/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:25:30,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:25:30,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:25:30,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:25:30,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:25:30,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:25:30,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:25:30,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:25:30,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:25:30,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:25:30,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:25:30,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:25:30,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:25:30,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:25:30,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:25:30,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:25:30,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:25:30,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:25:30,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:25:30,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:25:30,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:25:30,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:25:30,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:25:30,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:25:30,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:25:30,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:25:30,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:25:30,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:25:30,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:25:30,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:25:30,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:25:30,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:25:30,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:25:30,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:25:30,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:25:30,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:25:30,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:25:30,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:25:30,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:25:30,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:25:30,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:25:30,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:25:30,886 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:25:30,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:25:30,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:25:30,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:25:30,892 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:25:30,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:25:30,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:25:30,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:25:30,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:25:30,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:25:30,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:25:30,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:25:30,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:25:30,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:25:30,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:25:30,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:25:30,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:25:30,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:25:30,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:25:30,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:25:30,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:25:30,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:25:30,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:25:30,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:25:30,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:25:30,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:25:30,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:25:30,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:25:30,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:25:30,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:25:31,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:25:31,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:25:31,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:25:31,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:25:31,367 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:25:31,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2020-10-28 09:25:31,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de9a26cd7/0fda9c20565c4268bd4673512f2e3dff/FLAGc11d2b02a [2020-10-28 09:25:32,220 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:25:32,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2020-10-28 09:25:32,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de9a26cd7/0fda9c20565c4268bd4673512f2e3dff/FLAGc11d2b02a [2020-10-28 09:25:32,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de9a26cd7/0fda9c20565c4268bd4673512f2e3dff [2020-10-28 09:25:32,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:25:32,599 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:25:32,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:25:32,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:25:32,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:25:32,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c8672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32, skipping insertion in model container [2020-10-28 09:25:32,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:25:32,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:25:32,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:25:32,838 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:25:32,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:25:32,882 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:25:32,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32 WrapperNode [2020-10-28 09:25:32,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:25:32,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:25:32,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:25:32,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:25:32,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... [2020-10-28 09:25:32,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:25:32,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:25:32,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:25:32,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:25:32,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:25:33,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:25:33,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:25:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:25:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:25:33,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:25:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:25:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:25:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:25:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:25:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:25:33,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:25:33,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:25:33,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:25:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:25:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:25:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:25:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:25:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:25:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:25:33,563 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:25:33,563 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:25:33,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:25:33 BoogieIcfgContainer [2020-10-28 09:25:33,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:25:33,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:25:33,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:25:33,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:25:33,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:25:32" (1/3) ... [2020-10-28 09:25:33,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee63062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:25:33, skipping insertion in model container [2020-10-28 09:25:33,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:25:32" (2/3) ... [2020-10-28 09:25:33,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee63062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:25:33, skipping insertion in model container [2020-10-28 09:25:33,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:25:33" (3/3) ... [2020-10-28 09:25:33,581 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound-1.i [2020-10-28 09:25:33,596 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:25:33,602 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:25:33,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:25:33,672 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:25:33,672 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:25:33,672 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:25:33,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:25:33,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:25:33,673 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:25:33,673 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:25:33,673 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:25:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-28 09:25:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:25:33,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:33,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:33,715 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-28 09:25:33,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:33,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966369682] [2020-10-28 09:25:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:34,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:25:34,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:34,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-28 09:25:34,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:34,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:25:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:25:34,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:34,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 09:25:34,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:34,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:34,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:25:34,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966369682] [2020-10-28 09:25:34,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:25:34,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:25:34,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313636917] [2020-10-28 09:25:34,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:25:34,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:34,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:25:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:25:34,382 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-28 09:25:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:34,538 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-28 09:25:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:25:34,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 09:25:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:34,549 INFO L225 Difference]: With dead ends: 53 [2020-10-28 09:25:34,549 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 09:25:34,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:25:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 09:25:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 09:25:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 09:25:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 09:25:34,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-28 09:25:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:34,603 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 09:25:34,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:25:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 09:25:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:25:34,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:34,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:34,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:25:34,605 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-28 09:25:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:34,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022255520] [2020-10-28 09:25:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:34,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:25:34,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:25:34,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-28 09:25:34,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:34,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:34,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:25:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:25:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:25:34,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:34,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:34,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:34,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:34,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:34,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:34,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 09:25:34,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:34,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:34,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:34,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:34,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:34,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:25:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:25:34,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022255520] [2020-10-28 09:25:34,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:25:34,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:25:34,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917339115] [2020-10-28 09:25:34,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:25:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:34,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:25:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:25:34,996 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-28 09:25:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:35,197 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-28 09:25:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:25:35,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 09:25:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:35,199 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:25:35,199 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 09:25:35,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:25:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 09:25:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-28 09:25:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:25:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 09:25:35,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2020-10-28 09:25:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:35,213 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 09:25:35,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:25:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 09:25:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:25:35,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:35,215 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] [2020-10-28 09:25:35,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:25:35,216 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -999640386, now seen corresponding path program 1 times [2020-10-28 09:25:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:35,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536216164] [2020-10-28 09:25:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:35,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:35,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:36,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:36,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:25:36,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:25:36,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-28 09:25:36,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:36,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:25:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:25:36,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:36,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:36,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:36,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:36,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:36,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:25:36,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:36,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:36,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:36,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:36,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:36,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:25:36,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536216164] [2020-10-28 09:25:36,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:36,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:25:36,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099851840] [2020-10-28 09:25:36,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:25:36,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:25:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:25:36,463 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-28 09:25:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:36,707 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-28 09:25:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:25:36,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 09:25:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:36,709 INFO L225 Difference]: With dead ends: 73 [2020-10-28 09:25:36,709 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:25:36,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:25:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:25:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-10-28 09:25:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:25:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 09:25:36,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-28 09:25:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:36,720 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 09:25:36,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:25:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 09:25:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:25:36,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:36,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:36,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:25:36,722 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:36,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1354504774, now seen corresponding path program 2 times [2020-10-28 09:25:36,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:36,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505081301] [2020-10-28 09:25:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:36,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:38,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:38,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:25:38,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:25:38,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1989 [2020-10-28 09:25:38,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:38,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:25:38,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:25:38,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:25:38,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:38,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:38,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:38,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:38,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:38,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:38,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:25:38,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:38,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:38,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:38,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:38,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:38,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:25:38,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505081301] [2020-10-28 09:25:38,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:38,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:25:38,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045296143] [2020-10-28 09:25:38,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:25:38,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:25:38,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:25:38,819 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-28 09:25:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:39,110 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-28 09:25:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:25:39,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 09:25:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:39,112 INFO L225 Difference]: With dead ends: 91 [2020-10-28 09:25:39,112 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:25:39,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:25:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:25:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 34. [2020-10-28 09:25:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:25:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 09:25:39,122 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-28 09:25:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:39,123 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 09:25:39,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:25:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 09:25:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:25:39,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:39,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:39,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:25:39,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1478765238, now seen corresponding path program 3 times [2020-10-28 09:25:39,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:39,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223560643] [2020-10-28 09:25:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:39,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:39,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:42,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:42,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:25:42,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:25:42,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3158 [2020-10-28 09:25:42,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:42,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:42,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:25:42,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:25:42,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:25:42,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:42,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:42,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:42,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:42,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:42,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:42,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:25:42,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:42,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:42,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:42,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:42,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:42,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:25:42,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223560643] [2020-10-28 09:25:42,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:25:42,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456327696] [2020-10-28 09:25:42,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:25:42,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:42,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:25:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:25:42,389 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-10-28 09:25:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:42,724 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-28 09:25:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:25:42,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-28 09:25:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:42,726 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:25:42,726 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:25:42,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:25:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:25:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 38. [2020-10-28 09:25:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:25:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 09:25:42,736 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2020-10-28 09:25:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:42,736 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 09:25:42,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:25:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 09:25:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:25:42,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:42,737 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:42,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:25:42,738 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1598651982, now seen corresponding path program 4 times [2020-10-28 09:25:42,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:42,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168875530] [2020-10-28 09:25:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:42,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:42,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:42,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:47,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:47,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:25:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:25:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:25:47,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:47,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:25:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:25:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:25:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:47,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:47,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:47,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:47,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:25:47,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:47,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:47,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:47,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:47,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:47,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:25:47,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168875530] [2020-10-28 09:25:47,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:47,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:25:47,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270313258] [2020-10-28 09:25:47,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:25:47,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:25:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:25:47,865 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2020-10-28 09:25:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:48,317 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-28 09:25:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:25:48,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 09:25:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:48,319 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:25:48,319 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:25:48,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:25:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:25:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 42. [2020-10-28 09:25:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:25:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-28 09:25:48,338 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-10-28 09:25:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:48,338 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-28 09:25:48,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:25:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-28 09:25:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:25:48,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:48,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:48,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:25:48,341 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:48,341 INFO L82 PathProgramCache]: Analyzing trace with hash -869930322, now seen corresponding path program 5 times [2020-10-28 09:25:48,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:48,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962966595] [2020-10-28 09:25:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:48,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:48,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:53,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:53,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:25:53,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:25:53,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:25:53,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:53,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:25:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:25:53,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:25:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:53,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:53,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:53,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:53,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:53,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:53,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 09:25:53,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:53,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:53,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:53,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:53,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:53,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 09:25:53,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962966595] [2020-10-28 09:25:53,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:53,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:25:53,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494038357] [2020-10-28 09:25:53,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:25:53,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:25:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:25:53,632 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2020-10-28 09:25:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:54,166 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-28 09:25:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:25:54,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-28 09:25:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:54,167 INFO L225 Difference]: With dead ends: 54 [2020-10-28 09:25:54,167 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 09:25:54,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:25:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 09:25:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-28 09:25:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:25:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 09:25:54,185 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2020-10-28 09:25:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:54,188 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 09:25:54,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:25:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 09:25:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:25:54,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:54,205 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:54,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:25:54,205 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash 557339400, now seen corresponding path program 1 times [2020-10-28 09:25:54,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:25:54,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377977508] [2020-10-28 09:25:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:25:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:54,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:54,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:54,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:54,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:55,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:59,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:25:59,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:25:59,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:25:59,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:59,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:25:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:25:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:25:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:25:59,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:25:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:59,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:59,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:25:59,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:59,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:25:59,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:59,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:59,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:25:59,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:59,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:25:59,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:25:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:25:59,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:25:59,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:25:59,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:25:59,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:25:59,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:25:59,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:25:59,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:25:59,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:25:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:25:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:25:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:25:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 09:25:59,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377977508] [2020-10-28 09:25:59,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:25:59,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:25:59,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090880497] [2020-10-28 09:25:59,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:25:59,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:25:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:25:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:25:59,370 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 9 states. [2020-10-28 09:25:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:25:59,963 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2020-10-28 09:25:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:25:59,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-28 09:25:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:25:59,965 INFO L225 Difference]: With dead ends: 147 [2020-10-28 09:25:59,965 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:25:59,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:25:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:25:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 52. [2020-10-28 09:25:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:25:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-28 09:25:59,991 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-28 09:25:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:25:59,991 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-28 09:25:59,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:25:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-28 09:25:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:25:59,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:25:59,996 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:25:59,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:25:59,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:25:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:25:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -42790396, now seen corresponding path program 2 times [2020-10-28 09:25:59,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:00,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967773821] [2020-10-28 09:26:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:00,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:00,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:00,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:04,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:05,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:05,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 09:26:05,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:26:05,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:26:05,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:05,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:26:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:26:05,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:26:05,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:05,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:05,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:05,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:05,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:05,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:05,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:26:05,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:05,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:05,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:05,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:05,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:26:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:05,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:05,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:05,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:05,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:05,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:05,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:05,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:05,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:05,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:05,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 09:26:05,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967773821] [2020-10-28 09:26:05,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:05,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:26:05,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796196850] [2020-10-28 09:26:05,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:26:05,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:05,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:26:05,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:26:05,168 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 10 states. [2020-10-28 09:26:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:05,759 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2020-10-28 09:26:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:26:05,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-28 09:26:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:05,762 INFO L225 Difference]: With dead ends: 165 [2020-10-28 09:26:05,762 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:26:05,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:26:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:26:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 56. [2020-10-28 09:26:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:26:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 09:26:05,783 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-10-28 09:26:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:05,783 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 09:26:05,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:26:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 09:26:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:26:05,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:05,784 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:05,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:26:05,785 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash -735124736, now seen corresponding path program 3 times [2020-10-28 09:26:05,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:05,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897718759] [2020-10-28 09:26:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:05,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:05,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:06,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:10,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:10,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:26:10,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:10,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:26:10,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:10,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:10,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:26:10,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:10,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:26:10,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:10,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:10,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:10,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:10,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:10,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:26:10,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:10,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:10,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:10,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:26:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:10,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:10,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:10,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:10,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:10,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:10,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:10,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:10,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:10,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:10,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:10,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 09:26:10,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897718759] [2020-10-28 09:26:10,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:10,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:26:10,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051497525] [2020-10-28 09:26:10,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:26:10,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:26:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:26:10,978 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 11 states. [2020-10-28 09:26:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:11,788 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2020-10-28 09:26:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:26:11,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-28 09:26:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:11,790 INFO L225 Difference]: With dead ends: 183 [2020-10-28 09:26:11,790 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 09:26:11,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:26:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 09:26:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 60. [2020-10-28 09:26:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:26:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 09:26:11,802 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-10-28 09:26:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:11,803 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 09:26:11,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:26:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 09:26:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:26:11,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:11,804 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:11,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:26:11,804 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash 840353276, now seen corresponding path program 4 times [2020-10-28 09:26:11,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:11,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758733118] [2020-10-28 09:26:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:11,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:11,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:12,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:16,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:16,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:26:16,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:16,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:26:16,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:16,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:16,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:26:16,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:26:16,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:26:16,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:17,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:17,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:17,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:17,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:17,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:26:17,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:17,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:17,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:17,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:26:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:17,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:17,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:17,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:17,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:17,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:17,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:17,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:17,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:17,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:17,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:17,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:26:17,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758733118] [2020-10-28 09:26:17,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:17,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:26:17,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949367259] [2020-10-28 09:26:17,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:26:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:26:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:26:17,043 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 12 states. [2020-10-28 09:26:18,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:18,039 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2020-10-28 09:26:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:26:18,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-28 09:26:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:18,041 INFO L225 Difference]: With dead ends: 201 [2020-10-28 09:26:18,042 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 09:26:18,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:26:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 09:26:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 64. [2020-10-28 09:26:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:26:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-28 09:26:18,055 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-28 09:26:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:18,055 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-28 09:26:18,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:26:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-28 09:26:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:26:18,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:18,056 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:18,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:26:18,057 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2057979144, now seen corresponding path program 5 times [2020-10-28 09:26:18,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:18,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811382654] [2020-10-28 09:26:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:18,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:18,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:18,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:23,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:23,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:26:23,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:23,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:26:23,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:23,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:23,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:26:23,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:23,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:26:23,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:26:23,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:23,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:23,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:23,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:23,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:23,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:23,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:23,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:23,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:23,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:23,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:26:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:23,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:23,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:23,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:23,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:23,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:23,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:23,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:23,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-28 09:26:23,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811382654] [2020-10-28 09:26:23,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:23,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:26:23,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441182635] [2020-10-28 09:26:23,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:26:23,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:26:23,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:26:23,304 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 13 states. [2020-10-28 09:26:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:24,379 INFO L93 Difference]: Finished difference Result 219 states and 224 transitions. [2020-10-28 09:26:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:26:24,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-28 09:26:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:24,383 INFO L225 Difference]: With dead ends: 219 [2020-10-28 09:26:24,383 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 09:26:24,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:26:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 09:26:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 68. [2020-10-28 09:26:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:26:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 09:26:24,399 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-28 09:26:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:24,399 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 09:26:24,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:26:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 09:26:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:26:24,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:24,400 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:24,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:26:24,401 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1651064332, now seen corresponding path program 6 times [2020-10-28 09:26:24,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:24,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322236936] [2020-10-28 09:26:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:24,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:24,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:24,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:29,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:26:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:29,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:29,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:29,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:29,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:29,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:29,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:29,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:29,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:29,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:29,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:29,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:29,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:26:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:29,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:29,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:29,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:29,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:29,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:29,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:29,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:29,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:29,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:29,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:29,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-28 09:26:29,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322236936] [2020-10-28 09:26:29,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:29,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:26:29,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516920722] [2020-10-28 09:26:29,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:26:29,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:26:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:26:29,639 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 14 states. [2020-10-28 09:26:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:30,694 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2020-10-28 09:26:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:26:30,695 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-28 09:26:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:30,696 INFO L225 Difference]: With dead ends: 237 [2020-10-28 09:26:30,697 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 09:26:30,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:26:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 09:26:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 72. [2020-10-28 09:26:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:26:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 09:26:30,716 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-28 09:26:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:30,716 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 09:26:30,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:26:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 09:26:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:26:30,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:30,717 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:30,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:26:30,718 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:30,719 INFO L82 PathProgramCache]: Analyzing trace with hash 738515696, now seen corresponding path program 7 times [2020-10-28 09:26:30,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:30,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975080788] [2020-10-28 09:26:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:30,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:30,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:30,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:35,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:26:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:35,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:35,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:35,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:35,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:35,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:35,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:35,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:26:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:35,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:35,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:35,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:35,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:35,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:35,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-28 09:26:35,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975080788] [2020-10-28 09:26:35,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:35,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:26:35,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068390661] [2020-10-28 09:26:35,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:26:35,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:26:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:26:35,962 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 15 states. [2020-10-28 09:26:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:37,157 INFO L93 Difference]: Finished difference Result 255 states and 260 transitions. [2020-10-28 09:26:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:26:37,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-28 09:26:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:37,160 INFO L225 Difference]: With dead ends: 255 [2020-10-28 09:26:37,161 INFO L226 Difference]: Without dead ends: 212 [2020-10-28 09:26:37,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:26:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-28 09:26:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 76. [2020-10-28 09:26:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:26:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-28 09:26:37,189 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-28 09:26:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:37,189 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-28 09:26:37,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:26:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-28 09:26:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:26:37,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:37,193 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:37,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:26:37,195 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1128990188, now seen corresponding path program 8 times [2020-10-28 09:26:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:37,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42753938] [2020-10-28 09:26:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:37,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:37,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:37,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:42,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:42,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:26:42,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:42,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:26:42,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:42,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:42,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:26:42,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:42,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:26:42,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:42,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:42,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:42,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:42,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:26:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:42,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:42,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:42,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 09:26:42,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42753938] [2020-10-28 09:26:42,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:42,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:26:42,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316292553] [2020-10-28 09:26:42,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:26:42,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:42,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:26:42,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:26:42,451 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 16 states. [2020-10-28 09:26:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:43,907 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2020-10-28 09:26:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:26:43,908 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-28 09:26:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:43,911 INFO L225 Difference]: With dead ends: 273 [2020-10-28 09:26:43,911 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 09:26:43,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:26:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 09:26:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 80. [2020-10-28 09:26:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:26:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 09:26:43,941 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-28 09:26:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:43,942 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 09:26:43,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:26:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 09:26:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:26:43,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:43,946 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:43,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:26:43,946 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash -678149400, now seen corresponding path program 9 times [2020-10-28 09:26:43,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:43,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395893760] [2020-10-28 09:26:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:44,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:44,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:45,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:48,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:48,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:26:48,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:49,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:49,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:49,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:49,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:49,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:49,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:49,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:49,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:49,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:26:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:49,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:49,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:49,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:49,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:49,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-28 09:26:49,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395893760] [2020-10-28 09:26:49,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:49,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:26:49,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216435565] [2020-10-28 09:26:49,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:26:49,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:49,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:26:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:26:49,232 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 17 states. [2020-10-28 09:26:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:50,600 INFO L93 Difference]: Finished difference Result 291 states and 296 transitions. [2020-10-28 09:26:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:26:50,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-10-28 09:26:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:50,602 INFO L225 Difference]: With dead ends: 291 [2020-10-28 09:26:50,602 INFO L226 Difference]: Without dead ends: 244 [2020-10-28 09:26:50,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:26:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-28 09:26:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 84. [2020-10-28 09:26:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:26:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-28 09:26:50,618 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-28 09:26:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:50,619 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-28 09:26:50,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:26:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-28 09:26:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:26:50,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:50,620 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:50,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:26:50,620 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:50,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1049334244, now seen corresponding path program 10 times [2020-10-28 09:26:50,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:50,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176357757] [2020-10-28 09:26:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:50,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:50,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:51,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:55,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:55,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:26:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:55,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:55,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:55,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:55,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:26:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:55,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:55,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:55,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:26:55,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176357757] [2020-10-28 09:26:55,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:55,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:26:55,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921256718] [2020-10-28 09:26:55,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:26:55,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:55,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:26:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:26:55,916 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 18 states. [2020-10-28 09:26:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:57,488 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2020-10-28 09:26:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:26:57,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-28 09:26:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:57,492 INFO L225 Difference]: With dead ends: 309 [2020-10-28 09:26:57,492 INFO L226 Difference]: Without dead ends: 260 [2020-10-28 09:26:57,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:26:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-28 09:26:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 88. [2020-10-28 09:26:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:26:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 09:26:57,508 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-28 09:26:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:57,508 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 09:26:57,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:26:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 09:26:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:26:57,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:57,509 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:57,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:26:57,509 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:57,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1352928544, now seen corresponding path program 11 times [2020-10-28 09:26:57,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:57,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391714980] [2020-10-28 09:26:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:57,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:57,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:27:02,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:27:02,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:27:02,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:02,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:02,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:02,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:02,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:02,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:02,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:27:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:02,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-28 09:27:02,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391714980] [2020-10-28 09:27:02,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:02,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:27:02,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151473651] [2020-10-28 09:27:02,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:27:02,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:27:02,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:27:02,832 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 19 states. [2020-10-28 09:27:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:04,604 INFO L93 Difference]: Finished difference Result 327 states and 332 transitions. [2020-10-28 09:27:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:27:04,604 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-28 09:27:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:04,607 INFO L225 Difference]: With dead ends: 327 [2020-10-28 09:27:04,608 INFO L226 Difference]: Without dead ends: 276 [2020-10-28 09:27:04,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:27:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-28 09:27:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 92. [2020-10-28 09:27:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:27:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-28 09:27:04,623 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2020-10-28 09:27:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:04,624 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-28 09:27:04,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:27:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-28 09:27:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:27:04,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:04,625 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:04,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:27:04,625 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1028626980, now seen corresponding path program 12 times [2020-10-28 09:27:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:04,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686328509] [2020-10-28 09:27:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:04,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:04,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:05,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:07,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:09,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:09,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:27:09,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:27:09,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 09:27:09,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:09,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:27:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:27:09,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:27:09,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:09,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:09,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:09,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:09,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:27:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:09,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:09,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:09,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:09,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:09,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:09,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:09,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:09,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:09,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:09,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:09,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-28 09:27:09,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686328509] [2020-10-28 09:27:09,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:09,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:27:09,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384253794] [2020-10-28 09:27:09,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:27:09,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:27:09,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:27:09,981 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 20 states. [2020-10-28 09:27:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:11,820 INFO L93 Difference]: Finished difference Result 345 states and 350 transitions. [2020-10-28 09:27:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:27:11,820 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-10-28 09:27:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:11,822 INFO L225 Difference]: With dead ends: 345 [2020-10-28 09:27:11,822 INFO L226 Difference]: Without dead ends: 292 [2020-10-28 09:27:11,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:27:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-28 09:27:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 96. [2020-10-28 09:27:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:27:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-28 09:27:11,840 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2020-10-28 09:27:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:11,840 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-28 09:27:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:27:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-28 09:27:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 09:27:11,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:11,841 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:11,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:27:11,842 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash -223089960, now seen corresponding path program 13 times [2020-10-28 09:27:11,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:11,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293064366] [2020-10-28 09:27:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:11,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:12,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:14,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:16,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:27:16,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:17,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:17,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:17,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:17,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:17,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:17,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:17,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:17,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:17,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:17,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:17,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:27:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:17,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:17,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:17,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:17,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-28 09:27:17,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293064366] [2020-10-28 09:27:17,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:17,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:27:17,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531750835] [2020-10-28 09:27:17,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:27:17,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:27:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:27:17,229 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2020-10-28 09:27:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:19,210 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2020-10-28 09:27:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:27:19,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-10-28 09:27:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:19,214 INFO L225 Difference]: With dead ends: 363 [2020-10-28 09:27:19,214 INFO L226 Difference]: Without dead ends: 308 [2020-10-28 09:27:19,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:27:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-28 09:27:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 100. [2020-10-28 09:27:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 09:27:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-28 09:27:19,240 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-10-28 09:27:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:19,242 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-28 09:27:19,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:27:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-28 09:27:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:27:19,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:19,247 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:19,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:27:19,247 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash 454132180, now seen corresponding path program 14 times [2020-10-28 09:27:19,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:19,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173064520] [2020-10-28 09:27:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:20,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:22,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:24,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:24,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 09:27:24,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:27:24,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 09:27:24,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:24,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:24,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:27:24,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 09:27:24,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:27:24,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:24,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:24,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:24,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:24,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:24,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:24,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:24,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:24,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:24,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:24,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:24,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:24,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:24,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 09:27:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:24,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:24,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:24,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-28 09:27:24,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173064520] [2020-10-28 09:27:24,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:24,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:27:24,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619020940] [2020-10-28 09:27:24,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:27:24,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:24,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:27:24,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:27:24,706 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 22 states. [2020-10-28 09:27:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:26,839 INFO L93 Difference]: Finished difference Result 381 states and 386 transitions. [2020-10-28 09:27:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:27:26,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 97 [2020-10-28 09:27:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:26,842 INFO L225 Difference]: With dead ends: 381 [2020-10-28 09:27:26,842 INFO L226 Difference]: Without dead ends: 324 [2020-10-28 09:27:26,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:27:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-28 09:27:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 104. [2020-10-28 09:27:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 09:27:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-28 09:27:26,861 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-28 09:27:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:26,861 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-28 09:27:26,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:27:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-28 09:27:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:27:26,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:26,863 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:26,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:27:26,863 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:26,864 INFO L82 PathProgramCache]: Analyzing trace with hash -118215984, now seen corresponding path program 15 times [2020-10-28 09:27:26,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:26,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079818492] [2020-10-28 09:27:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:26,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:26,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:29,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:27:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:27:31,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:32,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:32,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:32,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:32,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:32,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:32,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:32,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:32,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:32,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:27:32,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 09:27:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:32,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:32,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:32,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:32,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:32,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:32,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:32,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:32,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-28 09:27:32,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079818492] [2020-10-28 09:27:32,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:32,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:27:32,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244549440] [2020-10-28 09:27:32,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:27:32,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:27:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:27:32,321 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 23 states. [2020-10-28 09:27:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:34,576 INFO L93 Difference]: Finished difference Result 399 states and 404 transitions. [2020-10-28 09:27:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:27:34,580 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-10-28 09:27:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:34,583 INFO L225 Difference]: With dead ends: 399 [2020-10-28 09:27:34,583 INFO L226 Difference]: Without dead ends: 340 [2020-10-28 09:27:34,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:27:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-28 09:27:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 108. [2020-10-28 09:27:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:27:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-28 09:27:34,608 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-28 09:27:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:34,608 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-28 09:27:34,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:27:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-28 09:27:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 09:27:34,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:34,610 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:34,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:27:34,610 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1425611316, now seen corresponding path program 16 times [2020-10-28 09:27:34,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:34,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186484674] [2020-10-28 09:27:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:34,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:42,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7552 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:27:42,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:42,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:42,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:42,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:42,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:42,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:42,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:42,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:42,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:42,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 09:27:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:42,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:42,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:42,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-28 09:27:42,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186484674] [2020-10-28 09:27:42,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:42,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:27:42,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899293955] [2020-10-28 09:27:42,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:27:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:42,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:27:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:27:42,648 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 24 states. [2020-10-28 09:27:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:45,112 INFO L93 Difference]: Finished difference Result 417 states and 422 transitions. [2020-10-28 09:27:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 09:27:45,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-10-28 09:27:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:45,116 INFO L225 Difference]: With dead ends: 417 [2020-10-28 09:27:45,116 INFO L226 Difference]: Without dead ends: 356 [2020-10-28 09:27:45,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:27:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-28 09:27:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 112. [2020-10-28 09:27:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 09:27:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-28 09:27:45,139 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2020-10-28 09:27:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:45,139 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-28 09:27:45,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:27:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-28 09:27:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:27:45,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:45,140 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:45,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:27:45,141 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:45,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:45,141 INFO L82 PathProgramCache]: Analyzing trace with hash 829731528, now seen corresponding path program 17 times [2020-10-28 09:27:45,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:45,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381005781] [2020-10-28 09:27:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:45,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:45,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:49,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:54,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:54,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8962 [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:27:54,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:54,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:54,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:54,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:54,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:54,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:54,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:54,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:54,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:54,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 09:27:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:54,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:54,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:54,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:54,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:54,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:54,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:54,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:54,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:54,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:54,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:54,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2020-10-28 09:27:54,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381005781] [2020-10-28 09:27:54,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:54,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:27:54,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775046641] [2020-10-28 09:27:54,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:27:54,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:54,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:27:54,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:27:54,624 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 25 states. [2020-10-28 09:27:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:57,279 INFO L93 Difference]: Finished difference Result 435 states and 440 transitions. [2020-10-28 09:27:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 09:27:57,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 109 [2020-10-28 09:27:57,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:57,284 INFO L225 Difference]: With dead ends: 435 [2020-10-28 09:27:57,284 INFO L226 Difference]: Without dead ends: 372 [2020-10-28 09:27:57,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:27:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-28 09:27:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 116. [2020-10-28 09:27:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 09:27:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-28 09:27:57,309 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2020-10-28 09:27:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:57,309 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-28 09:27:57,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:27:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-28 09:27:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 09:27:57,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:57,310 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:57,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:27:57,310 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash -303525436, now seen corresponding path program 18 times [2020-10-28 09:27:57,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:57,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462977575] [2020-10-28 09:27:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:57,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:04,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:04,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 09:28:04,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:28:04,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7420 [2020-10-28 09:28:04,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:04,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:28:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:28:04,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:05,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:05,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:05,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:05,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:05,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:05,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:05,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:05,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-28 09:28:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:05,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:05,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-28 09:28:05,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462977575] [2020-10-28 09:28:05,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:05,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:28:05,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32302929] [2020-10-28 09:28:05,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:28:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:28:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:28:05,265 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 26 states. [2020-10-28 09:28:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:08,064 INFO L93 Difference]: Finished difference Result 453 states and 458 transitions. [2020-10-28 09:28:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 09:28:08,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 113 [2020-10-28 09:28:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:08,068 INFO L225 Difference]: With dead ends: 453 [2020-10-28 09:28:08,068 INFO L226 Difference]: Without dead ends: 388 [2020-10-28 09:28:08,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:28:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-28 09:28:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 120. [2020-10-28 09:28:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:28:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-28 09:28:08,096 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2020-10-28 09:28:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:08,096 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-28 09:28:08,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:28:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-28 09:28:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 09:28:08,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:08,097 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:08,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:28:08,098 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash 596476608, now seen corresponding path program 19 times [2020-10-28 09:28:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:08,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071910178] [2020-10-28 09:28:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:08,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 09:28:13,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:28:13,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5531 [2020-10-28 09:28:13,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:28:13,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:13,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:28:13,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:14,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:14,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:14,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:14,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:14,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:14,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:14,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:14,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 09:28:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:14,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:14,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:14,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:14,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:14,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:14,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-10-28 09:28:14,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071910178] [2020-10-28 09:28:14,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:14,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:28:14,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257425101] [2020-10-28 09:28:14,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:28:14,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:28:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:28:14,207 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 27 states. [2020-10-28 09:28:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:17,062 INFO L93 Difference]: Finished difference Result 471 states and 476 transitions. [2020-10-28 09:28:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 09:28:17,063 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 117 [2020-10-28 09:28:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:17,066 INFO L225 Difference]: With dead ends: 471 [2020-10-28 09:28:17,066 INFO L226 Difference]: Without dead ends: 404 [2020-10-28 09:28:17,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 09:28:17,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-28 09:28:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 124. [2020-10-28 09:28:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 09:28:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-28 09:28:17,094 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-28 09:28:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:17,095 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-28 09:28:17,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:28:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-28 09:28:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:28:17,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:17,096 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:17,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:28:17,096 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1997440444, now seen corresponding path program 20 times [2020-10-28 09:28:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:17,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708701983] [2020-10-28 09:28:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:17,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:23,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5998 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:28:23,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:23,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:23,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:23,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 09:28:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:23,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:23,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-28 09:28:23,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708701983] [2020-10-28 09:28:23,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:23,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:28:23,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890340639] [2020-10-28 09:28:23,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:28:23,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:28:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:28:23,723 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 28 states. [2020-10-28 09:28:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:26,881 INFO L93 Difference]: Finished difference Result 489 states and 494 transitions. [2020-10-28 09:28:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 09:28:26,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 121 [2020-10-28 09:28:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:26,884 INFO L225 Difference]: With dead ends: 489 [2020-10-28 09:28:26,885 INFO L226 Difference]: Without dead ends: 420 [2020-10-28 09:28:26,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:28:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-28 09:28:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 128. [2020-10-28 09:28:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 09:28:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-28 09:28:26,909 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 121 [2020-10-28 09:28:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:26,909 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-28 09:28:26,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:28:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-28 09:28:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:28:26,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:26,910 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:26,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:28:26,911 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:26,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1855363768, now seen corresponding path program 21 times [2020-10-28 09:28:26,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:26,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506926270] [2020-10-28 09:28:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:26,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:28,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:31,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:31,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 09:28:31,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:28:31,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:28:31,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:31,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:28:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 09:28:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:28:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:32,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:32,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:32,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:32,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:32,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:32,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:32,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:32,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:32,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:32,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-28 09:28:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:32,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:32,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:32,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:32,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:32,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:32,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:32,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:32,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-10-28 09:28:32,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506926270] [2020-10-28 09:28:32,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:32,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:28:32,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413490974] [2020-10-28 09:28:32,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:28:32,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:32,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:28:32,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:28:32,610 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 29 states. [2020-10-28 09:28:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:35,867 INFO L93 Difference]: Finished difference Result 507 states and 512 transitions. [2020-10-28 09:28:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 09:28:35,868 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 125 [2020-10-28 09:28:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:35,871 INFO L225 Difference]: With dead ends: 507 [2020-10-28 09:28:35,871 INFO L226 Difference]: Without dead ends: 436 [2020-10-28 09:28:35,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 09:28:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-28 09:28:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 132. [2020-10-28 09:28:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:28:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-28 09:28:35,906 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 125 [2020-10-28 09:28:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:35,906 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-28 09:28:35,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:28:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-28 09:28:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 09:28:35,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:35,907 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:35,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:28:35,908 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash -237977164, now seen corresponding path program 22 times [2020-10-28 09:28:35,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:35,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595154623] [2020-10-28 09:28:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:35,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:37,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5612 [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:28:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:42,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:42,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:42,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:42,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:42,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:42,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-28 09:28:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:42,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-10-28 09:28:42,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595154623] [2020-10-28 09:28:42,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:42,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:28:42,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521624767] [2020-10-28 09:28:42,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:28:42,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:42,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:28:42,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:28:42,215 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 30 states. [2020-10-28 09:28:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:45,760 INFO L93 Difference]: Finished difference Result 525 states and 530 transitions. [2020-10-28 09:28:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 09:28:45,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 129 [2020-10-28 09:28:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:45,764 INFO L225 Difference]: With dead ends: 525 [2020-10-28 09:28:45,764 INFO L226 Difference]: Without dead ends: 452 [2020-10-28 09:28:45,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:28:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-28 09:28:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 136. [2020-10-28 09:28:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 09:28:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2020-10-28 09:28:45,798 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 129 [2020-10-28 09:28:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:45,798 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2020-10-28 09:28:45,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:28:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2020-10-28 09:28:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 09:28:45,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:45,800 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:45,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:28:45,800 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:45,800 INFO L82 PathProgramCache]: Analyzing trace with hash -907543888, now seen corresponding path program 23 times [2020-10-28 09:28:45,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:45,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495730163] [2020-10-28 09:28:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:45,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:47,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:52,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:52,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 09:28:52,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:28:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6232 [2020-10-28 09:28:52,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:52,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:28:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:52,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:28:52,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:52,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:52,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:52,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:52,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:52,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-28 09:28:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:52,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:52,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-28 09:28:52,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495730163] [2020-10-28 09:28:52,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:52,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:28:52,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741214453] [2020-10-28 09:28:52,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:28:52,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:52,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:28:52,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:28:52,766 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 31 states. [2020-10-28 09:28:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:56,521 INFO L93 Difference]: Finished difference Result 543 states and 548 transitions. [2020-10-28 09:28:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 09:28:56,522 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 133 [2020-10-28 09:28:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:56,525 INFO L225 Difference]: With dead ends: 543 [2020-10-28 09:28:56,525 INFO L226 Difference]: Without dead ends: 468 [2020-10-28 09:28:56,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 09:28:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-28 09:28:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 140. [2020-10-28 09:28:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 09:28:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-10-28 09:28:56,563 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2020-10-28 09:28:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:56,564 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-10-28 09:28:56,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:28:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-10-28 09:28:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 09:28:56,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:56,565 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:56,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:28:56,565 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:56,565 INFO L82 PathProgramCache]: Analyzing trace with hash 562513324, now seen corresponding path program 24 times [2020-10-28 09:28:56,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:56,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521891817] [2020-10-28 09:28:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:56,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking...