/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/array-crafted/zero_sum_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:23:11,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:23:11,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:23:11,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:23:11,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:23:11,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:23:11,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:23:11,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:23:11,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:23:11,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:23:11,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:23:11,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:23:11,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:23:11,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:23:11,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:23:11,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:23:11,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:23:11,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:23:11,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:23:11,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:23:11,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:23:11,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:23:11,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:23:11,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:23:11,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:23:11,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:23:11,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:23:11,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:23:11,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:23:11,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:23:11,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:23:11,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:23:11,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:23:11,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:23:11,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:23:11,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:23:11,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:23:11,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:23:11,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:23:11,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:23:11,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:23:11,949 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 03:23:12,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:23:12,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:23:12,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:23:12,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:23:12,005 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:23:12,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:23:12,006 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:23:12,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:23:12,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:23:12,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:23:12,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:23:12,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:23:12,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:23:12,007 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:23:12,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:23:12,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:23:12,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:23:12,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:23:12,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:23:12,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:23:12,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:23:12,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:23:12,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:23:12,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:23:12,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:23:12,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:23:12,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:23:12,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:23:12,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:23:12,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:23:12,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:23:12,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:23:12,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:23:12,420 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:23:12,421 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:23:12,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-29 03:23:12,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/903247988/67dc5f2dbce54794b7294396be67de1d/FLAG9dc187e13 [2020-10-29 03:23:13,291 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:23:13,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-29 03:23:13,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/903247988/67dc5f2dbce54794b7294396be67de1d/FLAG9dc187e13 [2020-10-29 03:23:13,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/903247988/67dc5f2dbce54794b7294396be67de1d [2020-10-29 03:23:13,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:23:13,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:23:13,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:13,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:23:13,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:23:13,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d774bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13, skipping insertion in model container [2020-10-29 03:23:13,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:23:13,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:23:13,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:13,885 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:23:13,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:13,928 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:23:13,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13 WrapperNode [2020-10-29 03:23:13,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:13,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:23:13,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:23:13,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:23:13,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (1/1) ... [2020-10-29 03:23:13,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:23:13,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:23:13,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:23:13,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:23:13,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (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 03:23:14,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:23:14,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:23:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:23:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:23:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:23:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:23:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:23:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:23:14,079 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:23:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:23:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:23:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:23:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-29 03:23:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:23:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:23:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:23:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:23:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:23:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:23:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:23:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:23:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:23:14,542 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:23:14,542 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-29 03:23:14,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:14 BoogieIcfgContainer [2020-10-29 03:23:14,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:23:14,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:23:14,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:23:14,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:23:14,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:23:13" (1/3) ... [2020-10-29 03:23:14,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638f237b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:14, skipping insertion in model container [2020-10-29 03:23:14,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:13" (2/3) ... [2020-10-29 03:23:14,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638f237b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:14, skipping insertion in model container [2020-10-29 03:23:14,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:14" (3/3) ... [2020-10-29 03:23:14,575 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2020-10-29 03:23:14,599 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:23:14,605 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:23:14,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:23:14,653 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:23:14,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:23:14,653 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:23:14,653 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:23:14,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:23:14,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:23:14,654 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:23:14,654 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:23:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-29 03:23:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 03:23:14,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:14,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:14,682 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1679398581, now seen corresponding path program 1 times [2020-10-29 03:23:14,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:14,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913664859] [2020-10-29 03:23:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:14,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:16,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 03:23:16,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:16,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1224 [2020-10-29 03:23:16,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:16,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:23:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:23:16,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:16,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:16,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:16,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:23:16,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:16,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:16,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:16,312 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 03:23:16,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913664859] [2020-10-29 03:23:16,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:23:16,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 03:23:16,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489318970] [2020-10-29 03:23:16,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:16,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:16,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:16,340 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-29 03:23:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:16,637 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2020-10-29 03:23:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:23:16,639 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-29 03:23:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:16,648 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:23:16,648 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 03:23:16,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:23:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 03:23:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 03:23:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 03:23:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-29 03:23:16,699 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-10-29 03:23:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:16,700 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-29 03:23:16,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-29 03:23:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 03:23:16,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:16,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:16,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:23:16,702 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash -203566653, now seen corresponding path program 1 times [2020-10-29 03:23:16,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:16,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286275299] [2020-10-29 03:23:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:16,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:18,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:18,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 03:23:18,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:23:18,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1856 [2020-10-29 03:23:18,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:18,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:18,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:23:18,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:18,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:23:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:23:18,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:18,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:18,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:18,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:18,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:18,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:23:18,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:18,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:18,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:18,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:18,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:18,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:23:18,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286275299] [2020-10-29 03:23:18,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:23:18,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:23:18,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120036380] [2020-10-29 03:23:18,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:23:18,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:18,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:23:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:23:18,695 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-29 03:23:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:18,907 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-10-29 03:23:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:23:18,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-29 03:23:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:18,909 INFO L225 Difference]: With dead ends: 62 [2020-10-29 03:23:18,909 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 03:23:18,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:23:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 03:23:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-29 03:23:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 03:23:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-29 03:23:18,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-10-29 03:23:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:18,921 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-29 03:23:18,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:23:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-29 03:23:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:23:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:18,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:18,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:23:18,923 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:18,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1073664907, now seen corresponding path program 1 times [2020-10-29 03:23:18,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:18,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431966079] [2020-10-29 03:23:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:18,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:18,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:18,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:19,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:19,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:20,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:20,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:21,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:21,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:23,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:23,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 03:23:23,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:23:23,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:23:23,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:23,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:23,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:23,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:23:23,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:24,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:24,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:24,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:24,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:24,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:24,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:24,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:23:24,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431966079] [2020-10-29 03:23:24,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:24,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:23:24,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601914195] [2020-10-29 03:23:24,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:24,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:24,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:24,083 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-29 03:23:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:24,374 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-29 03:23:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:23:24,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-29 03:23:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:24,377 INFO L225 Difference]: With dead ends: 64 [2020-10-29 03:23:24,377 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 03:23:24,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:23:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 03:23:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-29 03:23:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 03:23:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-29 03:23:24,395 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2020-10-29 03:23:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:24,398 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-29 03:23:24,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-29 03:23:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:23:24,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:24,401 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:24,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:23:24,402 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash 169491669, now seen corresponding path program 2 times [2020-10-29 03:23:24,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:24,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202437457] [2020-10-29 03:23:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:24,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:29,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:23:29,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:23:29,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:23:29,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:29,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:23:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:23:29,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:29,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:29,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:29,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:29,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:29,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:29,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:29,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:29,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:23:29,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202437457] [2020-10-29 03:23:29,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:29,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:23:29,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453252270] [2020-10-29 03:23:29,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:23:29,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:23:29,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:29,986 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-10-29 03:23:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:30,596 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-29 03:23:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:30,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-29 03:23:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:30,598 INFO L225 Difference]: With dead ends: 68 [2020-10-29 03:23:30,598 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:23:30,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:23:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:23:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-29 03:23:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 03:23:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-29 03:23:30,611 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-29 03:23:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:30,611 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-29 03:23:30,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:23:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-29 03:23:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:23:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:30,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:30,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:23:30,614 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash -92060713, now seen corresponding path program 3 times [2020-10-29 03:23:30,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:30,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304207946] [2020-10-29 03:23:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:30,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:30,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:30,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:35,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:35,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:23:35,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:35,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:23:35,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:35,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:35,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:35,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:35,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:23:35,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:35,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:35,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:35,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:35,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:35,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:35,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:35,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:35,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:35,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:35,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:35,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:35,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 03:23:35,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304207946] [2020-10-29 03:23:35,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:35,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:35,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448330124] [2020-10-29 03:23:35,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:35,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:35,811 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 10 states. [2020-10-29 03:23:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:36,236 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-29 03:23:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:23:36,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-29 03:23:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:36,238 INFO L225 Difference]: With dead ends: 125 [2020-10-29 03:23:36,238 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:23:36,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:23:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2020-10-29 03:23:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 03:23:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-29 03:23:36,253 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 43 [2020-10-29 03:23:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:36,253 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-29 03:23:36,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-29 03:23:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:23:36,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:36,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:36,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:23:36,255 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:36,256 INFO L82 PathProgramCache]: Analyzing trace with hash 638925081, now seen corresponding path program 4 times [2020-10-29 03:23:36,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:36,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032317400] [2020-10-29 03:23:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:36,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:38,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:41,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:41,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:23:41,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:41,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 03:23:41,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:41,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:41,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:23:41,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:41,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:41,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:41,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:41,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:41,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:41,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:41,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:41,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:41,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:41,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-29 03:23:41,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032317400] [2020-10-29 03:23:41,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:41,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:41,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997325585] [2020-10-29 03:23:41,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:41,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:41,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:41,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:41,441 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 10 states. [2020-10-29 03:23:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:41,865 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-29 03:23:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 03:23:41,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-29 03:23:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:41,867 INFO L225 Difference]: With dead ends: 70 [2020-10-29 03:23:41,867 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 03:23:41,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 03:23:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 03:23:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 03:23:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-29 03:23:41,877 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2020-10-29 03:23:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:41,877 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-29 03:23:41,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-29 03:23:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 03:23:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:41,879 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:41,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:23:41,879 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:41,880 INFO L82 PathProgramCache]: Analyzing trace with hash -22589025, now seen corresponding path program 5 times [2020-10-29 03:23:41,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:41,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45350986] [2020-10-29 03:23:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:41,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:42,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:42,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:44,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:45,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:45,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:46,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:46,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:46,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:23:46,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:23:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:23:46,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:46,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:23:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 03:23:46,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:47,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:47,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:47,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:47,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:47,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:47,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:47,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:47,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:23:47,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45350986] [2020-10-29 03:23:47,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:47,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:23:47,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2564787] [2020-10-29 03:23:47,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:23:47,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:47,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:23:47,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:23:47,885 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 21 states. [2020-10-29 03:23:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:48,745 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-29 03:23:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:23:48,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-29 03:23:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:48,747 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:23:48,747 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:23:48,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:23:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:23:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-29 03:23:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 03:23:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-10-29 03:23:48,761 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 51 [2020-10-29 03:23:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:48,762 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-10-29 03:23:48,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:23:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-10-29 03:23:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:23:48,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:48,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:48,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:23:48,766 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash 791895585, now seen corresponding path program 6 times [2020-10-29 03:23:48,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:48,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503023351] [2020-10-29 03:23:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:48,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:48,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:48,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:53,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:53,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:23:53,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:53,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:23:53,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:53,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:23:53,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:53,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:53,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:53,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:53,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:53,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:53,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:23:53,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:53,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-29 03:23:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503023351] [2020-10-29 03:23:53,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:53,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:53,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375102706] [2020-10-29 03:23:53,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:53,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:53,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:53,972 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 12 states. [2020-10-29 03:23:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:54,524 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-10-29 03:23:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:23:54,525 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-29 03:23:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:54,526 INFO L225 Difference]: With dead ends: 153 [2020-10-29 03:23:54,526 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 03:23:54,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 03:23:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-10-29 03:23:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 03:23:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-29 03:23:54,556 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 53 [2020-10-29 03:23:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:54,557 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-29 03:23:54,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-29 03:23:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:23:54,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:54,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:54,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:23:54,559 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1991760099, now seen corresponding path program 7 times [2020-10-29 03:23:54,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:54,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129660560] [2020-10-29 03:23:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:54,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:54,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:55,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:55,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:59,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:59,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:23:59,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:59,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:23:59,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:59,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:23:59,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:59,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:59,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:59,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:59,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:59,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:59,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:59,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:59,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-29 03:23:59,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129660560] [2020-10-29 03:23:59,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:59,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:59,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728659800] [2020-10-29 03:23:59,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:59,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:59,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:59,763 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-29 03:24:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:00,242 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-29 03:24:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:24:00,242 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-29 03:24:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:00,243 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:24:00,243 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:24:00,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:24:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:24:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 03:24:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 03:24:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-29 03:24:00,253 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-29 03:24:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:00,254 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-29 03:24:00,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:24:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-29 03:24:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:24:00,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:00,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:00,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:24:00,258 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1839353367, now seen corresponding path program 8 times [2020-10-29 03:24:00,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:00,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622221107] [2020-10-29 03:24:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:00,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:01,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:02,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:03,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:04,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:04,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:05,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:24:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:06,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:06,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:06,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:06,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:06,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:06,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:06,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:06,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:06,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:24:06,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622221107] [2020-10-29 03:24:06,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:06,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 03:24:06,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920337737] [2020-10-29 03:24:06,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 03:24:06,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 03:24:06,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:24:06,545 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 27 states. [2020-10-29 03:24:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:07,924 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-10-29 03:24:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:24:07,924 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-29 03:24:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:07,926 INFO L225 Difference]: With dead ends: 100 [2020-10-29 03:24:07,926 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 03:24:07,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:24:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 03:24:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-29 03:24:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 03:24:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-29 03:24:07,946 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 61 [2020-10-29 03:24:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:07,948 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-29 03:24:07,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 03:24:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-29 03:24:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:24:07,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:07,950 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:07,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:24:07,953 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1826874347, now seen corresponding path program 9 times [2020-10-29 03:24:07,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:07,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199279886] [2020-10-29 03:24:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:07,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:08,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:08,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:09,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:12,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:12,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:24:12,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:12,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:24:12,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:12,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 03:24:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:24:12,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:13,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:13,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:13,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:13,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:13,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:24:13,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:13,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:13,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:13,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:13,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:24:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-29 03:24:13,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199279886] [2020-10-29 03:24:13,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:13,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:13,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352296405] [2020-10-29 03:24:13,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:13,188 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 14 states. [2020-10-29 03:24:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:13,819 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2020-10-29 03:24:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:24:13,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-29 03:24:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:13,820 INFO L225 Difference]: With dead ends: 181 [2020-10-29 03:24:13,821 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:24:13,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:24:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:24:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2020-10-29 03:24:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 03:24:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-29 03:24:13,841 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 63 [2020-10-29 03:24:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:13,841 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-29 03:24:13,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-29 03:24:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:24:13,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:13,847 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:13,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:24:13,847 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash 323093549, now seen corresponding path program 10 times [2020-10-29 03:24:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:13,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123283318] [2020-10-29 03:24:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:13,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:13,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:14,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:18,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:18,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 03:24:18,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:24:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:24:18,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:18,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:24:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:19,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:19,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:19,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:19,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:19,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:19,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:19,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:19,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:19,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:19,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:19,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:19,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-29 03:24:19,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123283318] [2020-10-29 03:24:19,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:19,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:19,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504903535] [2020-10-29 03:24:19,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:19,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:19,033 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 14 states. [2020-10-29 03:24:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:19,616 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-29 03:24:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:24:19,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-29 03:24:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:19,618 INFO L225 Difference]: With dead ends: 98 [2020-10-29 03:24:19,618 INFO L226 Difference]: Without dead ends: 72 [2020-10-29 03:24:19,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:24:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-29 03:24:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-29 03:24:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 03:24:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-29 03:24:19,629 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2020-10-29 03:24:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:19,629 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-29 03:24:19,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-29 03:24:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 03:24:19,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:19,631 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:19,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:24:19,631 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash 585956787, now seen corresponding path program 11 times [2020-10-29 03:24:19,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:19,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623052151] [2020-10-29 03:24:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:20,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:23,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:23,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:24,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:24,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:24,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 03:24:24,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:24:24,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5210 [2020-10-29 03:24:24,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:24,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 03:24:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 03:24:24,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:27,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:27,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:27,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:27,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:27,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:27,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:27,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:27,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:27,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:27,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:27,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 03:24:27,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623052151] [2020-10-29 03:24:27,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:27,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 03:24:27,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940303018] [2020-10-29 03:24:27,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 03:24:27,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 03:24:27,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:24:27,564 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 41 states. [2020-10-29 03:24:29,454 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-29 03:24:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:32,323 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-29 03:24:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 03:24:32,323 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 71 [2020-10-29 03:24:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:32,325 INFO L225 Difference]: With dead ends: 116 [2020-10-29 03:24:32,325 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 03:24:32,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=246, Invalid=3786, Unknown=0, NotChecked=0, Total=4032 [2020-10-29 03:24:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 03:24:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2020-10-29 03:24:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 03:24:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-29 03:24:32,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 71 [2020-10-29 03:24:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:32,339 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-29 03:24:32,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 03:24:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-29 03:24:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 03:24:32,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:32,341 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:32,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:24:32,341 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1797491403, now seen corresponding path program 12 times [2020-10-29 03:24:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:32,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255096392] [2020-10-29 03:24:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:32,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:32,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:34,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:37,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 03:24:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:24:37,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:37,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:37,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:37,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:37,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:37,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:37,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:37,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:24:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-29 03:24:37,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255096392] [2020-10-29 03:24:37,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:37,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:24:37,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982057767] [2020-10-29 03:24:37,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:24:37,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:24:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:24:37,612 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 16 states. [2020-10-29 03:24:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:38,325 INFO L93 Difference]: Finished difference Result 209 states and 225 transitions. [2020-10-29 03:24:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:24:38,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-29 03:24:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:38,327 INFO L225 Difference]: With dead ends: 209 [2020-10-29 03:24:38,327 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 03:24:38,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:24:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 03:24:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2020-10-29 03:24:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 03:24:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-10-29 03:24:38,347 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 73 [2020-10-29 03:24:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:38,347 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-10-29 03:24:38,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:24:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-10-29 03:24:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 03:24:38,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:38,349 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:38,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:24:38,349 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1083398903, now seen corresponding path program 13 times [2020-10-29 03:24:38,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:38,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836364746] [2020-10-29 03:24:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:38,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:38,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:38,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:40,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:43,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:24:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:43,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:43,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:43,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:43,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 03:24:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836364746] [2020-10-29 03:24:43,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:43,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:24:43,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136712780] [2020-10-29 03:24:43,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:24:43,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:24:43,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:24:43,612 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 16 states. [2020-10-29 03:24:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:44,495 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-29 03:24:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:24:44,496 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-29 03:24:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:44,497 INFO L225 Difference]: With dead ends: 112 [2020-10-29 03:24:44,498 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 03:24:44,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:24:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 03:24:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-29 03:24:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 03:24:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-29 03:24:44,507 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2020-10-29 03:24:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:44,507 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-29 03:24:44,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:24:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-29 03:24:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 03:24:44,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:44,508 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:44,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:24:44,508 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1594043139, now seen corresponding path program 14 times [2020-10-29 03:24:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:44,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616537917] [2020-10-29 03:24:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:44,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:45,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:46,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:48,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:49,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:49,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 03:24:49,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:24:49,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5363 [2020-10-29 03:24:49,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:49,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-29 03:24:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 03:24:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:54,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:54,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:54,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:54,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:54,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:54,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:54,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:54,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:54,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 03:24:54,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616537917] [2020-10-29 03:24:54,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:54,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-29 03:24:54,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635488536] [2020-10-29 03:24:54,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-29 03:24:54,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:54,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-29 03:24:54,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2736, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 03:24:54,997 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 54 states. [2020-10-29 03:24:55,403 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-29 03:24:58,187 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 03:25:01,410 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-10-29 03:25:01,992 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 03:25:02,527 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 03:25:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:05,275 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2020-10-29 03:25:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 03:25:05,276 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 81 [2020-10-29 03:25:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:05,277 INFO L225 Difference]: With dead ends: 132 [2020-10-29 03:25:05,277 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 03:25:05,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=352, Invalid=7130, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 03:25:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 03:25:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2020-10-29 03:25:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 03:25:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2020-10-29 03:25:05,293 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 81 [2020-10-29 03:25:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:05,293 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2020-10-29 03:25:05,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-29 03:25:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2020-10-29 03:25:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 03:25:05,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:05,295 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:05,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:25:05,295 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash -44256769, now seen corresponding path program 15 times [2020-10-29 03:25:05,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:05,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092776336] [2020-10-29 03:25:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:05,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:05,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:05,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:07,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:10,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:10,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 03:25:10,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:25:10,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:25:10,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:10,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:25:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:10,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 03:25:10,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:10,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:10,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:10,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:10,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:10,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-29 03:25:10,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092776336] [2020-10-29 03:25:10,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:10,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:25:10,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115343138] [2020-10-29 03:25:10,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:25:10,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:25:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:25:10,622 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand 18 states. [2020-10-29 03:25:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:11,678 INFO L93 Difference]: Finished difference Result 237 states and 253 transitions. [2020-10-29 03:25:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:25:11,679 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-29 03:25:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:11,681 INFO L225 Difference]: With dead ends: 237 [2020-10-29 03:25:11,681 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 03:25:11,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:25:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 03:25:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2020-10-29 03:25:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 03:25:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-10-29 03:25:11,703 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 83 [2020-10-29 03:25:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:11,704 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-10-29 03:25:11,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:25:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-10-29 03:25:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 03:25:11,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:11,706 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:11,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:25:11,706 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:11,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:11,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1702658751, now seen corresponding path program 16 times [2020-10-29 03:25:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:11,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907422440] [2020-10-29 03:25:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:11,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:11,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:14,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:16,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:16,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 03:25:16,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:25:16,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:25:16,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:16,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:25:16,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:16,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 03:25:16,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:17,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:17,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:17,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:17,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:17,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:17,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:17,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:17,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-29 03:25:17,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907422440] [2020-10-29 03:25:17,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:17,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:25:17,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964773346] [2020-10-29 03:25:17,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:25:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:25:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:25:17,043 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 18 states. [2020-10-29 03:25:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:18,324 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-29 03:25:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:25:18,325 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-29 03:25:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:18,326 INFO L225 Difference]: With dead ends: 126 [2020-10-29 03:25:18,327 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 03:25:18,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:25:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 03:25:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-29 03:25:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 03:25:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-29 03:25:18,339 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 85 [2020-10-29 03:25:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:18,339 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-29 03:25:18,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:25:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-29 03:25:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 03:25:18,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:18,340 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:18,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:25:18,340 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1171466297, now seen corresponding path program 17 times [2020-10-29 03:25:18,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:18,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481401972] [2020-10-29 03:25:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:18,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:19,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:22,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:23,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:23,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 03:25:23,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:25:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5225 [2020-10-29 03:25:23,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:23,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-29 03:25:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:23,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 03:25:23,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:28,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:28,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:28,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:28,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:28,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:28,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:28,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:28,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:28,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:28,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:28,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:28,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-29 03:25:28,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481401972] [2020-10-29 03:25:28,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:28,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 03:25:28,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783854026] [2020-10-29 03:25:28,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 03:25:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:28,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 03:25:28,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2053, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 03:25:28,477 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 47 states. [2020-10-29 03:25:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:32,884 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2020-10-29 03:25:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 03:25:32,885 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2020-10-29 03:25:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:32,887 INFO L225 Difference]: With dead ends: 148 [2020-10-29 03:25:32,887 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 03:25:32,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=119, Invalid=2233, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 03:25:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 03:25:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2020-10-29 03:25:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 03:25:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2020-10-29 03:25:32,905 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 91 [2020-10-29 03:25:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:32,905 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2020-10-29 03:25:32,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 03:25:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2020-10-29 03:25:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-29 03:25:32,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:32,906 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:32,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:25:32,907 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:32,907 INFO L82 PathProgramCache]: Analyzing trace with hash 463223369, now seen corresponding path program 18 times [2020-10-29 03:25:32,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:32,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622001370] [2020-10-29 03:25:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:32,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:32,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:37,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:37,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 03:25:37,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:38,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:38,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:38,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:38,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:38,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:38,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:38,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:38,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:38,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:38,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:38,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-29 03:25:38,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622001370] [2020-10-29 03:25:38,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:38,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:25:38,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584402408] [2020-10-29 03:25:38,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:25:38,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:25:38,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:25:38,312 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand 20 states. [2020-10-29 03:25:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:39,627 INFO L93 Difference]: Finished difference Result 265 states and 281 transitions. [2020-10-29 03:25:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:25:39,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-29 03:25:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:39,630 INFO L225 Difference]: With dead ends: 265 [2020-10-29 03:25:39,631 INFO L226 Difference]: Without dead ends: 145 [2020-10-29 03:25:39,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:25:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-29 03:25:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-29 03:25:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-29 03:25:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2020-10-29 03:25:39,646 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 93 [2020-10-29 03:25:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:39,647 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2020-10-29 03:25:39,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:25:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2020-10-29 03:25:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 03:25:39,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:39,649 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:39,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:25:39,649 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1038224139, now seen corresponding path program 19 times [2020-10-29 03:25:39,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:39,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972387392] [2020-10-29 03:25:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:39,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:39,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:39,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:44,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 03:25:44,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:25:44,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:45,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:45,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:45,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:45,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:45,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:45,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:45,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:45,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:45,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:45,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:45,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-29 03:25:45,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972387392] [2020-10-29 03:25:45,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:45,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:25:45,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200093377] [2020-10-29 03:25:45,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:25:45,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:25:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:25:45,101 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 20 states. [2020-10-29 03:25:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:46,784 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-29 03:25:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:25:46,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-29 03:25:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:46,786 INFO L225 Difference]: With dead ends: 140 [2020-10-29 03:25:46,786 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 03:25:46,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:25:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 03:25:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-29 03:25:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 03:25:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-29 03:25:46,801 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2020-10-29 03:25:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:46,801 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-29 03:25:46,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:25:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-29 03:25:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 03:25:46,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:46,802 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:46,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:25:46,803 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:46,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2095798767, now seen corresponding path program 20 times [2020-10-29 03:25:46,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:46,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079657985] [2020-10-29 03:25:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:48,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:51,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:52,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:52,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 03:25:52,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:25:52,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5600 [2020-10-29 03:25:52,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:52,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:52,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-29 03:25:52,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:52,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 03:25:52,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:59,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:59,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:59,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:59,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-29 03:25:59,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079657985] [2020-10-29 03:25:59,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:59,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-29 03:25:59,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987843101] [2020-10-29 03:25:59,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-29 03:25:59,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-29 03:25:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2533, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 03:25:59,247 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 52 states. [2020-10-29 03:26:05,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:05,459 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2020-10-29 03:26:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 03:26:05,464 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 101 [2020-10-29 03:26:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:05,466 INFO L225 Difference]: With dead ends: 164 [2020-10-29 03:26:05,466 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 03:26:05,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 17 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=129, Invalid=2733, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 03:26:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 03:26:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 143. [2020-10-29 03:26:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-29 03:26:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2020-10-29 03:26:05,487 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 101 [2020-10-29 03:26:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:05,487 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2020-10-29 03:26:05,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-29 03:26:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2020-10-29 03:26:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-29 03:26:05,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:05,489 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:05,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:26:05,489 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1379226093, now seen corresponding path program 21 times [2020-10-29 03:26:05,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:05,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779628692] [2020-10-29 03:26:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:05,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:05,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:05,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:10,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 03:26:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:26:10,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:11,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:11,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:11,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:11,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:11,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:26:11,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:11,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:11,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:11,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-29 03:26:11,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779628692] [2020-10-29 03:26:11,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:11,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:26:11,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575373427] [2020-10-29 03:26:11,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:26:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:26:11,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:26:11,034 INFO L87 Difference]: Start difference. First operand 143 states and 150 transitions. Second operand 22 states. [2020-10-29 03:26:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:12,913 INFO L93 Difference]: Finished difference Result 293 states and 309 transitions. [2020-10-29 03:26:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:26:12,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-10-29 03:26:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:12,917 INFO L225 Difference]: With dead ends: 293 [2020-10-29 03:26:12,917 INFO L226 Difference]: Without dead ends: 159 [2020-10-29 03:26:12,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:26:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-29 03:26:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2020-10-29 03:26:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-29 03:26:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 152 transitions. [2020-10-29 03:26:12,941 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 152 transitions. Word has length 103 [2020-10-29 03:26:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:12,942 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 152 transitions. [2020-10-29 03:26:12,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:26:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 152 transitions. [2020-10-29 03:26:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-29 03:26:12,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:12,944 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:12,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:26:12,944 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1920377941, now seen corresponding path program 22 times [2020-10-29 03:26:12,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:12,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760819585] [2020-10-29 03:26:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:12,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:13,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:17,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-29 03:26:17,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:26:17,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:26:17,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:17,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:26:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 03:26:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 03:26:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:18,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:18,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:18,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:18,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:18,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:18,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:26:18,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:18,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:18,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:18,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:18,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:18,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-10-29 03:26:18,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760819585] [2020-10-29 03:26:18,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:18,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:26:18,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498582941] [2020-10-29 03:26:18,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:26:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:26:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:26:18,554 INFO L87 Difference]: Start difference. First operand 146 states and 152 transitions. Second operand 22 states. [2020-10-29 03:26:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:20,940 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-10-29 03:26:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:26:20,942 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-29 03:26:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:20,944 INFO L225 Difference]: With dead ends: 154 [2020-10-29 03:26:20,944 INFO L226 Difference]: Without dead ends: 112 [2020-10-29 03:26:20,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:26:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-29 03:26:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-29 03:26:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 03:26:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-29 03:26:20,973 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 105 [2020-10-29 03:26:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:20,974 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-29 03:26:20,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:26:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-29 03:26:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-29 03:26:20,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:20,975 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:20,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:26:20,976 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1589387301, now seen corresponding path program 23 times [2020-10-29 03:26:20,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:20,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345058077] [2020-10-29 03:26:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:26,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:26,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 03:26:26,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:26,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:26:26,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:26,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-29 03:26:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:26:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 03:26:26,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:27,386 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2020-10-29 03:26:29,895 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 03:26:30,208 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-29 03:26:30,479 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-29 03:26:30,741 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-29 03:26:31,021 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-29 03:26:31,299 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-29 03:26:31,581 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-29 03:26:31,874 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-29 03:26:32,182 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-29 03:26:33,044 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-29 03:26:33,387 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-29 03:26:33,746 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-29 03:26:34,067 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-29 03:26:34,397 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-29 03:26:34,794 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-29 03:26:35,203 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2020-10-29 03:26:35,586 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-29 03:26:35,965 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-29 03:26:36,320 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-29 03:26:36,668 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-29 03:26:37,021 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-29 03:26:37,367 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-29 03:26:37,738 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-29 03:26:38,117 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-29 03:26:38,493 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-29 03:26:38,877 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-29 03:26:39,267 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-29 03:26:39,648 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-29 03:26:40,088 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2020-10-29 03:26:40,446 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-29 03:26:40,969 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-29 03:26:41,716 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-29 03:26:42,622 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-29 03:26:43,118 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-29 03:26:43,816 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-29 03:26:44,219 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-29 03:26:44,638 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-29 03:26:45,082 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-29 03:26:45,546 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-29 03:26:45,926 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-29 03:26:46,311 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-29 03:26:46,655 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-29 03:26:49,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:49,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:49,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:49,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 20 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:26:49,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345058077] [2020-10-29 03:26:49,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:49,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-29 03:26:49,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819608610] [2020-10-29 03:26:49,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-29 03:26:49,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-29 03:26:49,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=6495, Unknown=0, NotChecked=0, Total=7310 [2020-10-29 03:26:49,442 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 86 states. [2020-10-29 03:26:49,915 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 3 [2020-10-29 03:26:50,590 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 39 [2020-10-29 03:26:52,100 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 73 [2020-10-29 03:26:53,581 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 80 [2020-10-29 03:26:54,624 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-10-29 03:26:55,739 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-29 03:26:56,338 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 03:26:59,100 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 110 [2020-10-29 03:27:00,137 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 102 [2020-10-29 03:27:01,127 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 101 [2020-10-29 03:27:01,829 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61