/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-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:50:58,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:50:58,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:50:58,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:50:58,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:50:58,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:50:58,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:50:58,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:50:58,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:50:58,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:50:58,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:50:58,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:50:58,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:50:58,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:50:58,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:50:58,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:50:58,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:50:58,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:50:58,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:50:59,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:50:59,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:50:59,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:50:59,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:50:59,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:50:59,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:50:59,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:50:59,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:50:59,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:50:59,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:50:59,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:50:59,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:50:59,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:50:59,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:50:59,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:50:59,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:50:59,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:50:59,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:50:59,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:50:59,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:50:59,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:50:59,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:50:59,056 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 08:50:59,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:50:59,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:50:59,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:50:59,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:50:59,114 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:50:59,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:50:59,115 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:50:59,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:50:59,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:50:59,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:50:59,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:50:59,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:50:59,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:50:59,118 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:50:59,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:50:59,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:50:59,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:50:59,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:50:59,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:50:59,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:50:59,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:50:59,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:50:59,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:50:59,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:50:59,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:50:59,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:50:59,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:50:59,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:50:59,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:50:59,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:50:59,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:50:59,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:50:59,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:50:59,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:50:59,602 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:50:59,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-28 08:50:59,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab683f1af/ff01b02f30024adab09084da32da3dc5/FLAG25adada8a [2020-10-28 08:51:00,291 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:51:00,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-28 08:51:00,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab683f1af/ff01b02f30024adab09084da32da3dc5/FLAG25adada8a [2020-10-28 08:51:00,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab683f1af/ff01b02f30024adab09084da32da3dc5 [2020-10-28 08:51:00,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:51:00,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:51:00,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:00,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:51:00,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:51:00,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:00" (1/1) ... [2020-10-28 08:51:00,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd6ea22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:00, skipping insertion in model container [2020-10-28 08:51:00,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:00" (1/1) ... [2020-10-28 08:51:00,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:51:00,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:51:00,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:00,919 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:51:00,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:01,009 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:51:01,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01 WrapperNode [2020-10-28 08:51:01,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:01,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:51:01,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:51:01,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:51:01,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (1/1) ... [2020-10-28 08:51:01,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (1/1) ... [2020-10-28 08:51:01,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (1/1) ... [2020-10-28 08:51:01,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (1/1) ... [2020-10-28 08:51:01,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (1/1) ... [2020-10-28 08:51:01,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (1/1) ... [2020-10-28 08:51:01,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (1/1) ... [2020-10-28 08:51:01,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:51:01,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:51:01,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:51:01,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:51:01,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (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 08:51:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:51:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:51:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:51:01,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:51:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:51:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:51:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:51:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:51:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:51:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:51:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:51:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:51:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:51:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:51:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:51:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:51:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:51:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:51:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:51:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:01,688 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:01,692 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-28 08:51:01,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:01 BoogieIcfgContainer [2020-10-28 08:51:01,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:01,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:01,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:01,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:01,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:51:00" (1/3) ... [2020-10-28 08:51:01,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550f715e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:01, skipping insertion in model container [2020-10-28 08:51:01,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:01" (2/3) ... [2020-10-28 08:51:01,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550f715e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:01, skipping insertion in model container [2020-10-28 08:51:01,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:01" (3/3) ... [2020-10-28 08:51:01,706 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2020-10-28 08:51:01,722 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:01,728 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:01,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:01,772 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:01,772 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:01,773 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:01,773 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:01,773 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:01,773 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:01,773 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:01,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-28 08:51:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:01,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:01,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:01,802 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:01,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1006986874, now seen corresponding path program 1 times [2020-10-28 08:51:01,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:01,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301427341] [2020-10-28 08:51:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:02,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:02,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 08:51:02,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:02,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:51:02,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:02,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:51:02,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:02,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:02,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:51:02,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:02,296 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 08:51:02,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301427341] [2020-10-28 08:51:02,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:02,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:02,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971629968] [2020-10-28 08:51:02,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:02,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:02,325 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-28 08:51:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:02,499 INFO L93 Difference]: Finished difference Result 89 states and 133 transitions. [2020-10-28 08:51:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:02,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 08:51:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:02,512 INFO L225 Difference]: With dead ends: 89 [2020-10-28 08:51:02,512 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:51:02,517 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 08:51:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:51:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:51:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:51:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-28 08:51:02,589 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-28 08:51:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:02,590 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-28 08:51:02,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-28 08:51:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:02,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:02,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:02,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:02,595 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:02,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1889588042, now seen corresponding path program 1 times [2020-10-28 08:51:02,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:02,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469654941] [2020-10-28 08:51:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:02,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-28 08:51:02,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:02,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:02,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:03,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:03,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:03,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:51:03,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:03,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:03,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:51:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:03,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469654941] [2020-10-28 08:51:03,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:03,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659671463] [2020-10-28 08:51:03,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:03,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:03,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:03,076 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-28 08:51:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:03,260 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-28 08:51:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:03,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 08:51:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:03,262 INFO L225 Difference]: With dead ends: 78 [2020-10-28 08:51:03,262 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 08:51:03,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 08:51:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-28 08:51:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 08:51:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-28 08:51:03,275 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2020-10-28 08:51:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:03,275 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-28 08:51:03,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-28 08:51:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 08:51:03,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:03,276 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] [2020-10-28 08:51:03,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:03,277 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash -888776724, now seen corresponding path program 1 times [2020-10-28 08:51:03,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:03,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015179595] [2020-10-28 08:51:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 08:51:03,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:03,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-28 08:51:03,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:03,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:03,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:03,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:03,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:03,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:03,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015179595] [2020-10-28 08:51:03,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:03,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:03,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246921382] [2020-10-28 08:51:03,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:03,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:03,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:03,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:03,574 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 5 states. [2020-10-28 08:51:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:03,702 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-28 08:51:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:03,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 08:51:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:03,704 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:51:03,704 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:51:03,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:51:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 08:51:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:51:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-10-28 08:51:03,714 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2020-10-28 08:51:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:03,715 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-10-28 08:51:03,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-10-28 08:51:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 08:51:03,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:03,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:03,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:03,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash 572341262, now seen corresponding path program 2 times [2020-10-28 08:51:03,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:03,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829927707] [2020-10-28 08:51:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:04,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 08:51:04,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:04,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-28 08:51:04,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:04,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:04,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:04,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:04,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:04,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:04,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:04,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:04,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829927707] [2020-10-28 08:51:04,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:04,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:04,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086983210] [2020-10-28 08:51:04,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:04,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:04,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:04,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:04,089 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 4 states. [2020-10-28 08:51:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:04,266 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-10-28 08:51:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:04,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 08:51:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:04,268 INFO L225 Difference]: With dead ends: 78 [2020-10-28 08:51:04,268 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:51:04,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:51:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-28 08:51:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 08:51:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-28 08:51:04,282 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 22 [2020-10-28 08:51:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:04,283 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-28 08:51:04,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-28 08:51:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 08:51:04,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:04,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:04,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:04,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:04,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2075512815, now seen corresponding path program 1 times [2020-10-28 08:51:04,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:04,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863156487] [2020-10-28 08:51:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 08:51:05,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-28 08:51:05,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:05,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:05,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:05,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:05,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:05,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:05,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:05,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863156487] [2020-10-28 08:51:05,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:05,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:51:05,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604847639] [2020-10-28 08:51:05,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:05,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:05,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:05,222 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2020-10-28 08:51:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:05,383 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2020-10-28 08:51:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:05,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 08:51:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:05,385 INFO L225 Difference]: With dead ends: 91 [2020-10-28 08:51:05,386 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 08:51:05,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 08:51:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-28 08:51:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:51:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-10-28 08:51:05,396 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 24 [2020-10-28 08:51:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:05,396 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-10-28 08:51:05,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-10-28 08:51:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:51:05,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:05,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:05,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:05,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash -724140627, now seen corresponding path program 1 times [2020-10-28 08:51:05,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:05,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165246060] [2020-10-28 08:51:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:51:06,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:51:06,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-28 08:51:06,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:51:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:06,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:06,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:06,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:06,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:06,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165246060] [2020-10-28 08:51:06,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:06,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:51:06,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552721144] [2020-10-28 08:51:06,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:06,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:06,755 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 5 states. [2020-10-28 08:51:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:07,015 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-28 08:51:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:07,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-28 08:51:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:07,017 INFO L225 Difference]: With dead ends: 97 [2020-10-28 08:51:07,018 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:51:07,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:51:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-28 08:51:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:51:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-28 08:51:07,028 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2020-10-28 08:51:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:07,029 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-28 08:51:07,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:07,029 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-28 08:51:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:51:07,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:07,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:07,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:07,031 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash 955545094, now seen corresponding path program 1 times [2020-10-28 08:51:07,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:07,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375989809] [2020-10-28 08:51:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:51:08,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:08,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-10-28 08:51:08,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:08,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:08,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:51:08,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:09,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:09,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:09,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:09,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:09,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:09,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:09,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:09,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:09,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 08:51:09,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375989809] [2020-10-28 08:51:09,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:09,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 08:51:09,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732012208] [2020-10-28 08:51:09,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:09,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:09,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:09,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:09,146 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 8 states. [2020-10-28 08:51:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:09,596 INFO L93 Difference]: Finished difference Result 100 states and 128 transitions. [2020-10-28 08:51:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:09,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 08:51:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:09,598 INFO L225 Difference]: With dead ends: 100 [2020-10-28 08:51:09,598 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:51:09,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:51:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-28 08:51:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:51:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-10-28 08:51:09,616 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 28 [2020-10-28 08:51:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:09,616 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-10-28 08:51:09,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-10-28 08:51:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 08:51:09,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:09,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:09,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:09,623 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash -711929284, now seen corresponding path program 1 times [2020-10-28 08:51:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:09,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897461890] [2020-10-28 08:51:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:09,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:09,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:13,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 08:51:13,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:13,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3585 [2020-10-28 08:51:13,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:13,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:13,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:13,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:51:13,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:13,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:51:13,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:13,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:13,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:13,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:13,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:13,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:13,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:13,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:13,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 08:51:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:13,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:13,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:13,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:13,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:13,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:13,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:13,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:13,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:13,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:51:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897461890] [2020-10-28 08:51:13,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:13,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:13,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541449050] [2020-10-28 08:51:13,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:13,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:13,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:13,369 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 7 states. [2020-10-28 08:51:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:13,958 INFO L93 Difference]: Finished difference Result 198 states and 268 transitions. [2020-10-28 08:51:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:13,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-28 08:51:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:13,966 INFO L225 Difference]: With dead ends: 198 [2020-10-28 08:51:13,966 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 08:51:13,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 08:51:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 86. [2020-10-28 08:51:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:51:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2020-10-28 08:51:14,007 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 36 [2020-10-28 08:51:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:14,007 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2020-10-28 08:51:14,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2020-10-28 08:51:14,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:51:14,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:14,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:14,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:14,013 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1917474883, now seen corresponding path program 2 times [2020-10-28 08:51:14,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:14,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726444289] [2020-10-28 08:51:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:14,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:51:19,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:19,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:51:19,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:19,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:51:19,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:51:19,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:19,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:19,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:19,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:19,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:19,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:19,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:19,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 08:51:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:19,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:19,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:19,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:19,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:19,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:51:19,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726444289] [2020-10-28 08:51:19,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:19,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355805740] [2020-10-28 08:51:19,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:19,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:19,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:19,204 INFO L87 Difference]: Start difference. First operand 86 states and 113 transitions. Second operand 8 states. [2020-10-28 08:51:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:19,990 INFO L93 Difference]: Finished difference Result 319 states and 447 transitions. [2020-10-28 08:51:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:19,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-28 08:51:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:19,993 INFO L225 Difference]: With dead ends: 319 [2020-10-28 08:51:19,993 INFO L226 Difference]: Without dead ends: 253 [2020-10-28 08:51:19,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:51:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-28 08:51:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 92. [2020-10-28 08:51:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 08:51:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2020-10-28 08:51:20,011 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 39 [2020-10-28 08:51:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:20,011 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2020-10-28 08:51:20,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2020-10-28 08:51:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 08:51:20,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:20,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:20,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:51:20,014 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:20,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1411497764, now seen corresponding path program 3 times [2020-10-28 08:51:20,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:20,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261944163] [2020-10-28 08:51:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:25,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 08:51:25,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:51:25,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:25,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:25,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:25,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:51:25,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:25,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:25,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:25,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:25,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:25,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:25,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:25,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:25,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 08:51:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:25,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:25,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:25,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:25,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:25,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:51:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261944163] [2020-10-28 08:51:25,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:25,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:25,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627961445] [2020-10-28 08:51:25,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:25,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:25,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:25,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:25,157 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand 8 states. [2020-10-28 08:51:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:25,426 INFO L93 Difference]: Finished difference Result 171 states and 231 transitions. [2020-10-28 08:51:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:25,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-28 08:51:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:25,430 INFO L225 Difference]: With dead ends: 171 [2020-10-28 08:51:25,430 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 08:51:25,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 08:51:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-28 08:51:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 08:51:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2020-10-28 08:51:25,449 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 42 [2020-10-28 08:51:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:25,450 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2020-10-28 08:51:25,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2020-10-28 08:51:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:51:25,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:25,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:25,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:51:25,452 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash 254207395, now seen corresponding path program 4 times [2020-10-28 08:51:25,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:25,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526073604] [2020-10-28 08:51:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:30,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:51:30,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:30,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:51:30,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:30,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:30,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:30,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:30,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:30,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:30,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:30,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:30,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:30,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:30,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:30,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:30,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 08:51:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:30,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:30,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:30,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:30,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:30,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:30,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 08:51:30,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526073604] [2020-10-28 08:51:30,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:30,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:30,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434687628] [2020-10-28 08:51:30,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:30,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:30,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:30,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:30,564 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand 6 states. [2020-10-28 08:51:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:30,712 INFO L93 Difference]: Finished difference Result 182 states and 244 transitions. [2020-10-28 08:51:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:30,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 08:51:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:30,714 INFO L225 Difference]: With dead ends: 182 [2020-10-28 08:51:30,714 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 08:51:30,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 08:51:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-28 08:51:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 08:51:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2020-10-28 08:51:30,725 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 45 [2020-10-28 08:51:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:30,725 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2020-10-28 08:51:30,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2020-10-28 08:51:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:51:30,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:30,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:30,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:51:30,727 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:30,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1984590911, now seen corresponding path program 5 times [2020-10-28 08:51:30,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:30,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233115869] [2020-10-28 08:51:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:51:35,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:35,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:51:35,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:35,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 08:51:35,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 08:51:35,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:35,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:35,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:35,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 08:51:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:35,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:35,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:35,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 08:51:35,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233115869] [2020-10-28 08:51:35,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:35,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714001533] [2020-10-28 08:51:35,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:35,889 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. Second operand 10 states. [2020-10-28 08:51:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:37,002 INFO L93 Difference]: Finished difference Result 475 states and 675 transitions. [2020-10-28 08:51:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:51:37,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-28 08:51:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:37,010 INFO L225 Difference]: With dead ends: 475 [2020-10-28 08:51:37,011 INFO L226 Difference]: Without dead ends: 406 [2020-10-28 08:51:37,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:51:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-28 08:51:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 106. [2020-10-28 08:51:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:51:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2020-10-28 08:51:37,042 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 47 [2020-10-28 08:51:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:37,043 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2020-10-28 08:51:37,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2020-10-28 08:51:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 08:51:37,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:37,046 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:37,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:51:37,046 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash -268733282, now seen corresponding path program 6 times [2020-10-28 08:51:37,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:37,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780558574] [2020-10-28 08:51:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:37,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:42,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:42,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 08:51:42,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:42,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:51:42,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:42,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:42,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:51:42,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:42,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:42,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:42,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:42,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:42,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:42,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:42,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:42,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:42,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:42,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 08:51:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:42,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:42,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:42,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:42,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:42,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:42,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:42,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 08:51:42,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780558574] [2020-10-28 08:51:42,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:42,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511423043] [2020-10-28 08:51:42,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:42,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:42,190 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand 10 states. [2020-10-28 08:51:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:42,508 INFO L93 Difference]: Finished difference Result 191 states and 261 transitions. [2020-10-28 08:51:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:42,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-28 08:51:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:42,510 INFO L225 Difference]: With dead ends: 191 [2020-10-28 08:51:42,511 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 08:51:42,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:51:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 08:51:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-28 08:51:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 08:51:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2020-10-28 08:51:42,537 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 50 [2020-10-28 08:51:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:42,541 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2020-10-28 08:51:42,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2020-10-28 08:51:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:51:42,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:42,543 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:42,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:51:42,543 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1854864735, now seen corresponding path program 7 times [2020-10-28 08:51:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:42,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327864904] [2020-10-28 08:51:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:42,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:42,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:43,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:47,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:51:47,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:47,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:51:47,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:47,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:47,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:47,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:47,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:47,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:47,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:47,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:47,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:47,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 08:51:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:47,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:47,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-28 08:51:47,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327864904] [2020-10-28 08:51:47,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:47,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:47,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757425242] [2020-10-28 08:51:47,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:47,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:47,654 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand 7 states. [2020-10-28 08:51:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:47,803 INFO L93 Difference]: Finished difference Result 208 states and 282 transitions. [2020-10-28 08:51:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:47,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-28 08:51:47,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:47,805 INFO L225 Difference]: With dead ends: 208 [2020-10-28 08:51:47,805 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 08:51:47,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 08:51:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-28 08:51:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 08:51:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2020-10-28 08:51:47,816 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 53 [2020-10-28 08:51:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:47,816 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2020-10-28 08:51:47,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2020-10-28 08:51:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:51:47,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:47,817 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:47,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:51:47,817 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1576970943, now seen corresponding path program 8 times [2020-10-28 08:51:47,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:47,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996356783] [2020-10-28 08:51:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:47,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:49,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:52,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:51:52,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:52,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:51:52,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:52,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:52,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:51:52,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:51:52,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 08:51:52,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:52,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:52,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:52,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:52,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:52,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:52,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:52,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:52,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:52,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:52,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:52,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 08:51:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:52,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:52,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:52,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:52,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:51:52,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:52,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:52,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:52,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 08:51:52,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996356783] [2020-10-28 08:51:52,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:52,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:51:52,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613134347] [2020-10-28 08:51:52,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:51:52,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:51:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:52,967 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 11 states. [2020-10-28 08:51:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:53,308 INFO L93 Difference]: Finished difference Result 196 states and 267 transitions. [2020-10-28 08:51:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:53,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-28 08:51:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:53,309 INFO L225 Difference]: With dead ends: 196 [2020-10-28 08:51:53,309 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 08:51:53,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:51:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 08:51:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2020-10-28 08:51:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 08:51:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 152 transitions. [2020-10-28 08:51:53,323 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 152 transitions. Word has length 55 [2020-10-28 08:51:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:53,323 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 152 transitions. [2020-10-28 08:51:53,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:51:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 152 transitions. [2020-10-28 08:51:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 08:51:53,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:53,324 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:53,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:51:53,324 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash -651621152, now seen corresponding path program 9 times [2020-10-28 08:51:53,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:53,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82017856] [2020-10-28 08:51:53,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:53,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:53,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:54,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:58,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:58,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:58,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:58,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:58,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:58,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:58,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:58,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:58,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:58,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:58,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:58,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:58,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 08:51:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:58,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:58,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:51:58,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:58,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:51:58,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:58,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:51:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 08:51:58,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82017856] [2020-10-28 08:51:58,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:58,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9590069] [2020-10-28 08:51:58,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:58,424 INFO L87 Difference]: Start difference. First operand 114 states and 152 transitions. Second operand 8 states. [2020-10-28 08:51:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:58,608 INFO L93 Difference]: Finished difference Result 216 states and 292 transitions. [2020-10-28 08:51:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:58,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 08:51:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:58,610 INFO L225 Difference]: With dead ends: 216 [2020-10-28 08:51:58,610 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 08:51:58,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 08:51:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-28 08:51:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 08:51:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 154 transitions. [2020-10-28 08:51:58,625 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 154 transitions. Word has length 58 [2020-10-28 08:51:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:58,625 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 154 transitions. [2020-10-28 08:51:58,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 154 transitions. [2020-10-28 08:51:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 08:51:58,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:58,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:58,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:51:58,626 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1105868926, now seen corresponding path program 10 times [2020-10-28 08:51:58,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:58,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134286298] [2020-10-28 08:51:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:58,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:00,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:03,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 08:52:03,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:03,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:52:03,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:03,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:03,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:03,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 08:52:03,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:52:03,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:03,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:03,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:03,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:03,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:03,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:03,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:03,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:03,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:03,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:03,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:03,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 08:52:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:03,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:03,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:03,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:03,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:03,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:03,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:03,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:52:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:52:03,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134286298] [2020-10-28 08:52:03,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:03,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:03,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709019819] [2020-10-28 08:52:03,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:03,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:03,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:03,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:03,855 INFO L87 Difference]: Start difference. First operand 116 states and 154 transitions. Second operand 13 states. [2020-10-28 08:52:05,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:05,539 INFO L93 Difference]: Finished difference Result 697 states and 999 transitions. [2020-10-28 08:52:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:52:05,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-28 08:52:05,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:05,545 INFO L225 Difference]: With dead ends: 697 [2020-10-28 08:52:05,546 INFO L226 Difference]: Without dead ends: 622 [2020-10-28 08:52:05,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:52:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-10-28 08:52:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 128. [2020-10-28 08:52:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 08:52:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2020-10-28 08:52:05,567 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 60 [2020-10-28 08:52:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:05,567 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2020-10-28 08:52:05,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2020-10-28 08:52:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:52:05,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:05,568 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:05,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:52:05,568 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash -87747267, now seen corresponding path program 11 times [2020-10-28 08:52:05,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:05,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736480828] [2020-10-28 08:52:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:05,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:05,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:05,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:10,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 08:52:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:10,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:10,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:10,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:10,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:10,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:10,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:10,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:10,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 08:52:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:10,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:10,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:10,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:10,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:10,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:10,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:10,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:10,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:52:10,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736480828] [2020-10-28 08:52:10,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:10,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570045779] [2020-10-28 08:52:10,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:10,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:10,758 INFO L87 Difference]: Start difference. First operand 128 states and 173 transitions. Second operand 13 states. [2020-10-28 08:52:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:11,144 INFO L93 Difference]: Finished difference Result 222 states and 307 transitions. [2020-10-28 08:52:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:52:11,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-28 08:52:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:11,145 INFO L225 Difference]: With dead ends: 222 [2020-10-28 08:52:11,146 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 08:52:11,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:52:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 08:52:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2020-10-28 08:52:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 08:52:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 177 transitions. [2020-10-28 08:52:11,163 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 177 transitions. Word has length 63 [2020-10-28 08:52:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:11,164 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 177 transitions. [2020-10-28 08:52:11,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 177 transitions. [2020-10-28 08:52:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 08:52:11,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:11,169 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:11,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:52:11,169 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -284448350, now seen corresponding path program 12 times [2020-10-28 08:52:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:11,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485016500] [2020-10-28 08:52:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:11,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:11,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:16,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 08:52:16,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:52:16,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:16,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:52:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:52:16,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 08:52:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:16,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:16,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:16,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:16,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:16,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:16,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:16,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:16,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 08:52:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:16,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:16,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:16,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:16,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:16,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:16,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:16,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:16,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-28 08:52:16,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485016500] [2020-10-28 08:52:16,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:16,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:52:16,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369852273] [2020-10-28 08:52:16,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:52:16,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:16,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:52:16,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:16,318 INFO L87 Difference]: Start difference. First operand 131 states and 177 transitions. Second operand 9 states. [2020-10-28 08:52:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:16,488 INFO L93 Difference]: Finished difference Result 248 states and 340 transitions. [2020-10-28 08:52:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:52:16,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-28 08:52:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:16,490 INFO L225 Difference]: With dead ends: 248 [2020-10-28 08:52:16,490 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:52:16,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:52:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-28 08:52:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 08:52:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 179 transitions. [2020-10-28 08:52:16,503 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 179 transitions. Word has length 66 [2020-10-28 08:52:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:16,503 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 179 transitions. [2020-10-28 08:52:16,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:52:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 179 transitions. [2020-10-28 08:52:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 08:52:16,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:16,504 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:16,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:52:16,505 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1276337596, now seen corresponding path program 13 times [2020-10-28 08:52:16,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:16,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022182347] [2020-10-28 08:52:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:16,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:19,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:21,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:52:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:21,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:21,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:21,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:21,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:21,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:21,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:21,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:21,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 08:52:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:21,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:21,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:21,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:21,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:21,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:21,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:21,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:21,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:21,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:21,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 08:52:21,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022182347] [2020-10-28 08:52:21,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:21,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:21,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266560900] [2020-10-28 08:52:21,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:21,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:21,708 INFO L87 Difference]: Start difference. First operand 133 states and 179 transitions. Second operand 14 states. [2020-10-28 08:52:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:22,104 INFO L93 Difference]: Finished difference Result 227 states and 313 transitions. [2020-10-28 08:52:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:52:22,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-28 08:52:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:22,106 INFO L225 Difference]: With dead ends: 227 [2020-10-28 08:52:22,106 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 08:52:22,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:52:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 08:52:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2020-10-28 08:52:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 08:52:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 183 transitions. [2020-10-28 08:52:22,119 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 183 transitions. Word has length 68 [2020-10-28 08:52:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:22,119 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 183 transitions. [2020-10-28 08:52:22,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 183 transitions. [2020-10-28 08:52:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:52:22,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:22,120 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:22,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:52:22,121 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:22,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1868551365, now seen corresponding path program 14 times [2020-10-28 08:52:22,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:22,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150084440] [2020-10-28 08:52:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:22,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:22,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:27,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:52:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:27,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:27,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:27,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:27,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:27,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 08:52:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:27,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:27,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:27,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:27,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:27,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:27,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:27,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:27,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:27,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:27,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 08:52:27,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150084440] [2020-10-28 08:52:27,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:27,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:52:27,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273862240] [2020-10-28 08:52:27,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:52:27,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:27,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:52:27,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:27,261 INFO L87 Difference]: Start difference. First operand 136 states and 183 transitions. Second operand 10 states. [2020-10-28 08:52:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:27,452 INFO L93 Difference]: Finished difference Result 256 states and 350 transitions. [2020-10-28 08:52:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:52:27,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-28 08:52:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:27,453 INFO L225 Difference]: With dead ends: 256 [2020-10-28 08:52:27,454 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 08:52:27,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 08:52:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-28 08:52:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 08:52:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 185 transitions. [2020-10-28 08:52:27,474 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 185 transitions. Word has length 71 [2020-10-28 08:52:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:27,474 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 185 transitions. [2020-10-28 08:52:27,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:52:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 185 transitions. [2020-10-28 08:52:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:52:27,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:27,475 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:27,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:52:27,476 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash 504055769, now seen corresponding path program 15 times [2020-10-28 08:52:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:27,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111480061] [2020-10-28 08:52:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:27,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:32,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:32,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:52:32,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:32,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:52:32,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:32,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:32,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:32,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 08:52:32,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:52:32,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:32,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:32,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:32,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:32,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:32,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 08:52:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:32,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:32,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:32,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:32,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:32,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:32,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:32,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 08:52:32,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111480061] [2020-10-28 08:52:32,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:32,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962046197] [2020-10-28 08:52:32,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:32,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:32,720 INFO L87 Difference]: Start difference. First operand 138 states and 185 transitions. Second operand 16 states. [2020-10-28 08:52:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:35,204 INFO L93 Difference]: Finished difference Result 893 states and 1285 transitions. [2020-10-28 08:52:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:52:35,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-28 08:52:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:35,215 INFO L225 Difference]: With dead ends: 893 [2020-10-28 08:52:35,215 INFO L226 Difference]: Without dead ends: 809 [2020-10-28 08:52:35,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:52:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-10-28 08:52:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 150. [2020-10-28 08:52:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 08:52:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 204 transitions. [2020-10-28 08:52:35,253 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 204 transitions. Word has length 73 [2020-10-28 08:52:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:35,253 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 204 transitions. [2020-10-28 08:52:35,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 204 transitions. [2020-10-28 08:52:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 08:52:35,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:35,254 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:35,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:52:35,255 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash -720952954, now seen corresponding path program 16 times [2020-10-28 08:52:35,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:35,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093318646] [2020-10-28 08:52:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:35,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:40,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 08:52:40,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:40,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 08:52:40,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:40,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:52:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:52:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:40,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:40,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:40,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:40,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:40,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:40,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:40,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:40,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:40,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:40,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:40,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:40,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 08:52:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:40,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:40,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:40,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:40,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:40,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:40,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 08:52:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093318646] [2020-10-28 08:52:40,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:40,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:40,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615786437] [2020-10-28 08:52:40,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:40,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:40,531 INFO L87 Difference]: Start difference. First operand 150 states and 204 transitions. Second operand 16 states. [2020-10-28 08:52:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:41,078 INFO L93 Difference]: Finished difference Result 253 states and 353 transitions. [2020-10-28 08:52:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:52:41,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-28 08:52:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:41,081 INFO L225 Difference]: With dead ends: 253 [2020-10-28 08:52:41,082 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 08:52:41,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:52:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 08:52:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2020-10-28 08:52:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-28 08:52:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 208 transitions. [2020-10-28 08:52:41,106 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 208 transitions. Word has length 76 [2020-10-28 08:52:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:41,106 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 208 transitions. [2020-10-28 08:52:41,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 208 transitions. [2020-10-28 08:52:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:52:41,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:41,107 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:41,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:52:41,107 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash -618705735, now seen corresponding path program 17 times [2020-10-28 08:52:41,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:41,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394495727] [2020-10-28 08:52:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:41,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:45,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:46,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:52:46,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:46,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5200 [2020-10-28 08:52:46,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:46,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:46,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:52:46,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:46,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:46,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:46,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:46,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:46,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:46,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:46,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:46,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:46,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:46,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 08:52:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:46,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:46,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-10-28 08:52:46,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394495727] [2020-10-28 08:52:46,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:46,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:46,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266234259] [2020-10-28 08:52:46,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:46,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:46,441 INFO L87 Difference]: Start difference. First operand 153 states and 208 transitions. Second operand 11 states. [2020-10-28 08:52:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:46,615 INFO L93 Difference]: Finished difference Result 288 states and 398 transitions. [2020-10-28 08:52:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:46,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-28 08:52:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:46,618 INFO L225 Difference]: With dead ends: 288 [2020-10-28 08:52:46,618 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 08:52:46,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 08:52:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-28 08:52:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 08:52:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 210 transitions. [2020-10-28 08:52:46,632 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 210 transitions. Word has length 79 [2020-10-28 08:52:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:46,633 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 210 transitions. [2020-10-28 08:52:46,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 210 transitions. [2020-10-28 08:52:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:52:46,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:46,634 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:46,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:52:46,634 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash -873796777, now seen corresponding path program 18 times [2020-10-28 08:52:46,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:46,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139092253] [2020-10-28 08:52:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:46,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:51,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:51,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:52:51,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:52:51,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:51,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:52:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 08:52:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 08:52:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:51,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:51,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:51,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:51,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:51,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:51,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:51,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:51,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:51,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:51,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:51,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:51,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 08:52:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:51,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:51,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:52:51,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:51,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:51,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:51,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:51,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:51,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:52:51,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:51,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 08:52:51,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139092253] [2020-10-28 08:52:51,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:51,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:52:51,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533188095] [2020-10-28 08:52:51,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:52:51,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:51,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:52:51,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:51,934 INFO L87 Difference]: Start difference. First operand 155 states and 210 transitions. Second operand 18 states. [2020-10-28 08:52:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:54,825 INFO L93 Difference]: Finished difference Result 997 states and 1437 transitions. [2020-10-28 08:52:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 08:52:54,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-28 08:52:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:54,831 INFO L225 Difference]: With dead ends: 997 [2020-10-28 08:52:54,831 INFO L226 Difference]: Without dead ends: 904 [2020-10-28 08:52:54,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:52:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-28 08:52:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 164. [2020-10-28 08:52:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 08:52:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 224 transitions. [2020-10-28 08:52:54,859 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 224 transitions. Word has length 81 [2020-10-28 08:52:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:54,860 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 224 transitions. [2020-10-28 08:52:54,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:52:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 224 transitions. [2020-10-28 08:52:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 08:52:54,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:54,861 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:54,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:52:54,861 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1323702968, now seen corresponding path program 19 times [2020-10-28 08:52:54,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:54,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672390142] [2020-10-28 08:52:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:59,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:59,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 08:52:59,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:59,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:52:59,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:59,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:59,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:52:59,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:59,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:52:59,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:00,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:00,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:00,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:00,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:00,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:00,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 08:53:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:00,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:00,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 2 proven. 247 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 08:53:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672390142] [2020-10-28 08:53:00,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:00,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:53:00,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073802348] [2020-10-28 08:53:00,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:53:00,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:00,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:53:00,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:00,155 INFO L87 Difference]: Start difference. First operand 164 states and 224 transitions. Second operand 18 states. [2020-10-28 08:53:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:00,666 INFO L93 Difference]: Finished difference Result 273 states and 383 transitions. [2020-10-28 08:53:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:53:00,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-28 08:53:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:00,668 INFO L225 Difference]: With dead ends: 273 [2020-10-28 08:53:00,668 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 08:53:00,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:53:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 08:53:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2020-10-28 08:53:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 08:53:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 228 transitions. [2020-10-28 08:53:00,686 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 228 transitions. Word has length 84 [2020-10-28 08:53:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:00,686 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 228 transitions. [2020-10-28 08:53:00,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:53:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 228 transitions. [2020-10-28 08:53:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 08:53:00,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:00,688 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:00,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:53:00,688 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:00,688 INFO L82 PathProgramCache]: Analyzing trace with hash 113891767, now seen corresponding path program 20 times [2020-10-28 08:53:00,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:00,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195546650] [2020-10-28 08:53:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:53:05,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:05,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:53:05,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:53:05,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:05,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:53:05,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:05,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:05,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:05,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:05,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:05,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 08:53:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:05,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:05,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:53:05,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195546650] [2020-10-28 08:53:05,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:05,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:53:05,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727229857] [2020-10-28 08:53:05,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:53:05,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:05,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:53:05,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:05,871 INFO L87 Difference]: Start difference. First operand 167 states and 228 transitions. Second operand 12 states. [2020-10-28 08:53:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:06,060 INFO L93 Difference]: Finished difference Result 314 states and 436 transitions. [2020-10-28 08:53:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:53:06,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-28 08:53:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:06,066 INFO L225 Difference]: With dead ends: 314 [2020-10-28 08:53:06,066 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 08:53:06,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 08:53:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-28 08:53:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 08:53:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2020-10-28 08:53:06,082 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 87 [2020-10-28 08:53:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:06,082 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2020-10-28 08:53:06,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:53:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2020-10-28 08:53:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:53:06,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:06,084 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:06,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:53:06,084 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:06,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1152124331, now seen corresponding path program 21 times [2020-10-28 08:53:06,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:06,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485347143] [2020-10-28 08:53:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:06,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:53:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:53:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 08:53:11,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:11,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:11,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 08:53:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:11,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:11,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:11,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:11,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:11,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:11,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-28 08:53:11,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485347143] [2020-10-28 08:53:11,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:11,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:53:11,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568518752] [2020-10-28 08:53:11,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:53:11,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:11,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:53:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:53:11,406 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand 19 states. [2020-10-28 08:53:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:12,098 INFO L93 Difference]: Finished difference Result 278 states and 389 transitions. [2020-10-28 08:53:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:53:12,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-28 08:53:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:12,101 INFO L225 Difference]: With dead ends: 278 [2020-10-28 08:53:12,101 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 08:53:12,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:53:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 08:53:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2020-10-28 08:53:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 08:53:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 234 transitions. [2020-10-28 08:53:12,117 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 234 transitions. Word has length 89 [2020-10-28 08:53:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:12,118 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 234 transitions. [2020-10-28 08:53:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:53:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 234 transitions. [2020-10-28 08:53:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 08:53:12,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:12,119 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:12,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:53:12,119 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash 601984394, now seen corresponding path program 22 times [2020-10-28 08:53:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:12,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304903759] [2020-10-28 08:53:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:12,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:12,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:12,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:17,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 08:53:17,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:17,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 08:53:17,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:17,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:17,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:53:17,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:17,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:53:17,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:17,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:17,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:17,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-28 08:53:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:17,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-10-28 08:53:17,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304903759] [2020-10-28 08:53:17,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:17,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:53:17,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187240224] [2020-10-28 08:53:17,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:53:17,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:53:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:17,322 INFO L87 Difference]: Start difference. First operand 172 states and 234 transitions. Second operand 13 states. [2020-10-28 08:53:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:17,513 INFO L93 Difference]: Finished difference Result 322 states and 446 transitions. [2020-10-28 08:53:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:53:17,514 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 92 [2020-10-28 08:53:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:17,515 INFO L225 Difference]: With dead ends: 322 [2020-10-28 08:53:17,515 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 08:53:17,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 08:53:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-28 08:53:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 08:53:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2020-10-28 08:53:17,532 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 92 [2020-10-28 08:53:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:17,533 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2020-10-28 08:53:17,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:53:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2020-10-28 08:53:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 08:53:17,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:17,534 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:17,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:53:17,534 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1581850540, now seen corresponding path program 23 times [2020-10-28 08:53:17,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:17,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422782307] [2020-10-28 08:53:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:17,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 08:53:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:53:22,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:22,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:22,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:22,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:22,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:22,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:22,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:22,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-28 08:53:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:22,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-28 08:53:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422782307] [2020-10-28 08:53:22,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:22,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:53:22,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072547342] [2020-10-28 08:53:22,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:53:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:53:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:22,930 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand 21 states. [2020-10-28 08:53:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:26,400 INFO L93 Difference]: Finished difference Result 1219 states and 1761 transitions. [2020-10-28 08:53:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 08:53:26,401 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-10-28 08:53:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:26,407 INFO L225 Difference]: With dead ends: 1219 [2020-10-28 08:53:26,407 INFO L226 Difference]: Without dead ends: 1120 [2020-10-28 08:53:26,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=939, Invalid=1923, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 08:53:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2020-10-28 08:53:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 186. [2020-10-28 08:53:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 08:53:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2020-10-28 08:53:26,440 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 94 [2020-10-28 08:53:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:26,441 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2020-10-28 08:53:26,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:53:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2020-10-28 08:53:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 08:53:26,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:26,442 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:26,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:53:26,442 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:26,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1312434989, now seen corresponding path program 24 times [2020-10-28 08:53:26,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:26,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449040193] [2020-10-28 08:53:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:26,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:53:31,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:31,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:53:31,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:53:31,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:31,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 08:53:31,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:31,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:31,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:31,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:31,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:31,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:31,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 08:53:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:31,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:31,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:31,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:31,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:31,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:31,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:31,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-28 08:53:31,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449040193] [2020-10-28 08:53:31,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:31,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:53:31,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67559594] [2020-10-28 08:53:31,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:53:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:31,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:53:31,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:31,832 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand 21 states. [2020-10-28 08:53:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:32,612 INFO L93 Difference]: Finished difference Result 304 states and 429 transitions. [2020-10-28 08:53:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:53:32,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-10-28 08:53:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:32,613 INFO L225 Difference]: With dead ends: 304 [2020-10-28 08:53:32,613 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 08:53:32,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:53:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 08:53:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2020-10-28 08:53:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-28 08:53:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 259 transitions. [2020-10-28 08:53:32,632 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 259 transitions. Word has length 97 [2020-10-28 08:53:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:32,632 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 259 transitions. [2020-10-28 08:53:32,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:53:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 259 transitions. [2020-10-28 08:53:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 08:53:32,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:32,634 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:32,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:53:32,634 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 790805068, now seen corresponding path program 25 times [2020-10-28 08:53:32,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:32,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071601654] [2020-10-28 08:53:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:32,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:37,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:37,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 08:53:37,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:37,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:53:37,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:37,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:37,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:53:37,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:37,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:53:37,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:37,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:37,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:37,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:37,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:37,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:37,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:37,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:37,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:37,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:37,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:37,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-28 08:53:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:37,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:37,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:37,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:37,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:37,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:37,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:37,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:37,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-28 08:53:37,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071601654] [2020-10-28 08:53:37,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:37,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:53:37,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552225908] [2020-10-28 08:53:37,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:53:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:53:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:37,838 INFO L87 Difference]: Start difference. First operand 189 states and 259 transitions. Second operand 14 states. [2020-10-28 08:53:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:38,044 INFO L93 Difference]: Finished difference Result 354 states and 494 transitions. [2020-10-28 08:53:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:53:38,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 100 [2020-10-28 08:53:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:38,046 INFO L225 Difference]: With dead ends: 354 [2020-10-28 08:53:38,047 INFO L226 Difference]: Without dead ends: 192 [2020-10-28 08:53:38,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-28 08:53:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-10-28 08:53:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-28 08:53:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 261 transitions. [2020-10-28 08:53:38,071 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 261 transitions. Word has length 100 [2020-10-28 08:53:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:38,071 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 261 transitions. [2020-10-28 08:53:38,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:53:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 261 transitions. [2020-10-28 08:53:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 08:53:38,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:38,072 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:38,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:53:38,072 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash -890303890, now seen corresponding path program 26 times [2020-10-28 08:53:38,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:38,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232331858] [2020-10-28 08:53:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:38,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:53:43,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:53:43,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:53:43,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:43,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:43,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:43,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:43,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-28 08:53:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:43,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:43,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:43,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 2 proven. 425 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-28 08:53:43,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232331858] [2020-10-28 08:53:43,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:43,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:53:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444523035] [2020-10-28 08:53:43,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:53:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:53:43,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:53:43,505 INFO L87 Difference]: Start difference. First operand 191 states and 261 transitions. Second operand 22 states. [2020-10-28 08:53:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:44,255 INFO L93 Difference]: Finished difference Result 309 states and 435 transitions. [2020-10-28 08:53:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:53:44,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-10-28 08:53:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:44,257 INFO L225 Difference]: With dead ends: 309 [2020-10-28 08:53:44,257 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 08:53:44,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 08:53:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 08:53:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 194. [2020-10-28 08:53:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-28 08:53:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2020-10-28 08:53:44,277 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 102 [2020-10-28 08:53:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:44,277 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2020-10-28 08:53:44,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:53:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2020-10-28 08:53:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:53:44,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:44,279 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:44,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:53:44,279 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:44,279 INFO L82 PathProgramCache]: Analyzing trace with hash 834132689, now seen corresponding path program 27 times [2020-10-28 08:53:44,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:44,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050491662] [2020-10-28 08:53:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:44,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:53:49,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:49,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:49,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:49,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:53:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:49,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 08:53:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:49,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:49,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:49,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:49,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-10-28 08:53:49,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050491662] [2020-10-28 08:53:49,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:49,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:53:49,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178594388] [2020-10-28 08:53:49,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:53:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:53:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:49,548 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand 15 states. [2020-10-28 08:53:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:49,769 INFO L93 Difference]: Finished difference Result 362 states and 504 transitions. [2020-10-28 08:53:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:53:49,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 105 [2020-10-28 08:53:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:49,771 INFO L225 Difference]: With dead ends: 362 [2020-10-28 08:53:49,771 INFO L226 Difference]: Without dead ends: 197 [2020-10-28 08:53:49,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-28 08:53:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-10-28 08:53:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 08:53:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 267 transitions. [2020-10-28 08:53:49,791 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 267 transitions. Word has length 105 [2020-10-28 08:53:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:49,791 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 267 transitions. [2020-10-28 08:53:49,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:53:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 267 transitions. [2020-10-28 08:53:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 08:53:49,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:49,793 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:49,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:53:49,793 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash -752726033, now seen corresponding path program 28 times [2020-10-28 08:53:49,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:49,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657488008] [2020-10-28 08:53:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:49,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:54,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:54,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 08:53:54,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-28 08:53:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 2 proven. 477 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 08:53:55,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657488008] [2020-10-28 08:53:55,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:55,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:53:55,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426036769] [2020-10-28 08:53:55,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:53:55,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:53:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:53:55,329 INFO L87 Difference]: Start difference. First operand 196 states and 267 transitions. Second operand 24 states. [2020-10-28 08:53:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:59,699 INFO L93 Difference]: Finished difference Result 1415 states and 2047 transitions. [2020-10-28 08:53:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 08:53:59,699 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 107 [2020-10-28 08:53:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:59,704 INFO L225 Difference]: With dead ends: 1415 [2020-10-28 08:53:59,704 INFO L226 Difference]: Without dead ends: 1307 [2020-10-28 08:53:59,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1284, Invalid=2622, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 08:53:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-10-28 08:53:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 208. [2020-10-28 08:53:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 08:53:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 286 transitions. [2020-10-28 08:53:59,742 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 286 transitions. Word has length 107 [2020-10-28 08:53:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:59,742 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 286 transitions. [2020-10-28 08:53:59,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:53:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 286 transitions. [2020-10-28 08:53:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 08:53:59,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:59,743 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:59,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:53:59,744 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:59,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2017270192, now seen corresponding path program 29 times [2020-10-28 08:53:59,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:59,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64477644] [2020-10-28 08:53:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:59,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:59,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:04,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 08:54:04,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:05,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:05,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:05,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:05,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:05,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-28 08:54:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:05,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:05,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:05,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:05,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:05,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:05,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:05,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:05,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:05,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 532 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 08:54:05,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64477644] [2020-10-28 08:54:05,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:05,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:54:05,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180937414] [2020-10-28 08:54:05,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:54:05,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:05,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:54:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:54:05,193 INFO L87 Difference]: Start difference. First operand 208 states and 286 transitions. Second operand 24 states. [2020-10-28 08:54:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:06,093 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2020-10-28 08:54:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:54:06,094 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2020-10-28 08:54:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:06,096 INFO L225 Difference]: With dead ends: 335 [2020-10-28 08:54:06,096 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 08:54:06,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 08:54:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 08:54:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2020-10-28 08:54:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-28 08:54:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 290 transitions. [2020-10-28 08:54:06,115 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 290 transitions. Word has length 110 [2020-10-28 08:54:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:06,115 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 290 transitions. [2020-10-28 08:54:06,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:54:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 290 transitions. [2020-10-28 08:54:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:54:06,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:06,116 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:06,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:54:06,116 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:06,116 INFO L82 PathProgramCache]: Analyzing trace with hash -526816177, now seen corresponding path program 30 times [2020-10-28 08:54:06,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:06,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225219326] [2020-10-28 08:54:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:06,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:08,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:11,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:54:11,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:11,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:54:11,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:11,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:54:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:11,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:54:11,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:11,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:11,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:11,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:11,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:11,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:11,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:11,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:11,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:11,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-28 08:54:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:11,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:11,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-10-28 08:54:11,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225219326] [2020-10-28 08:54:11,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:11,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:54:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791984268] [2020-10-28 08:54:11,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:54:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:11,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:54:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:11,345 INFO L87 Difference]: Start difference. First operand 211 states and 290 transitions. Second operand 16 states. [2020-10-28 08:54:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:11,527 INFO L93 Difference]: Finished difference Result 394 states and 552 transitions. [2020-10-28 08:54:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:54:11,527 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2020-10-28 08:54:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:11,529 INFO L225 Difference]: With dead ends: 394 [2020-10-28 08:54:11,529 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 08:54:11,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 08:54:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2020-10-28 08:54:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 08:54:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 292 transitions. [2020-10-28 08:54:11,549 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 292 transitions. Word has length 113 [2020-10-28 08:54:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:11,550 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 292 transitions. [2020-10-28 08:54:11,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:54:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 292 transitions. [2020-10-28 08:54:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:54:11,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:11,551 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:11,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:54:11,551 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash 516154221, now seen corresponding path program 31 times [2020-10-28 08:54:11,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:11,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800650101] [2020-10-28 08:54:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:13,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:16,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:16,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:54:16,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:16,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 08:54:16,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:16,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:16,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:54:16,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 08:54:16,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 08:54:16,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:17,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:17,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:17,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:17,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:17,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:17,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:17,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:17,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:17,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:17,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:17,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 08:54:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:17,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:17,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 2 proven. 590 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-28 08:54:17,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800650101] [2020-10-28 08:54:17,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:17,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:54:17,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454138558] [2020-10-28 08:54:17,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:54:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:54:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:17,105 INFO L87 Difference]: Start difference. First operand 213 states and 292 transitions. Second operand 26 states. [2020-10-28 08:54:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:22,201 INFO L93 Difference]: Finished difference Result 1519 states and 2199 transitions. [2020-10-28 08:54:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-28 08:54:22,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 115 [2020-10-28 08:54:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:22,207 INFO L225 Difference]: With dead ends: 1519 [2020-10-28 08:54:22,207 INFO L226 Difference]: Without dead ends: 1402 [2020-10-28 08:54:22,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1544, Invalid=3148, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 08:54:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2020-10-28 08:54:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 222. [2020-10-28 08:54:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 08:54:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 306 transitions. [2020-10-28 08:54:22,250 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 306 transitions. Word has length 115 [2020-10-28 08:54:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:22,250 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 306 transitions. [2020-10-28 08:54:22,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:54:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 306 transitions. [2020-10-28 08:54:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 08:54:22,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:22,251 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:22,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:54:22,252 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1073222286, now seen corresponding path program 32 times [2020-10-28 08:54:22,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:22,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751024597] [2020-10-28 08:54:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:22,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:27,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 08:54:27,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:27,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:27,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:27,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:27,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:27,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:27,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:27,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:27,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:27,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:27,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-10-28 08:54:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:27,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:27,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:27,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:27,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:27,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 08:54:27,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:27,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:27,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 2 proven. 651 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-28 08:54:27,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751024597] [2020-10-28 08:54:27,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:27,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:54:27,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373100144] [2020-10-28 08:54:27,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:54:27,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:54:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:27,831 INFO L87 Difference]: Start difference. First operand 222 states and 306 transitions. Second operand 26 states. [2020-10-28 08:54:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:28,714 INFO L93 Difference]: Finished difference Result 355 states and 505 transitions. [2020-10-28 08:54:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:54:28,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-10-28 08:54:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:28,717 INFO L225 Difference]: With dead ends: 355 [2020-10-28 08:54:28,717 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 08:54:28,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 08:54:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 08:54:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2020-10-28 08:54:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-28 08:54:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 310 transitions. [2020-10-28 08:54:28,742 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 310 transitions. Word has length 118 [2020-10-28 08:54:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:28,742 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 310 transitions. [2020-10-28 08:54:28,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:54:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 310 transitions. [2020-10-28 08:54:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 08:54:28,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:28,743 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:28,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:54:28,744 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1825696077, now seen corresponding path program 33 times [2020-10-28 08:54:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:28,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410026713] [2020-10-28 08:54:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:28,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:30,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:33,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:54:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:33,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:33,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:33,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:33,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:33,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 08:54:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:33,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:34,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:34,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:34,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:34,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:34,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:34,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2020-10-28 08:54:34,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410026713] [2020-10-28 08:54:34,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:34,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:54:34,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398911176] [2020-10-28 08:54:34,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:54:34,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:34,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:54:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:34,016 INFO L87 Difference]: Start difference. First operand 225 states and 310 transitions. Second operand 17 states. [2020-10-28 08:54:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:34,274 INFO L93 Difference]: Finished difference Result 420 states and 590 transitions. [2020-10-28 08:54:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:54:34,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-10-28 08:54:34,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:34,277 INFO L225 Difference]: With dead ends: 420 [2020-10-28 08:54:34,277 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 08:54:34,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 08:54:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2020-10-28 08:54:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 08:54:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 312 transitions. [2020-10-28 08:54:34,295 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 312 transitions. Word has length 121 [2020-10-28 08:54:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:34,296 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 312 transitions. [2020-10-28 08:54:34,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:54:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 312 transitions. [2020-10-28 08:54:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 08:54:34,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:34,298 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:34,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:54:34,298 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:34,298 INFO L82 PathProgramCache]: Analyzing trace with hash 278553195, now seen corresponding path program 34 times [2020-10-28 08:54:34,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:34,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972122182] [2020-10-28 08:54:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:34,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:39,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:39,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 08:54:39,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:39,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 08:54:39,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:39,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:54:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:54:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 08:54:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:39,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:39,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:39,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:39,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:39,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:39,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-28 08:54:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:39,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:39,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:39,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:39,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:39,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:39,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 08:54:39,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972122182] [2020-10-28 08:54:39,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:39,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:54:39,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280874486] [2020-10-28 08:54:39,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:54:39,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:54:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:54:39,902 INFO L87 Difference]: Start difference. First operand 227 states and 312 transitions. Second operand 27 states. [2020-10-28 08:54:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:41,051 INFO L93 Difference]: Finished difference Result 360 states and 511 transitions. [2020-10-28 08:54:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:54:41,052 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2020-10-28 08:54:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:41,054 INFO L225 Difference]: With dead ends: 360 [2020-10-28 08:54:41,054 INFO L226 Difference]: Without dead ends: 237 [2020-10-28 08:54:41,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 08:54:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-28 08:54:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2020-10-28 08:54:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 08:54:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 316 transitions. [2020-10-28 08:54:41,080 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 316 transitions. Word has length 123 [2020-10-28 08:54:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:41,080 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 316 transitions. [2020-10-28 08:54:41,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:54:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 316 transitions. [2020-10-28 08:54:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 08:54:41,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:41,082 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:41,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:54:41,082 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1339284044, now seen corresponding path program 35 times [2020-10-28 08:54:41,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:41,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39825181] [2020-10-28 08:54:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:43,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:46,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5345 [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:54:46,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:46,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:46,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:46,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:46,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:46,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:46,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:46,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:46,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:46,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:46,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:46,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:46,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-28 08:54:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:46,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:46,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 08:54:46,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:46,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:46,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:46,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:46,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:46,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 08:54:46,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:46,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-28 08:54:46,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39825181] [2020-10-28 08:54:46,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:46,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:54:46,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603473614] [2020-10-28 08:54:46,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:54:46,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:46,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:54:46,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:54:46,771 INFO L87 Difference]: Start difference. First operand 230 states and 316 transitions. Second operand 18 states. [2020-10-28 08:54:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:46,998 INFO L93 Difference]: Finished difference Result 428 states and 600 transitions. [2020-10-28 08:54:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:54:46,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 126 [2020-10-28 08:54:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:47,001 INFO L225 Difference]: With dead ends: 428 [2020-10-28 08:54:47,001 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 08:54:47,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:54:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 08:54:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-28 08:54:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 08:54:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 318 transitions. [2020-10-28 08:54:47,029 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 318 transitions. Word has length 126 [2020-10-28 08:54:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:47,029 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 318 transitions. [2020-10-28 08:54:47,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:54:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 318 transitions. [2020-10-28 08:54:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 08:54:47,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:47,030 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:47,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:54:47,030 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:47,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:47,031 INFO L82 PathProgramCache]: Analyzing trace with hash -688345258, now seen corresponding path program 36 times [2020-10-28 08:54:47,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:47,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370940519] [2020-10-28 08:54:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:49,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking...