:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-28 09:22:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:22:22,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:22,966 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:22,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:22:22,966 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1034442400, now seen corresponding path program 17 times [2020-10-28 09:22:22,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:22,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347854814] [2020-10-28 09:22:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:23,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:23,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:23,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:23,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:23,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:27,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:27,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:22:28,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:22:28,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:22:28,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:28,294 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-28 09:22:28,473 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-28 09:22:29,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:29,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:29,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:29,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:29,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:29,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:22:29,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:29,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:29,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:29,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:29,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:29,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:29,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:29,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:29,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:29,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:29,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:29,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:29,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:29,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 57 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:22:29,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347854814] [2020-10-28 09:22:29,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:29,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:22:29,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782765452] [2020-10-28 09:22:29,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:22:29,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:22:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:22:29,617 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 26 states. [2020-10-28 09:22:30,985 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2020-10-28 09:22:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:32,051 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2020-10-28 09:22:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:22:32,052 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-10-28 09:22:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:32,054 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:22:32,054 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 09:22:32,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 09:22:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 09:22:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2020-10-28 09:22:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 09:22:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2020-10-28 09:22:32,079 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 66 [2020-10-28 09:22:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:32,079 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2020-10-28 09:22:32,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:22:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2020-10-28 09:22:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:22:32,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:32,080 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:32,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:22:32,081 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2145886180, now seen corresponding path program 18 times [2020-10-28 09:22:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:32,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476519111] [2020-10-28 09:22:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:33,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:33,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:33,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:35,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:35,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:35,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:22:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:22:37,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:37,675 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-28 09:22:38,083 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2020-10-28 09:22:38,386 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-10-28 09:22:38,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:38,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:38,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:38,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:38,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:38,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:38,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:38,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:38,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:38,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:38,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:38,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:38,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:38,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:38,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 09:22:38,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476519111] [2020-10-28 09:22:38,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:38,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:22:38,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108029033] [2020-10-28 09:22:38,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:22:38,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:22:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:22:38,847 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand 21 states. [2020-10-28 09:22:39,878 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-28 09:22:40,420 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-28 09:22:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:40,556 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2020-10-28 09:22:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:22:40,557 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-28 09:22:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:40,558 INFO L225 Difference]: With dead ends: 149 [2020-10-28 09:22:40,558 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:22:40,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:22:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:22:40,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-28 09:22:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 09:22:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-28 09:22:40,585 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 66 [2020-10-28 09:22:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:40,585 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-28 09:22:40,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:22:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-28 09:22:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:22:40,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:40,586 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:40,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:22:40,586 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 456758415, now seen corresponding path program 13 times [2020-10-28 09:22:40,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:40,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043739660] [2020-10-28 09:22:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:41,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:41,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:41,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:43,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:44,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:44,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:45,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:22:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:46,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:46,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:46,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:46,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:46,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:46,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:46,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:46,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:46,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:46,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:46,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:46,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:46,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:46,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:46,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:46,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:46,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 26 proven. 80 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:22:46,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043739660] [2020-10-28 09:22:46,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:46,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:22:46,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305733956] [2020-10-28 09:22:46,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:22:46,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:22:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:22:46,292 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 25 states.