/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=DEEPEST --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/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:08:46,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:08:46,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:08:46,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:08:46,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:08:46,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:08:46,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:08:46,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:08:46,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:08:46,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:08:46,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:08:46,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:08:46,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:08:46,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:08:46,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:08:46,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:08:46,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:08:46,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:08:46,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:08:46,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:08:46,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:08:46,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:08:46,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:08:46,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:08:46,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:08:46,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:08:46,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:08:46,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:08:46,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:08:46,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:08:46,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:08:46,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:08:46,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:08:46,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:08:46,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:08:46,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:08:46,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:08:46,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:08:46,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:08:46,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:08:46,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:08:46,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:08:46,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:08:46,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:08:46,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:08:46,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:08:46,923 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:08:46,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:08:46,924 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:08:46,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:08:46,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:08:46,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:08:46,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:08:46,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:08:46,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:08:46,926 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:08:46,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:08:46,926 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:08:46,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:08:46,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:08:46,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:08:46,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:08:46,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:08:46,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:08:46,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:08:46,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:08:46,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:08:46,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:08:46,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:08:46,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:08:46,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:08:46,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:08:47,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:08:47,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:08:47,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:08:47,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:08:47,363 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:08:47,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-10-27 20:08:47,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db22adb9/3b432c140f0f4b81878ac4882d280006/FLAG2270e6742 [2020-10-27 20:08:48,160 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:08:48,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-10-27 20:08:48,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db22adb9/3b432c140f0f4b81878ac4882d280006/FLAG2270e6742 [2020-10-27 20:08:48,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db22adb9/3b432c140f0f4b81878ac4882d280006 [2020-10-27 20:08:48,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:08:48,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:08:48,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:08:48,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:08:48,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:08:48,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b45425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48, skipping insertion in model container [2020-10-27 20:08:48,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:08:48,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:08:48,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:08:48,742 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:08:48,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:08:48,836 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:08:48,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48 WrapperNode [2020-10-27 20:08:48,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:08:48,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:08:48,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:08:48,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:08:48,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:08:48,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:08:48,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:08:48,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:08:48,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:08:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:08:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:08:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:08:49,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:08:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:08:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:08:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:08:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:08:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:08:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:08:49,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:08:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:08:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:08:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:08:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:08:49,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:08:49,627 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:08:49,627 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:08:49,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:08:49 BoogieIcfgContainer [2020-10-27 20:08:49,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:08:49,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:08:49,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:08:49,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:08:49,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:08:48" (1/3) ... [2020-10-27 20:08:49,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1443ddbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:08:49, skipping insertion in model container [2020-10-27 20:08:49,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (2/3) ... [2020-10-27 20:08:49,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1443ddbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:08:49, skipping insertion in model container [2020-10-27 20:08:49,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:08:49" (3/3) ... [2020-10-27 20:08:49,640 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-10-27 20:08:49,653 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:08:49,659 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:08:49,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:08:49,702 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:08:49,702 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:08:49,702 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:08:49,703 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:08:49,703 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:08:49,703 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:08:49,703 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:08:49,703 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:08:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-27 20:08:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:08:49,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:49,733 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] [2020-10-27 20:08:49,733 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2059309882, now seen corresponding path program 1 times [2020-10-27 20:08:49,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:49,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025795008] [2020-10-27 20:08:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:49,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:08:50,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 20:08:50,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:50,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:08:50,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:08:50,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:08:50,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:50,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:08:50,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:50,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:50,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:50,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025795008] [2020-10-27 20:08:50,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:50,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:50,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882151641] [2020-10-27 20:08:50,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:50,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:50,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:50,418 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2020-10-27 20:08:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:50,724 INFO L93 Difference]: Finished difference Result 98 states and 169 transitions. [2020-10-27 20:08:50,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:50,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:08:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:50,741 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:08:50,742 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:08:50,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:08:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-10-27 20:08:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:08:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 99 transitions. [2020-10-27 20:08:50,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 99 transitions. Word has length 23 [2020-10-27 20:08:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:50,804 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 99 transitions. [2020-10-27 20:08:50,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 99 transitions. [2020-10-27 20:08:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:08:50,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:50,806 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] [2020-10-27 20:08:50,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:08:50,806 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:50,807 INFO L82 PathProgramCache]: Analyzing trace with hash 955793736, now seen corresponding path program 1 times [2020-10-27 20:08:50,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:50,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903837068] [2020-10-27 20:08:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:08:51,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-27 20:08:51,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:08:51,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:51,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:08:51,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:51,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:51,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:08:51,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:51,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:51,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:51,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903837068] [2020-10-27 20:08:51,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:51,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:51,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593414486] [2020-10-27 20:08:51,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:51,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:51,131 INFO L87 Difference]: Start difference. First operand 56 states and 99 transitions. Second operand 4 states. [2020-10-27 20:08:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:51,324 INFO L93 Difference]: Finished difference Result 129 states and 235 transitions. [2020-10-27 20:08:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:51,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:08:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:51,327 INFO L225 Difference]: With dead ends: 129 [2020-10-27 20:08:51,327 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:08:51,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:08:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 20:08:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:08:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 139 transitions. [2020-10-27 20:08:51,342 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 139 transitions. Word has length 23 [2020-10-27 20:08:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:51,343 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 139 transitions. [2020-10-27 20:08:51,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 139 transitions. [2020-10-27 20:08:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:08:51,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:51,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:51,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:08:51,345 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash 592501448, now seen corresponding path program 1 times [2020-10-27 20:08:51,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:51,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362828710] [2020-10-27 20:08:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:51,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:51,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-27 20:08:51,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:51,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:08:51,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:51,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:08:51,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:51,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:51,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:08:51,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:51,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:51,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362828710] [2020-10-27 20:08:51,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:51,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:51,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961884433] [2020-10-27 20:08:51,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:51,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:51,599 INFO L87 Difference]: Start difference. First operand 78 states and 139 transitions. Second operand 4 states. [2020-10-27 20:08:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:51,817 INFO L93 Difference]: Finished difference Result 218 states and 400 transitions. [2020-10-27 20:08:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:51,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:08:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:51,820 INFO L225 Difference]: With dead ends: 218 [2020-10-27 20:08:51,820 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 20:08:51,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 20:08:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-27 20:08:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 20:08:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 262 transitions. [2020-10-27 20:08:51,839 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 262 transitions. Word has length 24 [2020-10-27 20:08:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:51,840 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 262 transitions. [2020-10-27 20:08:51,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 262 transitions. [2020-10-27 20:08:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:08:51,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:51,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:51,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:08:51,842 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:51,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1872365126, now seen corresponding path program 1 times [2020-10-27 20:08:51,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:51,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731455975] [2020-10-27 20:08:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:51,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:51,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 20:08:51,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:51,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:08:51,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:08:51,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:52,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:52,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:08:52,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:52,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:52,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731455975] [2020-10-27 20:08:52,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:52,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:52,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480785574] [2020-10-27 20:08:52,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:52,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:52,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:52,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:52,068 INFO L87 Difference]: Start difference. First operand 145 states and 262 transitions. Second operand 4 states. [2020-10-27 20:08:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:52,264 INFO L93 Difference]: Finished difference Result 189 states and 341 transitions. [2020-10-27 20:08:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:52,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:08:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:52,267 INFO L225 Difference]: With dead ends: 189 [2020-10-27 20:08:52,267 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 20:08:52,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 20:08:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 145. [2020-10-27 20:08:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 20:08:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 260 transitions. [2020-10-27 20:08:52,299 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 260 transitions. Word has length 24 [2020-10-27 20:08:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:52,300 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 260 transitions. [2020-10-27 20:08:52,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 260 transitions. [2020-10-27 20:08:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:08:52,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:52,305 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] [2020-10-27 20:08:52,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:08:52,306 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1194284625, now seen corresponding path program 1 times [2020-10-27 20:08:52,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:52,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318279664] [2020-10-27 20:08:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:08:52,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:52,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 20:08:52,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:52,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:08:52,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:08:52,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:52,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:52,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:52,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:52,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:52,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:52,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318279664] [2020-10-27 20:08:52,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:52,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:52,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069014731] [2020-10-27 20:08:52,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:52,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:52,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:52,532 INFO L87 Difference]: Start difference. First operand 145 states and 260 transitions. Second operand 4 states. [2020-10-27 20:08:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:52,691 INFO L93 Difference]: Finished difference Result 273 states and 495 transitions. [2020-10-27 20:08:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:52,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:08:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:52,694 INFO L225 Difference]: With dead ends: 273 [2020-10-27 20:08:52,694 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 20:08:52,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 20:08:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 197. [2020-10-27 20:08:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 20:08:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 352 transitions. [2020-10-27 20:08:52,709 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 352 transitions. Word has length 25 [2020-10-27 20:08:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:52,709 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 352 transitions. [2020-10-27 20:08:52,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 352 transitions. [2020-10-27 20:08:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:08:52,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:52,711 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] [2020-10-27 20:08:52,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:08:52,712 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash -85579053, now seen corresponding path program 1 times [2020-10-27 20:08:52,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:52,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334448358] [2020-10-27 20:08:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:08:52,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:52,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 20:08:52,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:08:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:52,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:52,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:52,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:52,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:52,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:52,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:52,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:52,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334448358] [2020-10-27 20:08:52,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:52,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:52,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762268032] [2020-10-27 20:08:52,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:52,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:52,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:52,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:52,907 INFO L87 Difference]: Start difference. First operand 197 states and 352 transitions. Second operand 4 states. [2020-10-27 20:08:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:53,119 INFO L93 Difference]: Finished difference Result 469 states and 847 transitions. [2020-10-27 20:08:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:53,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:08:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:53,122 INFO L225 Difference]: With dead ends: 469 [2020-10-27 20:08:53,123 INFO L226 Difference]: Without dead ends: 278 [2020-10-27 20:08:53,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-27 20:08:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2020-10-27 20:08:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 20:08:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 492 transitions. [2020-10-27 20:08:53,139 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 492 transitions. Word has length 25 [2020-10-27 20:08:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:53,140 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 492 transitions. [2020-10-27 20:08:53,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 492 transitions. [2020-10-27 20:08:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:08:53,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:53,141 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] [2020-10-27 20:08:53,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:08:53,142 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:53,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1625262797, now seen corresponding path program 1 times [2020-10-27 20:08:53,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:53,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747534223] [2020-10-27 20:08:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:53,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:53,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:08:53,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:53,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 20:08:53,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:53,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:53,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:08:53,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:08:53,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:53,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:53,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:53,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:53,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:08:53,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:53,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:53,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:53,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:53,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:53,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747534223] [2020-10-27 20:08:53,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:53,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:53,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893977497] [2020-10-27 20:08:53,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:53,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:53,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:53,479 INFO L87 Difference]: Start difference. First operand 277 states and 492 transitions. Second operand 4 states. [2020-10-27 20:08:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:53,672 INFO L93 Difference]: Finished difference Result 517 states and 927 transitions. [2020-10-27 20:08:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:53,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:08:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:53,677 INFO L225 Difference]: With dead ends: 517 [2020-10-27 20:08:53,677 INFO L226 Difference]: Without dead ends: 514 [2020-10-27 20:08:53,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-27 20:08:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 385. [2020-10-27 20:08:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-27 20:08:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 676 transitions. [2020-10-27 20:08:53,704 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 676 transitions. Word has length 26 [2020-10-27 20:08:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:53,706 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 676 transitions. [2020-10-27 20:08:53,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 676 transitions. [2020-10-27 20:08:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:08:53,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:53,716 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] [2020-10-27 20:08:53,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:08:53,716 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1389840821, now seen corresponding path program 1 times [2020-10-27 20:08:53,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:53,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483775873] [2020-10-27 20:08:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:53,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:53,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:08:53,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 20:08:53,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:08:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:54,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:54,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:54,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:54,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:54,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:08:54,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:54,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:54,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483775873] [2020-10-27 20:08:54,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:54,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:54,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380892927] [2020-10-27 20:08:54,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:54,042 INFO L87 Difference]: Start difference. First operand 385 states and 676 transitions. Second operand 4 states. [2020-10-27 20:08:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:54,236 INFO L93 Difference]: Finished difference Result 917 states and 1623 transitions. [2020-10-27 20:08:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:54,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:08:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:54,240 INFO L225 Difference]: With dead ends: 917 [2020-10-27 20:08:54,241 INFO L226 Difference]: Without dead ends: 538 [2020-10-27 20:08:54,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:54,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-10-27 20:08:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 537. [2020-10-27 20:08:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-27 20:08:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 936 transitions. [2020-10-27 20:08:54,264 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 936 transitions. Word has length 26 [2020-10-27 20:08:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:54,265 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 936 transitions. [2020-10-27 20:08:54,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 936 transitions. [2020-10-27 20:08:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:08:54,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:54,267 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] [2020-10-27 20:08:54,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:08:54,267 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1163090908, now seen corresponding path program 1 times [2020-10-27 20:08:54,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:54,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174925192] [2020-10-27 20:08:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:54,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:54,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:08:54,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:08:54,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 20:08:54,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:54,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:54,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:08:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:08:54,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:54,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:54,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:54,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:54,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:54,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:54,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:54,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174925192] [2020-10-27 20:08:54,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:54,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492221784] [2020-10-27 20:08:54,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:54,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:54,675 INFO L87 Difference]: Start difference. First operand 537 states and 936 transitions. Second operand 4 states. [2020-10-27 20:08:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:54,865 INFO L93 Difference]: Finished difference Result 989 states and 1739 transitions. [2020-10-27 20:08:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:54,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:08:54,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:54,872 INFO L225 Difference]: With dead ends: 989 [2020-10-27 20:08:54,872 INFO L226 Difference]: Without dead ends: 986 [2020-10-27 20:08:54,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-10-27 20:08:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 761. [2020-10-27 20:08:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2020-10-27 20:08:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1304 transitions. [2020-10-27 20:08:54,918 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1304 transitions. Word has length 27 [2020-10-27 20:08:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:54,919 INFO L481 AbstractCegarLoop]: Abstraction has 761 states and 1304 transitions. [2020-10-27 20:08:54,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1304 transitions. [2020-10-27 20:08:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:08:54,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:54,923 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] [2020-10-27 20:08:54,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:08:54,927 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash -116772770, now seen corresponding path program 1 times [2020-10-27 20:08:54,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:54,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860472418] [2020-10-27 20:08:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:54,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:55,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:08:55,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:08:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-27 20:08:55,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:08:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:55,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:55,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:55,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:55,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:55,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:55,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:55,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:55,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:55,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860472418] [2020-10-27 20:08:55,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:55,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:55,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182008037] [2020-10-27 20:08:55,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:55,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:55,373 INFO L87 Difference]: Start difference. First operand 761 states and 1304 transitions. Second operand 4 states. [2020-10-27 20:08:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:55,573 INFO L93 Difference]: Finished difference Result 1805 states and 3115 transitions. [2020-10-27 20:08:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:55,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:08:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:55,580 INFO L225 Difference]: With dead ends: 1805 [2020-10-27 20:08:55,580 INFO L226 Difference]: Without dead ends: 1050 [2020-10-27 20:08:55,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2020-10-27 20:08:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1049. [2020-10-27 20:08:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-10-27 20:08:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1784 transitions. [2020-10-27 20:08:55,623 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1784 transitions. Word has length 27 [2020-10-27 20:08:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:55,623 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1784 transitions. [2020-10-27 20:08:55,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1784 transitions. [2020-10-27 20:08:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:08:55,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:55,626 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] [2020-10-27 20:08:55,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:08:55,626 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:55,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1702720414, now seen corresponding path program 1 times [2020-10-27 20:08:55,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:55,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919218604] [2020-10-27 20:08:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:56,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:08:56,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:08:56,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-27 20:08:56,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:56,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:56,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:08:56,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:08:56,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:56,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:56,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:56,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:56,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:56,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:56,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919218604] [2020-10-27 20:08:56,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:56,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:56,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086292136] [2020-10-27 20:08:56,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:56,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:56,239 INFO L87 Difference]: Start difference. First operand 1049 states and 1784 transitions. Second operand 4 states. [2020-10-27 20:08:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:56,570 INFO L93 Difference]: Finished difference Result 1901 states and 3259 transitions. [2020-10-27 20:08:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:56,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:08:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:56,586 INFO L225 Difference]: With dead ends: 1901 [2020-10-27 20:08:56,586 INFO L226 Difference]: Without dead ends: 1898 [2020-10-27 20:08:56,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-10-27 20:08:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1513. [2020-10-27 20:08:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2020-10-27 20:08:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2520 transitions. [2020-10-27 20:08:56,664 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2520 transitions. Word has length 28 [2020-10-27 20:08:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:56,666 INFO L481 AbstractCegarLoop]: Abstraction has 1513 states and 2520 transitions. [2020-10-27 20:08:56,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2520 transitions. [2020-10-27 20:08:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:08:56,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:56,669 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] [2020-10-27 20:08:56,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:08:56,669 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:56,670 INFO L82 PathProgramCache]: Analyzing trace with hash 422856736, now seen corresponding path program 1 times [2020-10-27 20:08:56,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:56,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380303061] [2020-10-27 20:08:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:57,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:08:57,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:08:57,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-27 20:08:57,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:57,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:57,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:08:57,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:57,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:57,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:57,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:57,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:57,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:57,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:57,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:57,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:57,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:57,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:57,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380303061] [2020-10-27 20:08:57,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:57,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565238295] [2020-10-27 20:08:57,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:57,346 INFO L87 Difference]: Start difference. First operand 1513 states and 2520 transitions. Second operand 4 states. [2020-10-27 20:08:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:57,572 INFO L93 Difference]: Finished difference Result 3565 states and 5979 transitions. [2020-10-27 20:08:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:57,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:08:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:57,584 INFO L225 Difference]: With dead ends: 3565 [2020-10-27 20:08:57,584 INFO L226 Difference]: Without dead ends: 2058 [2020-10-27 20:08:57,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2020-10-27 20:08:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 2057. [2020-10-27 20:08:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2057 states. [2020-10-27 20:08:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3400 transitions. [2020-10-27 20:08:57,687 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3400 transitions. Word has length 28 [2020-10-27 20:08:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:57,687 INFO L481 AbstractCegarLoop]: Abstraction has 2057 states and 3400 transitions. [2020-10-27 20:08:57,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3400 transitions. [2020-10-27 20:08:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:08:57,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:57,691 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] [2020-10-27 20:08:57,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:08:57,692 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1251376487, now seen corresponding path program 1 times [2020-10-27 20:08:57,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:57,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63494397] [2020-10-27 20:08:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:57,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:08:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-10-27 20:08:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:08:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:08:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:58,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:58,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:58,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:08:58,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:58,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:58,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:08:58,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63494397] [2020-10-27 20:08:58,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:58,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:58,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356778955] [2020-10-27 20:08:58,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:58,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:58,862 INFO L87 Difference]: Start difference. First operand 2057 states and 3400 transitions. Second operand 4 states. [2020-10-27 20:08:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:59,127 INFO L93 Difference]: Finished difference Result 3661 states and 6091 transitions. [2020-10-27 20:08:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:59,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:08:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:59,146 INFO L225 Difference]: With dead ends: 3661 [2020-10-27 20:08:59,146 INFO L226 Difference]: Without dead ends: 3658 [2020-10-27 20:08:59,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:08:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2020-10-27 20:08:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3017. [2020-10-27 20:08:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2020-10-27 20:08:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4872 transitions. [2020-10-27 20:08:59,290 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4872 transitions. Word has length 29 [2020-10-27 20:08:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:59,291 INFO L481 AbstractCegarLoop]: Abstraction has 3017 states and 4872 transitions. [2020-10-27 20:08:59,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4872 transitions. [2020-10-27 20:08:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:08:59,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:59,296 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] [2020-10-27 20:08:59,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:08:59,297 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash -28487191, now seen corresponding path program 1 times [2020-10-27 20:08:59,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:59,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958592502] [2020-10-27 20:08:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:09:00,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:09:00,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-27 20:09:00,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:00,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:09:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:00,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:00,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:00,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:00,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:00,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:00,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:00,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:00,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:00,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:00,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958592502] [2020-10-27 20:09:00,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:00,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:00,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124950491] [2020-10-27 20:09:00,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:00,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:00,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:00,356 INFO L87 Difference]: Start difference. First operand 3017 states and 4872 transitions. Second operand 4 states. [2020-10-27 20:09:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:00,654 INFO L93 Difference]: Finished difference Result 7053 states and 11467 transitions. [2020-10-27 20:09:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:00,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:09:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:00,674 INFO L225 Difference]: With dead ends: 7053 [2020-10-27 20:09:00,674 INFO L226 Difference]: Without dead ends: 4042 [2020-10-27 20:09:00,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2020-10-27 20:09:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 4041. [2020-10-27 20:09:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4041 states. [2020-10-27 20:09:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4041 states to 4041 states and 6472 transitions. [2020-10-27 20:09:00,870 INFO L78 Accepts]: Start accepts. Automaton has 4041 states and 6472 transitions. Word has length 29 [2020-10-27 20:09:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:00,870 INFO L481 AbstractCegarLoop]: Abstraction has 4041 states and 6472 transitions. [2020-10-27 20:09:00,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4041 states and 6472 transitions. [2020-10-27 20:09:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:00,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:00,876 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] [2020-10-27 20:09:00,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:09:00,876 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 144627209, now seen corresponding path program 1 times [2020-10-27 20:09:00,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:00,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557171756] [2020-10-27 20:09:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:01,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:02,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:02,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:02,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:02,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1764 [2020-10-27 20:09:02,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:02,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:02,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:02,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:02,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:02,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:02,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:02,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:02,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:02,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:02,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:02,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:02,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:02,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:02,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:02,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557171756] [2020-10-27 20:09:02,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:02,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944584997] [2020-10-27 20:09:02,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:02,740 INFO L87 Difference]: Start difference. First operand 4041 states and 6472 transitions. Second operand 4 states. [2020-10-27 20:09:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:03,102 INFO L93 Difference]: Finished difference Result 7053 states and 11339 transitions. [2020-10-27 20:09:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:03,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:03,152 INFO L225 Difference]: With dead ends: 7053 [2020-10-27 20:09:03,152 INFO L226 Difference]: Without dead ends: 7050 [2020-10-27 20:09:03,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-10-27 20:09:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6025. [2020-10-27 20:09:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6025 states. [2020-10-27 20:09:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 9416 transitions. [2020-10-27 20:09:03,405 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 9416 transitions. Word has length 30 [2020-10-27 20:09:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:03,406 INFO L481 AbstractCegarLoop]: Abstraction has 6025 states and 9416 transitions. [2020-10-27 20:09:03,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 9416 transitions. [2020-10-27 20:09:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:03,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:03,415 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] [2020-10-27 20:09:03,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:09:03,415 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:03,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1135236469, now seen corresponding path program 1 times [2020-10-27 20:09:03,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:03,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838164519] [2020-10-27 20:09:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:03,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:05,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:05,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:05,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1630 [2020-10-27 20:09:05,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:05,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:05,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:05,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:05,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:05,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:05,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:05,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:05,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:05,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838164519] [2020-10-27 20:09:05,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:05,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129408503] [2020-10-27 20:09:05,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:05,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:05,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:05,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:05,125 INFO L87 Difference]: Start difference. First operand 6025 states and 9416 transitions. Second operand 4 states. [2020-10-27 20:09:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:05,471 INFO L93 Difference]: Finished difference Result 13965 states and 21963 transitions. [2020-10-27 20:09:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:05,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:05,495 INFO L225 Difference]: With dead ends: 13965 [2020-10-27 20:09:05,495 INFO L226 Difference]: Without dead ends: 7946 [2020-10-27 20:09:05,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2020-10-27 20:09:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 7945. [2020-10-27 20:09:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7945 states. [2020-10-27 20:09:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7945 states to 7945 states and 12296 transitions. [2020-10-27 20:09:05,837 INFO L78 Accepts]: Start accepts. Automaton has 7945 states and 12296 transitions. Word has length 30 [2020-10-27 20:09:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:05,838 INFO L481 AbstractCegarLoop]: Abstraction has 7945 states and 12296 transitions. [2020-10-27 20:09:05,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 7945 states and 12296 transitions. [2020-10-27 20:09:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:05,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:05,849 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] [2020-10-27 20:09:05,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:09:05,849 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash 195148530, now seen corresponding path program 1 times [2020-10-27 20:09:05,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:05,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183303796] [2020-10-27 20:09:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:09,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:09,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:09,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3435 [2020-10-27 20:09:09,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:09,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:09,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:09,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:09,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:09,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:09,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:09,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:09,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:09,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:09,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:09,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:09,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183303796] [2020-10-27 20:09:09,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:09,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:09,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938007601] [2020-10-27 20:09:09,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:09,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:09,352 INFO L87 Difference]: Start difference. First operand 7945 states and 12296 transitions. Second operand 4 states. [2020-10-27 20:09:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:09,793 INFO L93 Difference]: Finished difference Result 13581 states and 21003 transitions. [2020-10-27 20:09:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:09,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:09,825 INFO L225 Difference]: With dead ends: 13581 [2020-10-27 20:09:09,825 INFO L226 Difference]: Without dead ends: 13578 [2020-10-27 20:09:09,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13578 states. [2020-10-27 20:09:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13578 to 12041. [2020-10-27 20:09:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12041 states. [2020-10-27 20:09:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12041 states to 12041 states and 18184 transitions. [2020-10-27 20:09:10,281 INFO L78 Accepts]: Start accepts. Automaton has 12041 states and 18184 transitions. Word has length 31 [2020-10-27 20:09:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:10,282 INFO L481 AbstractCegarLoop]: Abstraction has 12041 states and 18184 transitions. [2020-10-27 20:09:10,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 12041 states and 18184 transitions. [2020-10-27 20:09:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:10,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:10,300 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] [2020-10-27 20:09:10,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:09:10,301 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:10,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1084715148, now seen corresponding path program 1 times [2020-10-27 20:09:10,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:10,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220184471] [2020-10-27 20:09:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:10,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:13,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:13,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:13,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:13,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3374 [2020-10-27 20:09:13,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:13,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:13,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:13,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:13,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:13,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:13,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:13,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:13,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:13,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:13,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:13,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:13,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220184471] [2020-10-27 20:09:13,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:13,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:13,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040717110] [2020-10-27 20:09:13,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:13,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:13,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:13,753 INFO L87 Difference]: Start difference. First operand 12041 states and 18184 transitions. Second operand 4 states. [2020-10-27 20:09:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:14,281 INFO L93 Difference]: Finished difference Result 27661 states and 41995 transitions. [2020-10-27 20:09:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:14,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:14,317 INFO L225 Difference]: With dead ends: 27661 [2020-10-27 20:09:14,317 INFO L226 Difference]: Without dead ends: 15626 [2020-10-27 20:09:14,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15626 states. [2020-10-27 20:09:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15626 to 15625. [2020-10-27 20:09:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15625 states. [2020-10-27 20:09:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15625 states to 15625 states and 23304 transitions. [2020-10-27 20:09:14,867 INFO L78 Accepts]: Start accepts. Automaton has 15625 states and 23304 transitions. Word has length 31 [2020-10-27 20:09:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:14,868 INFO L481 AbstractCegarLoop]: Abstraction has 15625 states and 23304 transitions. [2020-10-27 20:09:14,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 15625 states and 23304 transitions. [2020-10-27 20:09:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:09:14,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:14,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:14,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:09:14,887 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1761320052, now seen corresponding path program 1 times [2020-10-27 20:09:14,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:14,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677509940] [2020-10-27 20:09:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:14,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:19,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:19,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:09:19,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:19,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:09:19,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:09:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:19,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:19,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:19,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:19,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:19,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:19,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:19,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:19,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:19,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:19,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:19,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:19,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:19,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677509940] [2020-10-27 20:09:19,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:19,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:19,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769291425] [2020-10-27 20:09:19,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:19,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:19,956 INFO L87 Difference]: Start difference. First operand 15625 states and 23304 transitions. Second operand 4 states. [2020-10-27 20:09:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:20,658 INFO L93 Difference]: Finished difference Result 46349 states and 68875 transitions. [2020-10-27 20:09:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:20,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 20:09:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:20,730 INFO L225 Difference]: With dead ends: 46349 [2020-10-27 20:09:20,730 INFO L226 Difference]: Without dead ends: 30730 [2020-10-27 20:09:20,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30730 states. [2020-10-27 20:09:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30730 to 30729. [2020-10-27 20:09:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30729 states. [2020-10-27 20:09:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30729 states to 30729 states and 44552 transitions. [2020-10-27 20:09:21,833 INFO L78 Accepts]: Start accepts. Automaton has 30729 states and 44552 transitions. Word has length 32 [2020-10-27 20:09:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:21,834 INFO L481 AbstractCegarLoop]: Abstraction has 30729 states and 44552 transitions. [2020-10-27 20:09:21,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 30729 states and 44552 transitions. [2020-10-27 20:09:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:09:21,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:21,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:21,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:09:21,872 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1253783566, now seen corresponding path program 1 times [2020-10-27 20:09:21,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:21,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162686670] [2020-10-27 20:09:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:21,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4919 [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:26,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:26,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:26,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:26,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:26,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:26,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:26,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162686670] [2020-10-27 20:09:26,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:26,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:26,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660922667] [2020-10-27 20:09:26,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:26,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:26,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:26,864 INFO L87 Difference]: Start difference. First operand 30729 states and 44552 transitions. Second operand 4 states. [2020-10-27 20:09:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:27,542 INFO L93 Difference]: Finished difference Result 32781 states and 47627 transitions. [2020-10-27 20:09:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:27,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 20:09:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:27,613 INFO L225 Difference]: With dead ends: 32781 [2020-10-27 20:09:27,613 INFO L226 Difference]: Without dead ends: 32778 [2020-10-27 20:09:27,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32778 states. [2020-10-27 20:09:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32778 to 30729. [2020-10-27 20:09:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30729 states. [2020-10-27 20:09:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30729 states to 30729 states and 44040 transitions. [2020-10-27 20:09:28,654 INFO L78 Accepts]: Start accepts. Automaton has 30729 states and 44040 transitions. Word has length 32 [2020-10-27 20:09:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:28,654 INFO L481 AbstractCegarLoop]: Abstraction has 30729 states and 44040 transitions. [2020-10-27 20:09:28,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 30729 states and 44040 transitions. [2020-10-27 20:09:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:09:28,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:28,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:28,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:09:28,713 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:28,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1226959747, now seen corresponding path program 1 times [2020-10-27 20:09:28,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:28,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342657638] [2020-10-27 20:09:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:28,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4658 [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:33,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:33,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:33,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:33,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:33,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342657638] [2020-10-27 20:09:33,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:33,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:33,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361778997] [2020-10-27 20:09:33,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:33,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:33,443 INFO L87 Difference]: Start difference. First operand 30729 states and 44040 transitions. Second operand 4 states. [2020-10-27 20:09:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:34,235 INFO L93 Difference]: Finished difference Result 50188 states and 70666 transitions. [2020-10-27 20:09:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:34,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 20:09:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:34,310 INFO L225 Difference]: With dead ends: 50188 [2020-10-27 20:09:34,310 INFO L226 Difference]: Without dead ends: 50185 [2020-10-27 20:09:34,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50185 states. [2020-10-27 20:09:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50185 to 48137. [2020-10-27 20:09:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48137 states. [2020-10-27 20:09:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48137 states to 48137 states and 67592 transitions. [2020-10-27 20:09:35,697 INFO L78 Accepts]: Start accepts. Automaton has 48137 states and 67592 transitions. Word has length 33 [2020-10-27 20:09:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:35,697 INFO L481 AbstractCegarLoop]: Abstraction has 48137 states and 67592 transitions. [2020-10-27 20:09:35,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48137 states and 67592 transitions. [2020-10-27 20:09:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:09:35,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:35,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:35,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:09:35,807 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1788143871, now seen corresponding path program 1 times [2020-10-27 20:09:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:35,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259690982] [2020-10-27 20:09:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:35,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4443 [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:40,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:40,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:40,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:40,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:40,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:09:40,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:40,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:40,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:40,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:40,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:09:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259690982] [2020-10-27 20:09:40,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:40,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:40,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955970924] [2020-10-27 20:09:40,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:40,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:40,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:40,303 INFO L87 Difference]: Start difference. First operand 48137 states and 67592 transitions. Second operand 4 states. [2020-10-27 20:09:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:41,392 INFO L93 Difference]: Finished difference Result 108553 states and 152584 transitions. [2020-10-27 20:09:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:41,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 20:09:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:41,395 INFO L225 Difference]: With dead ends: 108553 [2020-10-27 20:09:41,395 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:09:41,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:09:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:09:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:09:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:09:41,488 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-10-27 20:09:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:41,489 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:09:41,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:09:41,489 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:09:41,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:09:41,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.