/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loops-crafted-1/vnew1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:56:36,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:56:36,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:56:36,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:56:36,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:56:36,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:56:36,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:56:36,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:56:36,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:56:36,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:56:36,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:56:36,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:56:36,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:56:36,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:56:36,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:56:36,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:56:36,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:56:36,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:56:36,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:56:36,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:56:36,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:56:36,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:56:36,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:56:36,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:56:36,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:56:36,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:56:36,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:56:36,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:56:36,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:56:36,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:56:36,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:56:36,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:56:36,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:56:36,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:56:36,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:56:36,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:56:36,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:56:36,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:56:36,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:56:36,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:56:36,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:56:36,971 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 [2020-10-29 09:56:36,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:56:37,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:56:37,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:56:37,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:56:37,002 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:56:37,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:56:37,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:56:37,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:56:37,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:56:37,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:56:37,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:56:37,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:56:37,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:56:37,004 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:56:37,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:56:37,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:56:37,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:56:37,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:56:37,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:56:37,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:56:37,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:56:37,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:56:37,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:56:37,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:56:37,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:56:37,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:56:37,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:56:37,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:56:37,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:56:37,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:56:37,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:56:37,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:56:37,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:56:37,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:56:37,518 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:56:37,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/vnew1.c [2020-10-29 09:56:37,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b806663/9f48f76f7017457a96f9fdf3819a99e0/FLAG1cfa8fa26 [2020-10-29 09:56:38,233 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:56:38,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/vnew1.c [2020-10-29 09:56:38,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b806663/9f48f76f7017457a96f9fdf3819a99e0/FLAG1cfa8fa26 [2020-10-29 09:56:38,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9b806663/9f48f76f7017457a96f9fdf3819a99e0 [2020-10-29 09:56:38,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:56:38,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:56:38,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:56:38,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:56:38,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:56:38,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55717b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38, skipping insertion in model container [2020-10-29 09:56:38,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:56:38,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:56:38,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:56:38,813 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:56:38,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:56:38,849 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:56:38,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38 WrapperNode [2020-10-29 09:56:38,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:56:38,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:56:38,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:56:38,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:56:38,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (1/1) ... [2020-10-29 09:56:38,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:56:38,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:56:38,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:56:38,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:56:38,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (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 [2020-10-29 09:56:38,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:56:38,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:56:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:56:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:56:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 09:56:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:56:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:56:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:56:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:56:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:56:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:56:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:56:39,321 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:56:39,321 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:56:39,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:56:39 BoogieIcfgContainer [2020-10-29 09:56:39,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:56:39,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:56:39,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:56:39,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:56:39,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:56:38" (1/3) ... [2020-10-29 09:56:39,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73178a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:56:39, skipping insertion in model container [2020-10-29 09:56:39,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:56:38" (2/3) ... [2020-10-29 09:56:39,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73178a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:56:39, skipping insertion in model container [2020-10-29 09:56:39,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:56:39" (3/3) ... [2020-10-29 09:56:39,364 INFO L111 eAbstractionObserver]: Analyzing ICFG vnew1.c [2020-10-29 09:56:39,378 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:56:39,383 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:56:39,398 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:56:39,430 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:56:39,431 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:56:39,431 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:56:39,431 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:56:39,431 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:56:39,431 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:56:39,432 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:56:39,432 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:56:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-29 09:56:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:56:39,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:39,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:39,461 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1893499074, now seen corresponding path program 1 times [2020-10-29 09:56:39,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:39,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287926271] [2020-10-29 09:56:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:40,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:40,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:40,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:56:40,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:40,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-29 09:56:40,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:40,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:56:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:56:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:56:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:56:40,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:40,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:40,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:40,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:40,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:40,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:56:40,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:40,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:40,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:40,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:40,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:40,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:40,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287926271] [2020-10-29 09:56:40,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:56:40,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:56:40,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137735919] [2020-10-29 09:56:40,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:56:40,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:56:40,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:56:40,781 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-29 09:56:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:41,467 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2020-10-29 09:56:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:56:41,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-29 09:56:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:41,477 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:56:41,478 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:56:41,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:56:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:56:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-29 09:56:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:56:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-29 09:56:41,582 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2020-10-29 09:56:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:41,584 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-29 09:56:41,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:56:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-29 09:56:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:56:41,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:41,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:41,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:56:41,586 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:41,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1602387218, now seen corresponding path program 1 times [2020-10-29 09:56:41,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:41,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292828933] [2020-10-29 09:56:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:41,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:41,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:41,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:56:41,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:41,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-29 09:56:41,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:41,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:56:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:56:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:56:41,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:42,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:42,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:42,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:42,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:42,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:42,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:56:42,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:42,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:42,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:42,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:42,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:56:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292828933] [2020-10-29 09:56:42,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:42,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:56:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013831468] [2020-10-29 09:56:42,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:56:42,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:42,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:56:42,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:56:42,406 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-29 09:56:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:43,101 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-29 09:56:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:56:43,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-29 09:56:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:43,103 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:56:43,104 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:56:43,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:56:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:56:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-29 09:56:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:56:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-29 09:56:43,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 16 [2020-10-29 09:56:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:43,120 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-29 09:56:43,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:56:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-29 09:56:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:56:43,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:43,122 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:43,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:56:43,122 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1167854274, now seen corresponding path program 2 times [2020-10-29 09:56:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:43,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198215245] [2020-10-29 09:56:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:43,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:43,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:56:43,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:43,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-29 09:56:43,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:43,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:43,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:56:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:56:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:56:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:43,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:43,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:43,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:43,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:43,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:56:43,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:43,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:43,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:43,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:43,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198215245] [2020-10-29 09:56:43,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:43,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:56:43,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638134461] [2020-10-29 09:56:43,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:56:43,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:43,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:56:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:56:43,593 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-10-29 09:56:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:44,162 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-29 09:56:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:56:44,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-29 09:56:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:44,167 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:56:44,168 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:56:44,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:56:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:56:44,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-10-29 09:56:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:56:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-29 09:56:44,184 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 17 [2020-10-29 09:56:44,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:44,185 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-29 09:56:44,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:56:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-29 09:56:44,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:56:44,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:44,192 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:44,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:56:44,192 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash 582234898, now seen corresponding path program 3 times [2020-10-29 09:56:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:44,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589117495] [2020-10-29 09:56:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:44,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:44,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:44,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:56:44,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:44,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-29 09:56:44,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:44,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:44,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:56:44,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:56:44,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:56:44,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:44,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:44,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:44,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:44,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:44,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:56:44,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:44,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:44,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:44,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589117495] [2020-10-29 09:56:44,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:44,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:56:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375384943] [2020-10-29 09:56:44,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:56:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:56:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:56:44,670 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2020-10-29 09:56:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:47,435 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-29 09:56:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:56:47,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-29 09:56:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:47,438 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:56:47,438 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:56:47,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:56:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:56:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-29 09:56:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:56:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-29 09:56:47,457 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 18 [2020-10-29 09:56:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:47,457 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-29 09:56:47,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:56:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-29 09:56:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:56:47,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:47,459 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:47,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:56:47,459 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash -392096574, now seen corresponding path program 4 times [2020-10-29 09:56:47,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:47,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54530775] [2020-10-29 09:56:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:47,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:47,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:47,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:56:47,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:47,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-29 09:56:47,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:47,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:47,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:56:47,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:56:47,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:56:47,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:48,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:48,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:48,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:48,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:56:48,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:48,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54530775] [2020-10-29 09:56:48,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:48,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:56:48,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76536681] [2020-10-29 09:56:48,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:56:48,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:56:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:56:48,055 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 10 states. [2020-10-29 09:56:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:53,046 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-29 09:56:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:56:53,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-29 09:56:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:53,049 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:56:53,049 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:56:53,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:56:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:56:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-10-29 09:56:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:56:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-29 09:56:53,079 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 19 [2020-10-29 09:56:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:53,095 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-29 09:56:53,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:56:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-29 09:56:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:56:53,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:53,098 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:53,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:56:53,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash -531601134, now seen corresponding path program 5 times [2020-10-29 09:56:53,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:53,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848621801] [2020-10-29 09:56:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:53,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:53,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:56:53,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:53,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-29 09:56:53,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:53,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:53,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:56:53,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:56:53,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:56:53,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:53,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:53,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:53,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:53,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:53,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:53,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:56:53,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:53,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:53,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:53,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:56:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:53,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848621801] [2020-10-29 09:56:53,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:53,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:56:53,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561140505] [2020-10-29 09:56:53,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:56:53,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:56:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:56:53,795 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2020-10-29 09:57:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:01,219 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-10-29 09:57:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:57:01,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:57:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:01,222 INFO L225 Difference]: With dead ends: 77 [2020-10-29 09:57:01,222 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:57:01,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:57:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:57:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 40. [2020-10-29 09:57:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:57:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:57:01,239 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 20 [2020-10-29 09:57:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:01,240 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:57:01,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:57:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:57:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:57:01,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:01,241 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:01,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:57:01,241 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash -561275198, now seen corresponding path program 6 times [2020-10-29 09:57:01,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:01,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627837656] [2020-10-29 09:57:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:01,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:01,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:57:01,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:01,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-29 09:57:01,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:01,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:57:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:57:01,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:02,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:02,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:57:02,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:02,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:02,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:02,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:57:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:02,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627837656] [2020-10-29 09:57:02,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:02,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:57:02,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171217512] [2020-10-29 09:57:02,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:57:02,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:02,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:57:02,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:57:02,076 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 12 states. [2020-10-29 09:57:07,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:07,549 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-10-29 09:57:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:57:07,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-29 09:57:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:07,552 INFO L225 Difference]: With dead ends: 77 [2020-10-29 09:57:07,553 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:57:07,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=65, Invalid=354, Unknown=1, NotChecked=0, Total=420 [2020-10-29 09:57:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:57:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2020-10-29 09:57:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:57:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-29 09:57:07,589 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 21 [2020-10-29 09:57:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:07,589 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-29 09:57:07,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:57:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-29 09:57:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:57:07,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:07,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:07,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:57:07,592 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash -54620541, now seen corresponding path program 1 times [2020-10-29 09:57:07,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:07,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084849290] [2020-10-29 09:57:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:07,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:07,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:08,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:08,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:57:08,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:57:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-29 09:57:08,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:08,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:57:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:57:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:08,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:08,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:08,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:08,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:08,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:57:08,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:08,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:08,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:08,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:08,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:57:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:08,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:08,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:08,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:57:08,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:08,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:57:08,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:08,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:08,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:57:08,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:08,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:57:08,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:08,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084849290] [2020-10-29 09:57:08,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:08,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:57:08,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682418952] [2020-10-29 09:57:08,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:57:08,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:57:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:57:08,690 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 8 states. [2020-10-29 09:57:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:09,307 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-29 09:57:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:57:09,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 09:57:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:09,310 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:57:09,310 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:57:09,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:57:09,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:57:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:57:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:57:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-29 09:57:09,346 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 23 [2020-10-29 09:57:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:09,346 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-29 09:57:09,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:57:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-29 09:57:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:57:09,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:09,349 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:09,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:57:09,349 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:09,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1481171182, now seen corresponding path program 7 times [2020-10-29 09:57:09,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:09,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634786288] [2020-10-29 09:57:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:09,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:09,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:57:09,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-29 09:57:09,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:09,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:57:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:57:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:10,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:10,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:10,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:10,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:10,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:57:10,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:10,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:10,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:10,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634786288] [2020-10-29 09:57:10,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:10,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:57:10,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078723947] [2020-10-29 09:57:10,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:57:10,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:57:10,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:57:10,106 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 13 states. [2020-10-29 09:57:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:11,356 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-10-29 09:57:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:57:11,356 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-29 09:57:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:11,358 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:57:11,358 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:57:11,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:57:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:57:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-29 09:57:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:57:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-29 09:57:11,378 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 22 [2020-10-29 09:57:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:11,379 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-29 09:57:11,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:57:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-29 09:57:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:57:11,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:11,380 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:11,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:57:11,380 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash 66824386, now seen corresponding path program 8 times [2020-10-29 09:57:11,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:11,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724895259] [2020-10-29 09:57:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:11,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:11,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:11,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:57:11,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-29 09:57:11,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:11,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:57:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:11,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:57:11,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:12,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:12,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:12,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:12,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:12,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:12,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:57:12,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:12,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:12,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:12,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:12,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:12,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:12,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724895259] [2020-10-29 09:57:12,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:12,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:57:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549339546] [2020-10-29 09:57:12,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:57:12,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:57:12,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:57:12,300 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 14 states. [2020-10-29 09:57:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:22,677 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-29 09:57:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:57:22,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-29 09:57:22,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:22,680 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:57:22,680 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:57:22,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=71, Invalid=528, Unknown=1, NotChecked=0, Total=600 [2020-10-29 09:57:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:57:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-10-29 09:57:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:57:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-29 09:57:22,701 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 23 [2020-10-29 09:57:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:22,701 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-29 09:57:22,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:57:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-29 09:57:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:57:22,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:22,703 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:22,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:57:22,703 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2041309053, now seen corresponding path program 2 times [2020-10-29 09:57:22,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:22,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469242503] [2020-10-29 09:57:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:22,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:22,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:57:22,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:22,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-29 09:57:22,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:22,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:57:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:22,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:57:22,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:23,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:23,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:23,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:23,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:23,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:23,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:57:23,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:23,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:23,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:23,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:23,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-29 09:57:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:23,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:23,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:23,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:57:23,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:23,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:57:23,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:23,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:57:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:57:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:23,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469242503] [2020-10-29 09:57:23,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:23,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:57:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020071547] [2020-10-29 09:57:23,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:57:23,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:57:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:57:23,221 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 10 states. [2020-10-29 09:57:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:23,925 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-10-29 09:57:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:57:23,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-29 09:57:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:23,927 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:57:23,927 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:57:23,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:57:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:57:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-29 09:57:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:57:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-29 09:57:23,951 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 25 [2020-10-29 09:57:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:23,952 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-29 09:57:23,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:57:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-29 09:57:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:57:23,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:23,953 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:23,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:57:23,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash 810046738, now seen corresponding path program 9 times [2020-10-29 09:57:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69186192] [2020-10-29 09:57:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:24,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:24,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:24,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:57:24,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:24,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-29 09:57:24,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:24,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:24,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:57:24,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:24,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:57:24,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:24,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:24,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:24,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:24,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:24,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:24,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:57:24,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:24,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:24,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:24,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:24,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:24,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:24,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69186192] [2020-10-29 09:57:24,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:24,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:57:24,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983712652] [2020-10-29 09:57:24,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:57:24,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:24,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:57:24,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:57:24,935 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 15 states. [2020-10-29 09:57:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:30,797 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-10-29 09:57:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:57:30,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:57:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:30,799 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:57:30,799 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:57:30,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:57:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:57:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-29 09:57:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:57:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-29 09:57:30,829 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 24 [2020-10-29 09:57:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:30,831 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-29 09:57:30,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:57:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-29 09:57:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:57:30,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:30,837 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:30,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:57:30,838 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:30,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:30,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1919864126, now seen corresponding path program 10 times [2020-10-29 09:57:30,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:30,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743250618] [2020-10-29 09:57:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:30,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:31,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:31,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:57:31,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:31,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-29 09:57:31,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:31,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:57:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:57:31,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:32,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:32,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:32,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:32,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:32,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:32,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:57:32,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:32,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:32,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:32,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:32,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:32,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:32,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743250618] [2020-10-29 09:57:32,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:32,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:57:32,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832985442] [2020-10-29 09:57:32,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:57:32,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:57:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:57:32,727 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 16 states. [2020-10-29 09:57:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:57:53,582 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2020-10-29 09:57:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:57:53,583 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:57:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:57:53,585 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:57:53,585 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:57:53,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:57:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:57:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2020-10-29 09:57:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:57:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-10-29 09:57:53,622 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 25 [2020-10-29 09:57:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:57:53,622 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-10-29 09:57:53,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:57:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-10-29 09:57:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:57:53,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:57:53,624 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:57:53,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:57:53,624 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:57:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:57:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash -647754990, now seen corresponding path program 11 times [2020-10-29 09:57:53,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:57:53,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406920104] [2020-10-29 09:57:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:57:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:53,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:54,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:54,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:57:54,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:54,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-29 09:57:54,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:54,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:57:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:57:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:57:54,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:54,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:57:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:57:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:57:54,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:57:54,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:57:54,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:57:54,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:57:54,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:57:54,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:57:54,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:57:54,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:57:54,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:57:54,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:57:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:57:54,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406920104] [2020-10-29 09:57:54,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:57:54,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:57:54,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716266509] [2020-10-29 09:57:54,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:57:54,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:57:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:57:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:57:54,733 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 17 states. [2020-10-29 09:58:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:01,095 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-10-29 09:58:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:58:01,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:58:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:01,097 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:58:01,098 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 09:58:01,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:58:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 09:58:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 98. [2020-10-29 09:58:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:58:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2020-10-29 09:58:01,130 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 26 [2020-10-29 09:58:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:01,130 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2020-10-29 09:58:01,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:58:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2020-10-29 09:58:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:58:01,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:01,131 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:58:01,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:58:01,131 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1557322029, now seen corresponding path program 3 times [2020-10-29 09:58:01,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:01,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621104247] [2020-10-29 09:58:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:01,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:01,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:01,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:58:01,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:01,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-29 09:58:01,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:01,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:01,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:58:01,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:58:01,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:58:01,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:01,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:01,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:01,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:01,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:58:01,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:01,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:01,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 09:58:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:01,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:01,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:01,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:58:01,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:01,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:58:01,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:01,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:58:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:58:01,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:58:01,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621104247] [2020-10-29 09:58:01,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:01,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:58:01,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053388511] [2020-10-29 09:58:01,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:58:01,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:58:01,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:58:01,958 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand 13 states. [2020-10-29 09:58:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:07,290 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2020-10-29 09:58:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:58:07,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-29 09:58:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:07,293 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:58:07,293 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:58:07,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:58:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:58:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2020-10-29 09:58:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 09:58:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2020-10-29 09:58:07,324 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 28 [2020-10-29 09:58:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:07,325 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2020-10-29 09:58:07,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:58:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2020-10-29 09:58:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:58:07,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:07,326 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:58:07,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:58:07,326 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:07,327 INFO L82 PathProgramCache]: Analyzing trace with hash 132922562, now seen corresponding path program 12 times [2020-10-29 09:58:07,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:07,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623746565] [2020-10-29 09:58:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:07,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:08,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:08,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:58:08,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:08,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-29 09:58:08,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:08,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:58:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:58:08,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:58:08,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:08,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:08,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:08,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:08,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:58:08,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:08,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:58:08,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623746565] [2020-10-29 09:58:08,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:08,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:58:08,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835158501] [2020-10-29 09:58:08,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:58:08,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:08,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:58:08,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:58:08,823 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand 18 states. [2020-10-29 09:58:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:41,038 INFO L93 Difference]: Finished difference Result 141 states and 165 transitions. [2020-10-29 09:58:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:58:41,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:58:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:41,041 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:58:41,041 INFO L226 Difference]: Without dead ends: 138 [2020-10-29 09:58:41,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=100, Invalid=1021, Unknown=1, NotChecked=0, Total=1122 [2020-10-29 09:58:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-29 09:58:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2020-10-29 09:58:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:58:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-10-29 09:58:41,073 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 27 [2020-10-29 09:58:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:41,073 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-10-29 09:58:41,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:58:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-10-29 09:58:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:58:41,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:41,074 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:58:41,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:58:41,075 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1435877102, now seen corresponding path program 13 times [2020-10-29 09:58:41,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:41,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885422470] [2020-10-29 09:58:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:42,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:42,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:58:42,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:42,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 945 [2020-10-29 09:58:42,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:42,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:42,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:58:42,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:58:42,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:58:42,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:42,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:42,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:42,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:42,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:42,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:58:42,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:42,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:42,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:42,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:58:42,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885422470] [2020-10-29 09:58:42,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:42,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:58:42,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816548204] [2020-10-29 09:58:42,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:58:42,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:42,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:58:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:58:42,683 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 19 states. [2020-10-29 09:58:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:51,798 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2020-10-29 09:58:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:58:51,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:58:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:51,802 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:58:51,802 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:58:51,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:58:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:58:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-29 09:58:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:58:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2020-10-29 09:58:51,833 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 28 [2020-10-29 09:58:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:51,833 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2020-10-29 09:58:51,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:58:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2020-10-29 09:58:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:58:51,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:51,835 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] [2020-10-29 09:58:51,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:58:51,835 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:51,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2031748514, now seen corresponding path program 4 times [2020-10-29 09:58:51,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:51,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739458641] [2020-10-29 09:58:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:51,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:52,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:52,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:53,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:53,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1655 [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:58:53,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:53,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:53,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:53,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-29 09:58:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:54,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:54,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:54,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:58:54,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:54,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:58:54,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:54,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:58:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:54,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:58:54,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:54,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 09:58:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:54,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:54,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:54,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:58:54,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:54,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:58:54,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:54,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:54,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:58:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:58:54,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:58:54,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739458641] [2020-10-29 09:58:54,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:54,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:58:54,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224624699] [2020-10-29 09:58:54,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:58:54,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:58:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:58:54,038 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 10 states. [2020-10-29 09:58:56,616 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-29 09:58:56,942 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-29 09:58:57,191 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-29 09:58:57,871 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-29 09:58:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:58:57,903 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-29 09:58:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:58:57,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-29 09:58:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:58:57,905 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:58:57,905 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:58:57,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2020-10-29 09:58:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:58:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-29 09:58:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:58:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-10-29 09:58:57,937 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 31 [2020-10-29 09:58:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:58:57,938 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-10-29 09:58:57,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:58:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-10-29 09:58:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:58:57,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:58:57,939 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:58:57,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:58:57,939 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:58:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:58:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1470940866, now seen corresponding path program 14 times [2020-10-29 09:58:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:58:57,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488172380] [2020-10-29 09:58:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:58:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:58,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:58,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:58,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:58:58,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-29 09:58:58,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:58,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:58:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:58:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:58:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:59,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:58:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:58:59,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:58:59,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:58:59,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:58:59,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:58:59,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:58:59,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:58:59,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:58:59,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:58:59,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:58:59,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:58:59,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:58:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:58:59,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488172380] [2020-10-29 09:58:59,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:58:59,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:58:59,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659652046] [2020-10-29 09:58:59,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:58:59,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:58:59,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:58:59,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:58:59,678 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 20 states. [2020-10-29 09:59:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:19,390 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2020-10-29 09:59:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:59:19,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:59:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:19,392 INFO L225 Difference]: With dead ends: 145 [2020-10-29 09:59:19,392 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 09:59:19,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:59:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 09:59:19,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 116. [2020-10-29 09:59:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-29 09:59:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-10-29 09:59:19,423 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 29 [2020-10-29 09:59:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-10-29 09:59:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:59:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-10-29 09:59:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:59:19,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:19,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:19,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:59:19,425 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -379756046, now seen corresponding path program 5 times [2020-10-29 09:59:19,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:19,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649370993] [2020-10-29 09:59:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:19,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:19,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:19,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:59:19,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:19,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-29 09:59:19,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:19,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:59:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:59:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:59:19,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:20,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:20,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:20,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:20,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:20,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:59:20,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:20,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:20,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:20,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-29 09:59:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:20,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:20,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:20,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:59:20,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:20,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:59:20,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:20,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:20,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:59:20,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:20,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:59:20,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:20,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-29 09:59:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:20,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:20,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:20,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:59:20,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:59:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649370993] [2020-10-29 09:59:20,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:20,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:59:20,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249219669] [2020-10-29 09:59:20,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:59:20,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:20,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:59:20,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:59:20,059 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 11 states. [2020-10-29 09:59:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:20,862 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2020-10-29 09:59:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:59:20,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:59:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:20,867 INFO L225 Difference]: With dead ends: 149 [2020-10-29 09:59:20,867 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 09:59:20,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:59:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 09:59:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 123. [2020-10-29 09:59:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:59:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2020-10-29 09:59:20,910 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 32 [2020-10-29 09:59:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:20,910 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2020-10-29 09:59:20,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:59:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2020-10-29 09:59:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:59:20,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:20,911 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:20,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:59:20,912 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1387984658, now seen corresponding path program 15 times [2020-10-29 09:59:20,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:20,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517503665] [2020-10-29 09:59:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:20,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:21,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:21,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:59:21,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:21,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-29 09:59:21,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:21,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:59:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:59:21,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:59:21,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:22,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:22,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:22,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:22,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:22,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:59:22,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:22,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:22,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:59:22,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517503665] [2020-10-29 09:59:22,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:22,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:59:22,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363036928] [2020-10-29 09:59:22,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:59:22,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:59:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:59:22,564 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand 21 states. [2020-10-29 09:59:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:47,068 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2020-10-29 09:59:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:59:47,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:59:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:47,073 INFO L225 Difference]: With dead ends: 170 [2020-10-29 09:59:47,073 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 09:59:47,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:59:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 09:59:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2020-10-29 09:59:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:59:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-10-29 09:59:47,108 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 30 [2020-10-29 09:59:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:47,109 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-10-29 09:59:47,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:59:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-10-29 09:59:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:59:47,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:47,110 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:47,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:59:47,110 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:47,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:47,111 INFO L82 PathProgramCache]: Analyzing trace with hash 578360019, now seen corresponding path program 6 times [2020-10-29 09:59:47,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:47,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043444972] [2020-10-29 09:59:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:47,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:47,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 663 [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:59:47,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:59:47,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:48,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:48,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:48,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:48,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:48,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:48,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:59:48,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:48,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:48,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:48,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-29 09:59:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:48,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:59:48,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:48,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:59:48,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:59:48,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043444972] [2020-10-29 09:59:48,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:48,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:59:48,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353922709] [2020-10-29 09:59:48,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:59:48,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:48,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:59:48,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:59:48,386 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 17 states. [2020-10-29 09:59:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:59:56,770 INFO L93 Difference]: Finished difference Result 156 states and 175 transitions. [2020-10-29 09:59:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:59:56,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-29 09:59:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:59:56,774 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:59:56,774 INFO L226 Difference]: Without dead ends: 153 [2020-10-29 09:59:56,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:59:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-29 09:59:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2020-10-29 09:59:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:59:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-10-29 09:59:56,819 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 32 [2020-10-29 09:59:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:59:56,819 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-10-29 09:59:56,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:59:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-10-29 09:59:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:59:56,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:59:56,821 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:59:56,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:59:56,821 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:59:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:59:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1183657790, now seen corresponding path program 16 times [2020-10-29 09:59:56,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:59:56,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045256785] [2020-10-29 09:59:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:59:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:56,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:57,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:57,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:59:57,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:57,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-29 09:59:57,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:57,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:57,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:59:57,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:59:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:59:57,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:58,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:59:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:59:58,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:59:58,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:59:58,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:59:58,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:59:58,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:59:58,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:59:58,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:59:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:59:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:59:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:59:58,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:59:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:59:58,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045256785] [2020-10-29 09:59:58,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:59:58,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:59:58,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820266390] [2020-10-29 09:59:58,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:59:58,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:59:58,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:59:58,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:59:58,705 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 22 states. [2020-10-29 10:00:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:04,864 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2020-10-29 10:00:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 10:00:04,865 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 10:00:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:04,866 INFO L225 Difference]: With dead ends: 159 [2020-10-29 10:00:04,867 INFO L226 Difference]: Without dead ends: 156 [2020-10-29 10:00:04,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 10:00:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-29 10:00:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2020-10-29 10:00:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 10:00:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2020-10-29 10:00:04,911 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 31 [2020-10-29 10:00:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:04,911 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2020-10-29 10:00:04,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 10:00:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2020-10-29 10:00:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 10:00:04,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:04,912 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:04,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 10:00:04,913 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1163837309, now seen corresponding path program 7 times [2020-10-29 10:00:04,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:04,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797420111] [2020-10-29 10:00:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:04,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:05,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:05,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 10:00:05,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:05,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-29 10:00:05,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:05,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 10:00:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 10:00:05,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 10:00:05,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:06,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:06,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:06,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:00:06,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:06,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:06,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 10:00:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:06,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:06,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 10:00:06,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:06,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797420111] [2020-10-29 10:00:06,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:06,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 10:00:06,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883758430] [2020-10-29 10:00:06,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 10:00:06,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:06,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 10:00:06,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-29 10:00:06,193 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 18 states. [2020-10-29 10:00:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:17,105 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2020-10-29 10:00:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 10:00:17,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-29 10:00:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:17,107 INFO L225 Difference]: With dead ends: 159 [2020-10-29 10:00:17,107 INFO L226 Difference]: Without dead ends: 156 [2020-10-29 10:00:17,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 10:00:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-29 10:00:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2020-10-29 10:00:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 10:00:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-29 10:00:17,152 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 33 [2020-10-29 10:00:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:17,153 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-29 10:00:17,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 10:00:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-29 10:00:17,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 10:00:17,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:17,154 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:17,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 10:00:17,154 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash 699804946, now seen corresponding path program 17 times [2020-10-29 10:00:17,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:17,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552716209] [2020-10-29 10:00:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:18,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:18,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 10:00:18,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:18,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-29 10:00:18,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:18,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 10:00:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 10:00:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 10:00:18,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:19,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:19,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:19,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:19,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552716209] [2020-10-29 10:00:19,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:19,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 10:00:19,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755402503] [2020-10-29 10:00:19,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 10:00:19,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:19,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 10:00:19,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-29 10:00:19,120 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 23 states. [2020-10-29 10:00:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:25,488 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-10-29 10:00:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 10:00:25,489 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-29 10:00:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:25,490 INFO L225 Difference]: With dead ends: 164 [2020-10-29 10:00:25,490 INFO L226 Difference]: Without dead ends: 161 [2020-10-29 10:00:25,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 10:00:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-29 10:00:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-29 10:00:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 10:00:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2020-10-29 10:00:25,536 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 32 [2020-10-29 10:00:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:25,536 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2020-10-29 10:00:25,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 10:00:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2020-10-29 10:00:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 10:00:25,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:25,537 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:25,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 10:00:25,537 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash 490117538, now seen corresponding path program 8 times [2020-10-29 10:00:25,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:25,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863253743] [2020-10-29 10:00:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:26,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:26,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 10:00:26,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:26,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-29 10:00:26,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:26,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:26,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 10:00:26,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 10:00:26,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 10:00:26,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:26,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:26,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:26,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:26,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:26,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:26,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:00:26,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:26,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:26,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:26,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:26,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:26,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:26,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-29 10:00:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:26,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:26,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:26,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 10:00:26,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:26,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-29 10:00:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:26,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 10:00:26,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 10:00:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 10:00:26,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863253743] [2020-10-29 10:00:26,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:26,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 10:00:26,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159913797] [2020-10-29 10:00:26,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 10:00:26,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:26,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 10:00:26,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:00:26,612 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand 14 states. [2020-10-29 10:00:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:28,213 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2020-10-29 10:00:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 10:00:28,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-29 10:00:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:28,216 INFO L225 Difference]: With dead ends: 164 [2020-10-29 10:00:28,216 INFO L226 Difference]: Without dead ends: 161 [2020-10-29 10:00:28,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-29 10:00:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-29 10:00:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 125. [2020-10-29 10:00:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 10:00:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2020-10-29 10:00:28,261 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 35 [2020-10-29 10:00:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:28,261 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2020-10-29 10:00:28,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 10:00:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2020-10-29 10:00:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 10:00:28,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:28,262 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:28,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 10:00:28,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1042392382, now seen corresponding path program 18 times [2020-10-29 10:00:28,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:28,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704102043] [2020-10-29 10:00:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:28,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 945 [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 10:00:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 10:00:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:30,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:30,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:30,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:30,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704102043] [2020-10-29 10:00:30,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:30,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 10:00:30,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613831644] [2020-10-29 10:00:30,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 10:00:30,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 10:00:30,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-29 10:00:30,252 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 24 states.