/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:07:05,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:07:05,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:07:05,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:07:05,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:07:05,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:07:05,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:07:05,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:07:05,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:07:05,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:07:05,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:07:05,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:07:05,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:07:05,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:07:05,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:07:05,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:07:05,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:07:05,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:07:05,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:07:05,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:07:05,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:07:05,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:07:05,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:07:05,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:07:05,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:07:05,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:07:05,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:07:05,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:07:05,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:07:05,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:07:05,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:07:05,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:07:05,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:07:05,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:07:05,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:07:05,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:07:05,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:07:05,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:07:05,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:07:05,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:07:05,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:07:05,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:07:05,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:07:05,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:07:05,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:07:05,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:07:05,922 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:07:05,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:07:05,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:07:05,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:07:05,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:07:05,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:07:05,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:07:05,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:07:05,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:07:05,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:07:05,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:07:05,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:07:05,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:07:05,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:07:05,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:07:05,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:07:05,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:07:05,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:07:05,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:07:05,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:07:05,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:07:05,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:07:05,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:07:05,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:07:05,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:07:05,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:07:06,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:07:06,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:07:06,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:07:06,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:07:06,371 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:07:06,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-28 15:07:06,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf1f8c860/32fd9f9ab25d404c8c10503071b35705/FLAG9ab319bde [2020-10-28 15:07:07,081 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:07:07,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de61.c [2020-10-28 15:07:07,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf1f8c860/32fd9f9ab25d404c8c10503071b35705/FLAG9ab319bde [2020-10-28 15:07:07,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf1f8c860/32fd9f9ab25d404c8c10503071b35705 [2020-10-28 15:07:07,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:07:07,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:07:07,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:07:07,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:07:07,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:07:07,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc1ef02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07, skipping insertion in model container [2020-10-28 15:07:07,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:07:07,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:07:07,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:07:07,795 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:07:07,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:07:07,847 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:07:07,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07 WrapperNode [2020-10-28 15:07:07,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:07:07,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:07:07,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:07:07,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:07:07,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... [2020-10-28 15:07:07,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:07:07,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:07:07,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:07:07,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:07:07,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:07:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:07:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:07:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:07:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:07:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:07:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:07:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:07:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:07:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:07:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 15:07:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:07:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:07:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:07:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:07:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:07:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:07:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:07:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:07:08,240 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:07:08,241 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 15:07:08,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:07:08 BoogieIcfgContainer [2020-10-28 15:07:08,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:07:08,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:07:08,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:07:08,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:07:08,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:07:07" (1/3) ... [2020-10-28 15:07:08,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742c7d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:07:08, skipping insertion in model container [2020-10-28 15:07:08,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:07" (2/3) ... [2020-10-28 15:07:08,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742c7d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:07:08, skipping insertion in model container [2020-10-28 15:07:08,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:07:08" (3/3) ... [2020-10-28 15:07:08,252 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de61.c [2020-10-28 15:07:08,288 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:07:08,292 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:07:08,307 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:07:08,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:07:08,336 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:07:08,337 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:07:08,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:07:08,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:07:08,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:07:08,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:07:08,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:07:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 15:07:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:07:08,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:08,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:08,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash -929595754, now seen corresponding path program 1 times [2020-10-28 15:07:08,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:08,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773849399] [2020-10-28 15:07:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:08,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:09,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:09,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:09,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:07:09,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:09,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1063 [2020-10-28 15:07:09,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:09,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:09,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:07:09,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:09,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:07:09,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:09,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:09,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:09,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:09,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:09,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:07:09,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:09,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:09,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:09,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:09,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773849399] [2020-10-28 15:07:09,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:09,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:07:09,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996596148] [2020-10-28 15:07:09,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:07:09,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:07:09,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:07:09,771 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 15:07:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:09,925 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2020-10-28 15:07:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:07:09,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 15:07:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:09,935 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:07:09,936 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:07:09,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:07:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:07:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:07:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:07:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-10-28 15:07:10,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 18 [2020-10-28 15:07:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:10,002 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-10-28 15:07:10,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:07:10,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-10-28 15:07:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:07:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:10,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:10,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:07:10,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 689097498, now seen corresponding path program 1 times [2020-10-28 15:07:10,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:10,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97162985] [2020-10-28 15:07:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:10,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:10,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:10,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:07:10,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:10,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-28 15:07:10,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:10,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:07:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:07:10,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:11,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:11,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:11,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:11,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:11,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:11,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:07:11,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:11,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:11,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:11,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:11,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97162985] [2020-10-28 15:07:11,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:11,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 15:07:11,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245799297] [2020-10-28 15:07:11,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:07:11,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:07:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:11,104 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 8 states. [2020-10-28 15:07:11,387 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 15:07:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:11,691 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2020-10-28 15:07:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:07:11,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-28 15:07:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:11,693 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:07:11,693 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:07:11,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:07:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:07:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:07:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:07:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-28 15:07:11,710 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2020-10-28 15:07:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:11,711 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-28 15:07:11,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:07:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-28 15:07:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:07:11,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:11,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:11,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:07:11,712 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash -785900514, now seen corresponding path program 1 times [2020-10-28 15:07:11,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:11,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133998952] [2020-10-28 15:07:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:11,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:11,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:11,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:11,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:11,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:12,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:07:12,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:12,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-28 15:07:12,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:12,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:07:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:12,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:12,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:12,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:12,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:12,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:07:12,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:12,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:12,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:12,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133998952] [2020-10-28 15:07:12,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:12,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:12,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125492505] [2020-10-28 15:07:12,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:12,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:12,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:12,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:12,677 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 5 states. [2020-10-28 15:07:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:12,858 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2020-10-28 15:07:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:12,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:07:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:12,861 INFO L225 Difference]: With dead ends: 45 [2020-10-28 15:07:12,862 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:07:12,862 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 [2020-10-28 15:07:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:07:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-28 15:07:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:07:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2020-10-28 15:07:12,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 19 [2020-10-28 15:07:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:12,883 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2020-10-28 15:07:12,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2020-10-28 15:07:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:07:12,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:12,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:12,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:07:12,885 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1784199578, now seen corresponding path program 1 times [2020-10-28 15:07:12,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:12,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033143010] [2020-10-28 15:07:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:12,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:13,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:07:13,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:13,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-28 15:07:13,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:13,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:07:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:07:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:07:13,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:13,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:13,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:13,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:13,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:07:13,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:13,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:13,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:07:13,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033143010] [2020-10-28 15:07:13,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:13,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:07:13,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335678239] [2020-10-28 15:07:13,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:07:13,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:13,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:07:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:07:13,648 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand 4 states. [2020-10-28 15:07:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:13,755 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-10-28 15:07:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:07:13,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 15:07:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:13,759 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:07:13,759 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 15:07:13,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 15:07:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-28 15:07:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:07:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2020-10-28 15:07:13,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 20 [2020-10-28 15:07:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:13,774 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2020-10-28 15:07:13,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:07:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2020-10-28 15:07:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:07:13,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:13,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:13,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:07:13,776 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash -153329492, now seen corresponding path program 1 times [2020-10-28 15:07:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:13,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816049335] [2020-10-28 15:07:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:13,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:14,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:07:14,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:07:14,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-28 15:07:14,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:14,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:07:14,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:14,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:14,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:14,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:14,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:14,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:14,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:14,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:14,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:14,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:14,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:14,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:07:14,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816049335] [2020-10-28 15:07:14,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:14,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:14,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739464186] [2020-10-28 15:07:14,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:14,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:14,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:14,906 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 6 states. [2020-10-28 15:07:15,163 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-28 15:07:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:15,265 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-10-28 15:07:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:07:15,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 15:07:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:15,267 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:07:15,267 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:07:15,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:07:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-28 15:07:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:07:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2020-10-28 15:07:15,281 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 20 [2020-10-28 15:07:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:15,282 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2020-10-28 15:07:15,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2020-10-28 15:07:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:07:15,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:15,283 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:15,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:07:15,284 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:15,284 INFO L82 PathProgramCache]: Analyzing trace with hash 733801370, now seen corresponding path program 2 times [2020-10-28 15:07:15,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:15,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793673156] [2020-10-28 15:07:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:15,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:16,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:07:16,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:16,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-28 15:07:16,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:16,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:16,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:16,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:16,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:16,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:16,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:16,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:16,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:16,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:16,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:16,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793673156] [2020-10-28 15:07:16,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:16,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:16,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349747656] [2020-10-28 15:07:16,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:16,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:16,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:16,367 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 6 states. [2020-10-28 15:07:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:16,637 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2020-10-28 15:07:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:07:16,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 15:07:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:16,638 INFO L225 Difference]: With dead ends: 67 [2020-10-28 15:07:16,638 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:07:16,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:07:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-28 15:07:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:07:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2020-10-28 15:07:16,655 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 20 [2020-10-28 15:07:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:16,656 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2020-10-28 15:07:16,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2020-10-28 15:07:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:07:16,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:16,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:16,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:07:16,657 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1149097982, now seen corresponding path program 1 times [2020-10-28 15:07:16,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:16,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831471033] [2020-10-28 15:07:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:16,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:17,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:07:17,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:07:17,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-28 15:07:17,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:17,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:17,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:17,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:17,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:07:17,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:17,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:17,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:17,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:17,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:17,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:17,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:17,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:17,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:17,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:17,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:17,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:07:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831471033] [2020-10-28 15:07:17,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:17,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:17,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991312382] [2020-10-28 15:07:17,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:17,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:17,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:17,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:17,416 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand 6 states. [2020-10-28 15:07:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:17,684 INFO L93 Difference]: Finished difference Result 72 states and 102 transitions. [2020-10-28 15:07:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:07:17,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 15:07:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:17,685 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:07:17,685 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 15:07:17,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:07:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 15:07:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-28 15:07:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 15:07:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 83 transitions. [2020-10-28 15:07:17,696 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 83 transitions. Word has length 21 [2020-10-28 15:07:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:17,697 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 83 transitions. [2020-10-28 15:07:17,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 83 transitions. [2020-10-28 15:07:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:07:17,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:17,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:17,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:07:17,698 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:17,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:17,699 INFO L82 PathProgramCache]: Analyzing trace with hash 125232335, now seen corresponding path program 1 times [2020-10-28 15:07:17,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:17,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353723901] [2020-10-28 15:07:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:17,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:18,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:18,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:18,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:07:18,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-28 15:07:18,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:18,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:07:18,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:18,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:18,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:18,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:18,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:18,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:18,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:07:18,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:18,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:18,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:18,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:18,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:18,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:07:18,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353723901] [2020-10-28 15:07:18,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:18,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:18,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575539120] [2020-10-28 15:07:18,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:18,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:18,490 INFO L87 Difference]: Start difference. First operand 58 states and 83 transitions. Second operand 5 states. [2020-10-28 15:07:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:18,679 INFO L93 Difference]: Finished difference Result 101 states and 149 transitions. [2020-10-28 15:07:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:18,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 15:07:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:18,681 INFO L225 Difference]: With dead ends: 101 [2020-10-28 15:07:18,681 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 15:07:18,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 15:07:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2020-10-28 15:07:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:07:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 99 transitions. [2020-10-28 15:07:18,693 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 99 transitions. Word has length 21 [2020-10-28 15:07:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:18,694 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 99 transitions. [2020-10-28 15:07:18,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 99 transitions. [2020-10-28 15:07:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:07:18,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:18,695 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:18,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:07:18,696 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:18,696 INFO L82 PathProgramCache]: Analyzing trace with hash 599919518, now seen corresponding path program 3 times [2020-10-28 15:07:18,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:18,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967668856] [2020-10-28 15:07:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:18,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:18,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:19,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:07:19,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:19,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-28 15:07:19,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:19,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:19,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:19,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:19,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:07:19,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:19,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:19,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:19,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:19,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:19,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:19,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:19,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:19,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:19,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:19,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:19,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967668856] [2020-10-28 15:07:19,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:19,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:19,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120190331] [2020-10-28 15:07:19,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:19,923 INFO L87 Difference]: Start difference. First operand 69 states and 99 transitions. Second operand 7 states. [2020-10-28 15:07:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:20,267 INFO L93 Difference]: Finished difference Result 121 states and 184 transitions. [2020-10-28 15:07:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:07:20,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 15:07:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:20,269 INFO L225 Difference]: With dead ends: 121 [2020-10-28 15:07:20,269 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 15:07:20,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 15:07:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2020-10-28 15:07:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 15:07:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2020-10-28 15:07:20,300 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 21 [2020-10-28 15:07:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:20,300 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2020-10-28 15:07:20,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2020-10-28 15:07:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:07:20,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:20,302 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:20,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:07:20,302 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:20,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1425323284, now seen corresponding path program 2 times [2020-10-28 15:07:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:20,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791589747] [2020-10-28 15:07:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:20,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:20,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:07:20,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 15:07:20,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:20,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:20,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:20,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:20,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:07:20,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:20,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:20,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:20,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:20,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:07:20,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:20,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:20,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:07:20,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791589747] [2020-10-28 15:07:20,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:20,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070705890] [2020-10-28 15:07:20,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:20,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:20,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:20,597 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand 5 states. [2020-10-28 15:07:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:20,783 INFO L93 Difference]: Finished difference Result 130 states and 190 transitions. [2020-10-28 15:07:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:20,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 15:07:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:20,785 INFO L225 Difference]: With dead ends: 130 [2020-10-28 15:07:20,785 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 15:07:20,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 15:07:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-28 15:07:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 15:07:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2020-10-28 15:07:20,798 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 22 [2020-10-28 15:07:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:20,799 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2020-10-28 15:07:20,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2020-10-28 15:07:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:07:20,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:20,800 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:20,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:07:20,800 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1873834406, now seen corresponding path program 2 times [2020-10-28 15:07:20,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:20,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063604188] [2020-10-28 15:07:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:20,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:07:21,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:07:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-28 15:07:21,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:07:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:07:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:21,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:21,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:07:21,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063604188] [2020-10-28 15:07:21,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:21,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751722078] [2020-10-28 15:07:21,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:21,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:21,796 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 6 states. [2020-10-28 15:07:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:22,027 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2020-10-28 15:07:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:07:22,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 15:07:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:22,029 INFO L225 Difference]: With dead ends: 128 [2020-10-28 15:07:22,029 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 15:07:22,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 15:07:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2020-10-28 15:07:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 15:07:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 151 transitions. [2020-10-28 15:07:22,041 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 151 transitions. Word has length 22 [2020-10-28 15:07:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:22,042 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 151 transitions. [2020-10-28 15:07:22,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 151 transitions. [2020-10-28 15:07:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:07:22,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:22,043 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:22,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:07:22,043 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:22,044 INFO L82 PathProgramCache]: Analyzing trace with hash 744549402, now seen corresponding path program 4 times [2020-10-28 15:07:22,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:22,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750548868] [2020-10-28 15:07:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:22,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:22,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:07:22,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:22,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-28 15:07:22,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:22,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:07:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:22,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:07:22,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:23,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:23,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:23,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:23,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:23,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:23,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:23,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:23,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:23,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:23,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:23,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:23,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750548868] [2020-10-28 15:07:23,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:23,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:07:23,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008026320] [2020-10-28 15:07:23,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:07:23,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:23,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:07:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:23,079 INFO L87 Difference]: Start difference. First operand 108 states and 151 transitions. Second operand 8 states. [2020-10-28 15:07:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:23,595 INFO L93 Difference]: Finished difference Result 173 states and 256 transitions. [2020-10-28 15:07:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:23,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 15:07:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:23,597 INFO L225 Difference]: With dead ends: 173 [2020-10-28 15:07:23,597 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 15:07:23,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:07:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 15:07:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 139. [2020-10-28 15:07:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 15:07:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 194 transitions. [2020-10-28 15:07:23,612 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 194 transitions. Word has length 22 [2020-10-28 15:07:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:23,613 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 194 transitions. [2020-10-28 15:07:23,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:07:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 194 transitions. [2020-10-28 15:07:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:07:23,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:23,617 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:23,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:07:23,618 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1690443874, now seen corresponding path program 1 times [2020-10-28 15:07:23,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:23,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712629332] [2020-10-28 15:07:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:24,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:07:24,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:24,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-28 15:07:24,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:24,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:24,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:24,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:24,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:24,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:24,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:24,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:07:24,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:24,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:24,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:07:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712629332] [2020-10-28 15:07:24,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:24,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591545743] [2020-10-28 15:07:24,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:24,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:24,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:24,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:24,637 INFO L87 Difference]: Start difference. First operand 139 states and 194 transitions. Second operand 7 states. [2020-10-28 15:07:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:25,057 INFO L93 Difference]: Finished difference Result 176 states and 242 transitions. [2020-10-28 15:07:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:07:25,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-28 15:07:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:25,059 INFO L225 Difference]: With dead ends: 176 [2020-10-28 15:07:25,059 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 15:07:25,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:07:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 15:07:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2020-10-28 15:07:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 15:07:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 183 transitions. [2020-10-28 15:07:25,070 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 183 transitions. Word has length 23 [2020-10-28 15:07:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:25,071 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 183 transitions. [2020-10-28 15:07:25,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 183 transitions. [2020-10-28 15:07:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:07:25,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:25,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:25,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:07:25,072 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash -646946800, now seen corresponding path program 3 times [2020-10-28 15:07:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:25,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261326658] [2020-10-28 15:07:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:25,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:25,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:07:25,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:25,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-28 15:07:25,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:25,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:07:25,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:25,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:25,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:25,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:25,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:25,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:25,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:25,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:25,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:07:25,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261326658] [2020-10-28 15:07:25,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:25,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:07:25,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251295901] [2020-10-28 15:07:25,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:25,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:25,786 INFO L87 Difference]: Start difference. First operand 133 states and 183 transitions. Second operand 5 states. [2020-10-28 15:07:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:26,012 INFO L93 Difference]: Finished difference Result 150 states and 204 transitions. [2020-10-28 15:07:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:07:26,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 15:07:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:26,014 INFO L225 Difference]: With dead ends: 150 [2020-10-28 15:07:26,014 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 15:07:26,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 15:07:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2020-10-28 15:07:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 15:07:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 157 transitions. [2020-10-28 15:07:26,029 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 157 transitions. Word has length 23 [2020-10-28 15:07:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:26,029 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 157 transitions. [2020-10-28 15:07:26,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 157 transitions. [2020-10-28 15:07:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:07:26,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:26,030 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:26,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:07:26,031 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 933108510, now seen corresponding path program 5 times [2020-10-28 15:07:26,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:26,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105128034] [2020-10-28 15:07:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:26,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:27,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:27,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:07:27,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:27,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-28 15:07:27,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:27,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:27,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:07:27,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:27,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:07:27,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:29,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:29,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:29,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:29,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:29,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:07:29,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:29,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:29,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:29,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105128034] [2020-10-28 15:07:29,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:29,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:07:29,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527018769] [2020-10-28 15:07:29,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:07:29,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:29,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:07:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=128, Unknown=1, NotChecked=0, Total=156 [2020-10-28 15:07:29,624 INFO L87 Difference]: Start difference. First operand 115 states and 157 transitions. Second operand 13 states. [2020-10-28 15:07:30,122 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-28 15:07:30,487 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-28 15:07:30,727 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-28 15:07:30,878 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-28 15:07:31,311 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-28 15:07:31,470 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-28 15:07:31,932 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-28 15:07:32,191 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-28 15:07:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:32,541 INFO L93 Difference]: Finished difference Result 134 states and 180 transitions. [2020-10-28 15:07:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:07:32,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-28 15:07:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:32,543 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:07:32,543 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 15:07:32,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=183, Invalid=808, Unknown=1, NotChecked=0, Total=992 [2020-10-28 15:07:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 15:07:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2020-10-28 15:07:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 15:07:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 159 transitions. [2020-10-28 15:07:32,568 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 159 transitions. Word has length 23 [2020-10-28 15:07:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:32,568 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 159 transitions. [2020-10-28 15:07:32,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:07:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 159 transitions. [2020-10-28 15:07:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:07:32,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:32,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:32,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:07:32,570 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash -446666183, now seen corresponding path program 1 times [2020-10-28 15:07:32,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:32,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702254885] [2020-10-28 15:07:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:32,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:34,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:34,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:34,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1550 [2020-10-28 15:07:34,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:34,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:34,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:07:34,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:34,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:34,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:34,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:34,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:34,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:34,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:34,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:34,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:34,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:34,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:34,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:34,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:34,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:07:34,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702254885] [2020-10-28 15:07:34,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:34,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:07:34,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753467232] [2020-10-28 15:07:34,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:07:34,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:34,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:07:34,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:07:34,397 INFO L87 Difference]: Start difference. First operand 116 states and 159 transitions. Second operand 10 states. [2020-10-28 15:07:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:35,125 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-10-28 15:07:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:07:35,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-28 15:07:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:35,127 INFO L225 Difference]: With dead ends: 136 [2020-10-28 15:07:35,127 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 15:07:35,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:07:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 15:07:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 15:07:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 15:07:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 136 transitions. [2020-10-28 15:07:35,138 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 136 transitions. Word has length 24 [2020-10-28 15:07:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:35,138 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 136 transitions. [2020-10-28 15:07:35,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:07:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 136 transitions. [2020-10-28 15:07:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:07:35,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:35,139 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:35,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:07:35,140 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1811493734, now seen corresponding path program 6 times [2020-10-28 15:07:35,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:35,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179159840] [2020-10-28 15:07:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:35,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:36,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:36,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:36,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-28 15:07:36,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:36,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:36,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:07:36,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:36,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:07:36,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:37,074 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-28 15:07:37,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:37,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:37,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:37,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:37,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:37,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:37,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:37,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:37,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:37,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:37,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:37,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:37,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179159840] [2020-10-28 15:07:37,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:37,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:07:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317854876] [2020-10-28 15:07:37,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:07:37,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:07:37,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:07:37,303 INFO L87 Difference]: Start difference. First operand 98 states and 136 transitions. Second operand 14 states. [2020-10-28 15:07:37,954 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-28 15:07:40,557 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-28 15:07:41,027 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-28 15:07:41,676 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-28 15:07:44,155 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-28 15:07:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:44,414 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2020-10-28 15:07:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:07:44,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-28 15:07:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:44,416 INFO L225 Difference]: With dead ends: 113 [2020-10-28 15:07:44,416 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 15:07:44,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:07:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 15:07:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-28 15:07:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 15:07:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 138 transitions. [2020-10-28 15:07:44,429 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 138 transitions. Word has length 24 [2020-10-28 15:07:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:44,430 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 138 transitions. [2020-10-28 15:07:44,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:07:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 138 transitions. [2020-10-28 15:07:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:07:44,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:44,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:44,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:07:44,431 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2145281168, now seen corresponding path program 2 times [2020-10-28 15:07:44,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:44,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775627919] [2020-10-28 15:07:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:44,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:45,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:07:45,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 737 [2020-10-28 15:07:45,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:45,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:45,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:45,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:07:45,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:45,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:45,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:45,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:45,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:45,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:45,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:45,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:07:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775627919] [2020-10-28 15:07:45,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:45,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:45,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092685305] [2020-10-28 15:07:45,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:45,273 INFO L87 Difference]: Start difference. First operand 99 states and 138 transitions. Second operand 6 states. [2020-10-28 15:07:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:45,668 INFO L93 Difference]: Finished difference Result 169 states and 242 transitions. [2020-10-28 15:07:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:07:45,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 15:07:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:45,671 INFO L225 Difference]: With dead ends: 169 [2020-10-28 15:07:45,671 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 15:07:45,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:07:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 15:07:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 104. [2020-10-28 15:07:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 15:07:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 146 transitions. [2020-10-28 15:07:45,686 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 146 transitions. Word has length 25 [2020-10-28 15:07:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:45,686 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 146 transitions. [2020-10-28 15:07:45,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 146 transitions. [2020-10-28 15:07:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:07:45,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:45,687 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:45,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:07:45,687 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -994817378, now seen corresponding path program 7 times [2020-10-28 15:07:45,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:45,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422780438] [2020-10-28 15:07:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:45,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:46,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:46,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:47,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:47,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:07:47,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:47,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-10-28 15:07:47,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:47,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:47,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:07:47,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:47,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:07:47,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:47,920 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-10-28 15:07:48,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:48,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:48,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:48,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:48,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:48,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:48,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:48,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:48,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:48,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:48,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:48,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422780438] [2020-10-28 15:07:48,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:48,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:07:48,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483220740] [2020-10-28 15:07:48,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:07:48,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:48,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:07:48,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:07:48,117 INFO L87 Difference]: Start difference. First operand 104 states and 146 transitions. Second operand 15 states. [2020-10-28 15:07:48,584 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 15:07:48,840 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 15:07:49,397 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 15:07:50,104 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-28 15:07:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:50,321 INFO L93 Difference]: Finished difference Result 121 states and 164 transitions. [2020-10-28 15:07:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:07:50,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-28 15:07:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:50,324 INFO L225 Difference]: With dead ends: 121 [2020-10-28 15:07:50,324 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 15:07:50,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:07:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 15:07:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-10-28 15:07:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 15:07:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2020-10-28 15:07:50,338 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 25 [2020-10-28 15:07:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:50,339 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2020-10-28 15:07:50,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:07:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2020-10-28 15:07:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:50,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:50,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:50,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:07:50,340 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:50,341 INFO L82 PathProgramCache]: Analyzing trace with hash 143970281, now seen corresponding path program 2 times [2020-10-28 15:07:50,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:50,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149189127] [2020-10-28 15:07:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:51,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:51,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:51,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:51,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1498 [2020-10-28 15:07:51,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:51,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:07:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:07:51,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:51,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:51,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:51,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:51,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:51,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:51,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:51,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:51,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:51,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:51,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:07:51,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149189127] [2020-10-28 15:07:51,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:51,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613049794] [2020-10-28 15:07:51,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:51,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:51,957 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand 6 states. [2020-10-28 15:07:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:52,376 INFO L93 Difference]: Finished difference Result 141 states and 199 transitions. [2020-10-28 15:07:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:52,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 15:07:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:52,378 INFO L225 Difference]: With dead ends: 141 [2020-10-28 15:07:52,378 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 15:07:52,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 15:07:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2020-10-28 15:07:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 15:07:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2020-10-28 15:07:52,392 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 26 [2020-10-28 15:07:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:52,392 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2020-10-28 15:07:52,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2020-10-28 15:07:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:52,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:52,393 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:52,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:07:52,393 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash -767097988, now seen corresponding path program 1 times [2020-10-28 15:07:52,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:52,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101989612] [2020-10-28 15:07:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:52,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:53,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:53,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:07:53,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-28 15:07:53,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:53,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:07:53,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:07:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:53,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:53,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:53,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:53,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:53,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:53,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:07:53,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101989612] [2020-10-28 15:07:53,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:53,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:53,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785529927] [2020-10-28 15:07:53,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:53,245 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand 5 states. [2020-10-28 15:07:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:53,444 INFO L93 Difference]: Finished difference Result 129 states and 177 transitions. [2020-10-28 15:07:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:53,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-28 15:07:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:53,446 INFO L225 Difference]: With dead ends: 129 [2020-10-28 15:07:53,446 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 15:07:53,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 15:07:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2020-10-28 15:07:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 15:07:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2020-10-28 15:07:53,462 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 26 [2020-10-28 15:07:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:53,462 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2020-10-28 15:07:53,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2020-10-28 15:07:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:53,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:53,463 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:53,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:07:53,463 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1447654118, now seen corresponding path program 8 times [2020-10-28 15:07:53,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:53,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536566984] [2020-10-28 15:07:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:53,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:53,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:55,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:55,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:55,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:55,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-28 15:07:55,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:55,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:07:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:07:55,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:56,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:56,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:56,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:56,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:56,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:56,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:56,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:56,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:56,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:56,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:56,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:56,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536566984] [2020-10-28 15:07:56,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:56,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:07:56,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889011689] [2020-10-28 15:07:56,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:07:56,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:07:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:07:56,282 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 16 states. [2020-10-28 15:07:56,956 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-28 15:07:57,169 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-28 15:07:57,412 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-28 15:07:57,663 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-28 15:07:57,930 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-28 15:07:58,192 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2020-10-28 15:07:58,470 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2020-10-28 15:07:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:58,767 INFO L93 Difference]: Finished difference Result 133 states and 179 transitions. [2020-10-28 15:07:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:07:58,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-28 15:07:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:58,772 INFO L225 Difference]: With dead ends: 133 [2020-10-28 15:07:58,772 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 15:07:58,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:07:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 15:07:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2020-10-28 15:07:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 15:07:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2020-10-28 15:07:58,799 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 26 [2020-10-28 15:07:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:58,799 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2020-10-28 15:07:58,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:07:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2020-10-28 15:07:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:58,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:58,800 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:58,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:07:58,800 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash 735809439, now seen corresponding path program 3 times [2020-10-28 15:07:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:58,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219256861] [2020-10-28 15:07:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:00,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:00,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:08:00,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:08:00,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1205 [2020-10-28 15:08:00,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:00,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:00,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:00,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:08:00,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:00,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:00,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:00,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:00,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:00,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:00,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:00,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:00,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:00,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:00,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:00,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:00,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:08:00,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219256861] [2020-10-28 15:08:00,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:00,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:00,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574145176] [2020-10-28 15:08:00,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:00,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:00,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:00,246 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand 9 states. [2020-10-28 15:08:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:00,894 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2020-10-28 15:08:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:00,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 15:08:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:00,897 INFO L225 Difference]: With dead ends: 151 [2020-10-28 15:08:00,897 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 15:08:00,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:08:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 15:08:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 121. [2020-10-28 15:08:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 15:08:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-10-28 15:08:00,911 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 27 [2020-10-28 15:08:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:00,912 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-10-28 15:08:00,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-10-28 15:08:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:08:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:00,912 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:00,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:08:00,913 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1966430719, now seen corresponding path program 3 times [2020-10-28 15:08:00,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667226619] [2020-10-28 15:08:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:00,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:00,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:01,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:08:01,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:08:01,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-28 15:08:01,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:01,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:01,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:01,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:08:01,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:08:01,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:02,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:02,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:02,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:02,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:02,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:02,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:02,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:02,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:02,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:02,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:08:02,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667226619] [2020-10-28 15:08:02,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:02,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:02,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663817913] [2020-10-28 15:08:02,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:02,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:02,123 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 9 states. [2020-10-28 15:08:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:03,096 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2020-10-28 15:08:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:08:03,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 15:08:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:03,098 INFO L225 Difference]: With dead ends: 168 [2020-10-28 15:08:03,098 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 15:08:03,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:08:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 15:08:03,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2020-10-28 15:08:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 15:08:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2020-10-28 15:08:03,111 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 27 [2020-10-28 15:08:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:03,112 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2020-10-28 15:08:03,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2020-10-28 15:08:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:08:03,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:03,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:03,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:08:03,116 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:03,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1531292913, now seen corresponding path program 1 times [2020-10-28 15:08:03,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:03,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104766658] [2020-10-28 15:08:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:03,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:03,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:03,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:03,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:03,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:04,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1263 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:08:04,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:04,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:08:04,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104766658] [2020-10-28 15:08:04,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:04,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:04,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103686912] [2020-10-28 15:08:04,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:04,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:04,551 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand 9 states. [2020-10-28 15:08:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:05,286 INFO L93 Difference]: Finished difference Result 146 states and 200 transitions. [2020-10-28 15:08:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:05,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 15:08:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:05,287 INFO L225 Difference]: With dead ends: 146 [2020-10-28 15:08:05,288 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 15:08:05,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:08:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 15:08:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 118. [2020-10-28 15:08:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 15:08:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2020-10-28 15:08:05,301 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 27 [2020-10-28 15:08:05,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:05,301 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2020-10-28 15:08:05,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2020-10-28 15:08:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:08:05,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:05,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:05,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:08:05,302 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1399521937, now seen corresponding path program 2 times [2020-10-28 15:08:05,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:05,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357688216] [2020-10-28 15:08:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:05,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:05,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:05,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:06,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:06,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:08:06,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:06,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1356 [2020-10-28 15:08:06,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:06,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:08:06,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:06,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:06,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:06,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:06,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:06,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:06,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:06,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:06,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:06,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:06,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:06,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:06,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:08:06,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357688216] [2020-10-28 15:08:06,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:06,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:08:06,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732475639] [2020-10-28 15:08:06,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:08:06,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:06,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:08:06,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:06,774 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand 7 states. [2020-10-28 15:08:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:07,394 INFO L93 Difference]: Finished difference Result 215 states and 306 transitions. [2020-10-28 15:08:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:08:07,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 15:08:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:07,395 INFO L225 Difference]: With dead ends: 215 [2020-10-28 15:08:07,395 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 15:08:07,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 15:08:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 123. [2020-10-28 15:08:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 15:08:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2020-10-28 15:08:07,411 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 27 [2020-10-28 15:08:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:07,411 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2020-10-28 15:08:07,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:08:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2020-10-28 15:08:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:08:07,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:07,413 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:07,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:08:07,413 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:07,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:07,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1235863619, now seen corresponding path program 4 times [2020-10-28 15:08:07,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:07,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983880290] [2020-10-28 15:08:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:07,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:07,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:07,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:07,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:08,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:08,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:08:08,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:08,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-28 15:08:08,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:08,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:08:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:08:08,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:08,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:08,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:08,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:08,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:08,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:08,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:08,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:08,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:08,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:08,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:08,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:08:08,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983880290] [2020-10-28 15:08:08,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:08,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:08,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189446499] [2020-10-28 15:08:08,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:08,784 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand 9 states. [2020-10-28 15:08:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:09,460 INFO L93 Difference]: Finished difference Result 223 states and 322 transitions. [2020-10-28 15:08:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:08:09,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 15:08:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:09,463 INFO L225 Difference]: With dead ends: 223 [2020-10-28 15:08:09,463 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 15:08:09,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 15:08:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 139. [2020-10-28 15:08:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 15:08:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 194 transitions. [2020-10-28 15:08:09,481 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 194 transitions. Word has length 27 [2020-10-28 15:08:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:09,482 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 194 transitions. [2020-10-28 15:08:09,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 194 transitions. [2020-10-28 15:08:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:08:09,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:09,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:09,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:08:09,483 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:09,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:09,483 INFO L82 PathProgramCache]: Analyzing trace with hash -986532870, now seen corresponding path program 5 times [2020-10-28 15:08:09,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:09,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678507578] [2020-10-28 15:08:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:09,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:08:09,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:08:09,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:09,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:09,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:09,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:09,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:09,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:09,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:09,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:09,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:09,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:08:09,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678507578] [2020-10-28 15:08:09,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:09,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:08:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733067123] [2020-10-28 15:08:09,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:08:09,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:08:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:08:09,688 INFO L87 Difference]: Start difference. First operand 139 states and 194 transitions. Second operand 6 states. [2020-10-28 15:08:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:10,159 INFO L93 Difference]: Finished difference Result 232 states and 324 transitions. [2020-10-28 15:08:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:08:10,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-28 15:08:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:10,162 INFO L225 Difference]: With dead ends: 232 [2020-10-28 15:08:10,162 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 15:08:10,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:08:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 15:08:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 147. [2020-10-28 15:08:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 15:08:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 201 transitions. [2020-10-28 15:08:10,182 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 201 transitions. Word has length 28 [2020-10-28 15:08:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:10,182 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 201 transitions. [2020-10-28 15:08:10,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:08:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 201 transitions. [2020-10-28 15:08:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:08:10,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:10,184 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:10,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:08:10,185 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 342257977, now seen corresponding path program 6 times [2020-10-28 15:08:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:10,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619918175] [2020-10-28 15:08:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:10,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:12,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:08:12,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:08:12,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1925 [2020-10-28 15:08:12,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:12,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:12,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:12,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:08:12,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:12,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:12,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:12,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:12,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:12,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:12,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:12,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:12,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:12,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:08:12,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619918175] [2020-10-28 15:08:12,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:12,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:12,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725172471] [2020-10-28 15:08:12,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:12,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:12,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:12,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:12,373 INFO L87 Difference]: Start difference. First operand 147 states and 201 transitions. Second operand 10 states. [2020-10-28 15:08:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:15,086 INFO L93 Difference]: Finished difference Result 184 states and 248 transitions. [2020-10-28 15:08:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:15,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 15:08:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:15,087 INFO L225 Difference]: With dead ends: 184 [2020-10-28 15:08:15,088 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 15:08:15,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:08:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 15:08:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 144. [2020-10-28 15:08:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 15:08:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 193 transitions. [2020-10-28 15:08:15,107 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 193 transitions. Word has length 28 [2020-10-28 15:08:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:15,107 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 193 transitions. [2020-10-28 15:08:15,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 193 transitions. [2020-10-28 15:08:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:08:15,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:15,108 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:15,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:08:15,108 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 807397420, now seen corresponding path program 3 times [2020-10-28 15:08:15,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:15,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595078393] [2020-10-28 15:08:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:15,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:15,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:15,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:15,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:15,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:15,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:16,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:18,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:18,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:08:18,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:08:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3258 [2020-10-28 15:08:18,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:18,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:08:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:08:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:08:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:18,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:18,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:18,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:18,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:18,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:18,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:18,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:18,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:18,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:08:18,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595078393] [2020-10-28 15:08:18,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:18,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:08:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255853353] [2020-10-28 15:08:18,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:08:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:08:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:08:18,497 INFO L87 Difference]: Start difference. First operand 144 states and 193 transitions. Second operand 8 states. [2020-10-28 15:08:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:19,133 INFO L93 Difference]: Finished difference Result 299 states and 430 transitions. [2020-10-28 15:08:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:08:19,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 15:08:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:19,136 INFO L225 Difference]: With dead ends: 299 [2020-10-28 15:08:19,136 INFO L226 Difference]: Without dead ends: 253 [2020-10-28 15:08:19,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-28 15:08:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 161. [2020-10-28 15:08:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 15:08:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2020-10-28 15:08:19,155 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 28 [2020-10-28 15:08:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:19,155 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2020-10-28 15:08:19,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:08:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2020-10-28 15:08:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:08:19,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:19,157 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:19,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:08:19,157 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1674693433, now seen corresponding path program 7 times [2020-10-28 15:08:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:19,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563477626] [2020-10-28 15:08:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:19,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:20,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:20,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:08:20,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:20,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1741 [2020-10-28 15:08:20,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:20,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:08:20,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:20,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:08:20,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:21,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:21,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:21,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:21,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:08:21,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563477626] [2020-10-28 15:08:21,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:21,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:21,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889835641] [2020-10-28 15:08:21,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:21,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:21,075 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 10 states. [2020-10-28 15:08:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:21,989 INFO L93 Difference]: Finished difference Result 290 states and 398 transitions. [2020-10-28 15:08:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:21,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 15:08:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:21,991 INFO L225 Difference]: With dead ends: 290 [2020-10-28 15:08:21,992 INFO L226 Difference]: Without dead ends: 248 [2020-10-28 15:08:21,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:08:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-28 15:08:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 177. [2020-10-28 15:08:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-28 15:08:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 230 transitions. [2020-10-28 15:08:22,020 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 230 transitions. Word has length 28 [2020-10-28 15:08:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:22,020 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 230 transitions. [2020-10-28 15:08:22,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 230 transitions. [2020-10-28 15:08:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:08:22,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:22,021 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:22,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:08:22,022 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1707206577, now seen corresponding path program 8 times [2020-10-28 15:08:22,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:22,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041267881] [2020-10-28 15:08:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:22,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:08:22,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:08:22,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-28 15:08:22,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:22,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:22,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:22,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:08:22,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:22,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:23,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:23,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:23,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:08:23,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041267881] [2020-10-28 15:08:23,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:23,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:08:23,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660076475] [2020-10-28 15:08:23,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:08:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:08:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:23,059 INFO L87 Difference]: Start difference. First operand 177 states and 230 transitions. Second operand 7 states. [2020-10-28 15:08:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:23,699 INFO L93 Difference]: Finished difference Result 315 states and 423 transitions. [2020-10-28 15:08:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:23,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-28 15:08:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:23,701 INFO L225 Difference]: With dead ends: 315 [2020-10-28 15:08:23,701 INFO L226 Difference]: Without dead ends: 299 [2020-10-28 15:08:23,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:08:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-28 15:08:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 245. [2020-10-28 15:08:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-28 15:08:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 330 transitions. [2020-10-28 15:08:23,728 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 330 transitions. Word has length 29 [2020-10-28 15:08:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:23,729 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 330 transitions. [2020-10-28 15:08:23,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:08:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 330 transitions. [2020-10-28 15:08:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:08:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:23,730 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:23,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:08:23,730 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 502420751, now seen corresponding path program 4 times [2020-10-28 15:08:23,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:23,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952280463] [2020-10-28 15:08:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:23,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:23,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:23,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:23,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:23,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:28,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:08:28,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:08:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:08:28,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:28,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:28,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:28,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:08:28,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:08:28,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:28,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:28,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:28,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:28,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:28,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:28,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:28,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:08:28,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952280463] [2020-10-28 15:08:28,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:28,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:28,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910812570] [2020-10-28 15:08:28,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:28,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:28,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:28,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:28,907 INFO L87 Difference]: Start difference. First operand 245 states and 330 transitions. Second operand 9 states. [2020-10-28 15:08:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:29,825 INFO L93 Difference]: Finished difference Result 460 states and 668 transitions. [2020-10-28 15:08:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:08:29,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-28 15:08:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:29,828 INFO L225 Difference]: With dead ends: 460 [2020-10-28 15:08:29,828 INFO L226 Difference]: Without dead ends: 406 [2020-10-28 15:08:29,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-28 15:08:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 276. [2020-10-28 15:08:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 15:08:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 367 transitions. [2020-10-28 15:08:29,857 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 367 transitions. Word has length 29 [2020-10-28 15:08:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:29,857 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 367 transitions. [2020-10-28 15:08:29,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 367 transitions. [2020-10-28 15:08:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:08:29,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:29,858 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:29,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:08:29,859 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash -147012769, now seen corresponding path program 2 times [2020-10-28 15:08:29,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:29,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013158606] [2020-10-28 15:08:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:30,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:08:30,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:30,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-28 15:08:30,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:30,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:08:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:30,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:31,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:31,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:31,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:31,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:31,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:31,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:31,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:08:31,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013158606] [2020-10-28 15:08:31,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:31,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:31,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892148483] [2020-10-28 15:08:31,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:31,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:31,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:31,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:31,192 INFO L87 Difference]: Start difference. First operand 276 states and 367 transitions. Second operand 10 states. [2020-10-28 15:08:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:32,028 INFO L93 Difference]: Finished difference Result 308 states and 406 transitions. [2020-10-28 15:08:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:08:32,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 15:08:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:32,030 INFO L225 Difference]: With dead ends: 308 [2020-10-28 15:08:32,030 INFO L226 Difference]: Without dead ends: 296 [2020-10-28 15:08:32,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:08:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-28 15:08:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2020-10-28 15:08:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-28 15:08:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 378 transitions. [2020-10-28 15:08:32,061 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 378 transitions. Word has length 29 [2020-10-28 15:08:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:32,061 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 378 transitions. [2020-10-28 15:08:32,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 378 transitions. [2020-10-28 15:08:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:08:32,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:32,062 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:32,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:08:32,062 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1707648829, now seen corresponding path program 9 times [2020-10-28 15:08:32,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:32,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876480690] [2020-10-28 15:08:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:32,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:32,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:08:33,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-28 15:08:33,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:08:33,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:33,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:08:33,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:33,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:33,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:33,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:33,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:33,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:33,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:08:33,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876480690] [2020-10-28 15:08:33,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:33,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:08:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065206261] [2020-10-28 15:08:33,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:08:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:08:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:08:33,265 INFO L87 Difference]: Start difference. First operand 286 states and 378 transitions. Second operand 11 states. [2020-10-28 15:08:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:34,257 INFO L93 Difference]: Finished difference Result 466 states and 650 transitions. [2020-10-28 15:08:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:08:34,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 15:08:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:34,261 INFO L225 Difference]: With dead ends: 466 [2020-10-28 15:08:34,261 INFO L226 Difference]: Without dead ends: 403 [2020-10-28 15:08:34,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:08:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-28 15:08:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 308. [2020-10-28 15:08:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-28 15:08:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 412 transitions. [2020-10-28 15:08:34,300 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 412 transitions. Word has length 29 [2020-10-28 15:08:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:34,300 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 412 transitions. [2020-10-28 15:08:34,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:08:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 412 transitions. [2020-10-28 15:08:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:34,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:34,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:34,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:08:34,302 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:34,302 INFO L82 PathProgramCache]: Analyzing trace with hash 352910074, now seen corresponding path program 10 times [2020-10-28 15:08:34,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:34,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465820654] [2020-10-28 15:08:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:34,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:35,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:35,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:08:35,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:35,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:35,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:35,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:35,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:35,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:35,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:35,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:35,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:35,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:08:35,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465820654] [2020-10-28 15:08:35,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:35,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:35,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860299852] [2020-10-28 15:08:35,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:35,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:35,912 INFO L87 Difference]: Start difference. First operand 308 states and 412 transitions. Second operand 13 states. [2020-10-28 15:08:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:43,622 INFO L93 Difference]: Finished difference Result 326 states and 431 transitions. [2020-10-28 15:08:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:08:43,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-28 15:08:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:43,624 INFO L225 Difference]: With dead ends: 326 [2020-10-28 15:08:43,624 INFO L226 Difference]: Without dead ends: 297 [2020-10-28 15:08:43,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=118, Invalid=583, Unknown=1, NotChecked=0, Total=702 [2020-10-28 15:08:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-28 15:08:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2020-10-28 15:08:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-28 15:08:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 400 transitions. [2020-10-28 15:08:43,651 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 400 transitions. Word has length 30 [2020-10-28 15:08:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:43,651 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 400 transitions. [2020-10-28 15:08:43,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 400 transitions. [2020-10-28 15:08:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:43,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:43,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:43,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:08:43,652 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:43,653 INFO L82 PathProgramCache]: Analyzing trace with hash -816098311, now seen corresponding path program 11 times [2020-10-28 15:08:43,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:43,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483272862] [2020-10-28 15:08:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:43,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:43,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:43,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:43,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:45,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:45,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1360 [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:08:45,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:45,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:45,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:45,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:45,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:45,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:45,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:45,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:45,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:45,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:45,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:45,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:08:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483272862] [2020-10-28 15:08:45,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:45,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:45,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796176318] [2020-10-28 15:08:45,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:45,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:45,171 INFO L87 Difference]: Start difference. First operand 297 states and 400 transitions. Second operand 9 states. [2020-10-28 15:08:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:45,759 INFO L93 Difference]: Finished difference Result 320 states and 429 transitions. [2020-10-28 15:08:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:08:45,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-28 15:08:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:45,762 INFO L225 Difference]: With dead ends: 320 [2020-10-28 15:08:45,762 INFO L226 Difference]: Without dead ends: 302 [2020-10-28 15:08:45,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-28 15:08:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 289. [2020-10-28 15:08:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-28 15:08:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 391 transitions. [2020-10-28 15:08:45,799 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 391 transitions. Word has length 30 [2020-10-28 15:08:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:45,799 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 391 transitions. [2020-10-28 15:08:45,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 391 transitions. [2020-10-28 15:08:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:45,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:45,801 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:45,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:08:45,801 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1185830924, now seen corresponding path program 3 times [2020-10-28 15:08:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:45,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533548727] [2020-10-28 15:08:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:45,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:45,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:45,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:47,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:47,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:47,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:47,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1232 [2020-10-28 15:08:47,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:47,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:47,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:08:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:08:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:47,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:47,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:47,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:47,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:08:47,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533548727] [2020-10-28 15:08:47,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:47,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:47,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868354773] [2020-10-28 15:08:47,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:47,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:47,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:47,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:47,270 INFO L87 Difference]: Start difference. First operand 289 states and 391 transitions. Second operand 10 states. [2020-10-28 15:08:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:47,930 INFO L93 Difference]: Finished difference Result 347 states and 450 transitions. [2020-10-28 15:08:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:47,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 15:08:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:47,936 INFO L225 Difference]: With dead ends: 347 [2020-10-28 15:08:47,937 INFO L226 Difference]: Without dead ends: 330 [2020-10-28 15:08:47,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:08:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-28 15:08:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 289. [2020-10-28 15:08:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-28 15:08:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 381 transitions. [2020-10-28 15:08:47,971 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 381 transitions. Word has length 30 [2020-10-28 15:08:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:47,972 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 381 transitions. [2020-10-28 15:08:47,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 381 transitions. [2020-10-28 15:08:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:47,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:47,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:47,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:08:47,973 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 305269481, now seen corresponding path program 12 times [2020-10-28 15:08:47,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:47,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680191267] [2020-10-28 15:08:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:49,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:50,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2488 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:08:50,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:50,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:50,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:50,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:50,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 15:08:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680191267] [2020-10-28 15:08:50,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:50,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:50,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24127125] [2020-10-28 15:08:50,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:50,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:50,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:50,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:50,637 INFO L87 Difference]: Start difference. First operand 289 states and 381 transitions. Second operand 9 states. [2020-10-28 15:08:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:51,352 INFO L93 Difference]: Finished difference Result 548 states and 750 transitions. [2020-10-28 15:08:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:08:51,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-28 15:08:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:51,355 INFO L225 Difference]: With dead ends: 548 [2020-10-28 15:08:51,356 INFO L226 Difference]: Without dead ends: 521 [2020-10-28 15:08:51,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-28 15:08:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 450. [2020-10-28 15:08:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-28 15:08:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 565 transitions. [2020-10-28 15:08:51,396 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 565 transitions. Word has length 30 [2020-10-28 15:08:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:51,396 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 565 transitions. [2020-10-28 15:08:51,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 565 transitions. [2020-10-28 15:08:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:51,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:51,398 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:51,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:08:51,398 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:51,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1565701191, now seen corresponding path program 13 times [2020-10-28 15:08:51,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:51,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450122153] [2020-10-28 15:08:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:51,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:52,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:52,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:52,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:52,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:52,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1543 [2020-10-28 15:08:52,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:52,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:52,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:08:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:08:52,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:53,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:53,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:53,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:53,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:53,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:53,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:53,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:53,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:53,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:53,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:08:53,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450122153] [2020-10-28 15:08:53,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:53,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:08:53,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122148078] [2020-10-28 15:08:53,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:08:53,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:08:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:08:53,174 INFO L87 Difference]: Start difference. First operand 450 states and 565 transitions. Second operand 12 states. [2020-10-28 15:08:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:54,451 INFO L93 Difference]: Finished difference Result 671 states and 885 transitions. [2020-10-28 15:08:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:08:54,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 15:08:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:54,455 INFO L225 Difference]: With dead ends: 671 [2020-10-28 15:08:54,455 INFO L226 Difference]: Without dead ends: 584 [2020-10-28 15:08:54,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:08:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-10-28 15:08:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 477. [2020-10-28 15:08:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-28 15:08:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 604 transitions. [2020-10-28 15:08:54,497 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 604 transitions. Word has length 30 [2020-10-28 15:08:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:54,498 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 604 transitions. [2020-10-28 15:08:54,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:08:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 604 transitions. [2020-10-28 15:08:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:54,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:54,499 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:54,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:08:54,500 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash 39663293, now seen corresponding path program 14 times [2020-10-28 15:08:54,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:54,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025285897] [2020-10-28 15:08:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:54,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:55,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:55,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:55,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-28 15:08:55,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:55,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:55,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:08:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:55,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:56,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:56,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:56,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:56,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:56,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:56,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:56,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:56,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:56,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:08:56,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025285897] [2020-10-28 15:08:56,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:56,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:56,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279376743] [2020-10-28 15:08:56,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:56,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:56,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:56,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:56,014 INFO L87 Difference]: Start difference. First operand 477 states and 604 transitions. Second operand 13 states. [2020-10-28 15:08:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:57,500 INFO L93 Difference]: Finished difference Result 707 states and 942 transitions. [2020-10-28 15:08:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:57,501 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 15:08:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:57,505 INFO L225 Difference]: With dead ends: 707 [2020-10-28 15:08:57,505 INFO L226 Difference]: Without dead ends: 620 [2020-10-28 15:08:57,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:08:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-28 15:08:57,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 504. [2020-10-28 15:08:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-28 15:08:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 643 transitions. [2020-10-28 15:08:57,553 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 643 transitions. Word has length 31 [2020-10-28 15:08:57,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:57,554 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 643 transitions. [2020-10-28 15:08:57,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 643 transitions. [2020-10-28 15:08:57,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:08:57,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:57,555 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:57,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:08:57,555 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:57,556 INFO L82 PathProgramCache]: Analyzing trace with hash 658667577, now seen corresponding path program 15 times [2020-10-28 15:08:57,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:57,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031450896] [2020-10-28 15:08:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:57,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:00,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:00,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:09:00,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:09:00,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2984 [2020-10-28 15:09:00,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:00,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:09:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:09:00,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:00,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:00,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:00,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:00,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:00,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:00,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:00,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:00,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:00,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 15:09:00,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031450896] [2020-10-28 15:09:00,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:00,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:00,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423302666] [2020-10-28 15:09:00,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:00,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:00,746 INFO L87 Difference]: Start difference. First operand 504 states and 643 transitions. Second operand 10 states. [2020-10-28 15:09:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:01,705 INFO L93 Difference]: Finished difference Result 783 states and 1033 transitions. [2020-10-28 15:09:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:01,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-28 15:09:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:01,709 INFO L225 Difference]: With dead ends: 783 [2020-10-28 15:09:01,709 INFO L226 Difference]: Without dead ends: 752 [2020-10-28 15:09:01,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-10-28 15:09:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 600. [2020-10-28 15:09:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-28 15:09:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 758 transitions. [2020-10-28 15:09:01,761 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 758 transitions. Word has length 32 [2020-10-28 15:09:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:01,761 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 758 transitions. [2020-10-28 15:09:01,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 758 transitions. [2020-10-28 15:09:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:09:01,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:01,763 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:01,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:09:01,763 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1733645255, now seen corresponding path program 16 times [2020-10-28 15:09:01,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:01,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226550288] [2020-10-28 15:09:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:01,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:01,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:01,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:02,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:02,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:09:03,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1859 [2020-10-28 15:09:03,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:03,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:09:03,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:03,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:09:03,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:04,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:04,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:04,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:04,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:04,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:04,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:04,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:04,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:09:04,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226550288] [2020-10-28 15:09:04,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:04,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:09:04,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077632525] [2020-10-28 15:09:04,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:09:04,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:04,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:09:04,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:04,618 INFO L87 Difference]: Start difference. First operand 600 states and 758 transitions. Second operand 19 states. [2020-10-28 15:09:06,250 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-28 15:09:06,586 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-28 15:09:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:07,090 INFO L93 Difference]: Finished difference Result 652 states and 825 transitions. [2020-10-28 15:09:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:09:07,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-10-28 15:09:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:07,094 INFO L225 Difference]: With dead ends: 652 [2020-10-28 15:09:07,094 INFO L226 Difference]: Without dead ends: 614 [2020-10-28 15:09:07,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:09:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-10-28 15:09:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 604. [2020-10-28 15:09:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2020-10-28 15:09:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 763 transitions. [2020-10-28 15:09:07,149 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 763 transitions. Word has length 32 [2020-10-28 15:09:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:07,150 INFO L481 AbstractCegarLoop]: Abstraction has 604 states and 763 transitions. [2020-10-28 15:09:07,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:09:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 763 transitions. [2020-10-28 15:09:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:09:07,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:07,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:07,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:09:07,152 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash 416838174, now seen corresponding path program 17 times [2020-10-28 15:09:07,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:07,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649745643] [2020-10-28 15:09:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:07,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:07,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:07,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:08,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:09,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:09,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:09:09,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:09:09,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1915 [2020-10-28 15:09:09,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:09,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:09,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:09:09,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:09:09,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:09:09,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:09,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:09,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:09,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:09,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:09,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:09,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:09,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:09,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:09,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:09,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:09,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:09,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:09:09,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649745643] [2020-10-28 15:09:09,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:09,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:09:09,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652465707] [2020-10-28 15:09:09,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:09:09,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:09:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:09,440 INFO L87 Difference]: Start difference. First operand 604 states and 763 transitions. Second operand 12 states. [2020-10-28 15:09:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:12,325 INFO L93 Difference]: Finished difference Result 675 states and 838 transitions. [2020-10-28 15:09:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:09:12,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-28 15:09:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:12,329 INFO L225 Difference]: With dead ends: 675 [2020-10-28 15:09:12,329 INFO L226 Difference]: Without dead ends: 638 [2020-10-28 15:09:12,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:09:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-28 15:09:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 595. [2020-10-28 15:09:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-28 15:09:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 751 transitions. [2020-10-28 15:09:12,390 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 751 transitions. Word has length 33 [2020-10-28 15:09:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:12,390 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 751 transitions. [2020-10-28 15:09:12,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:09:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 751 transitions. [2020-10-28 15:09:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:09:12,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:12,392 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:12,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:09:12,393 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1028261342, now seen corresponding path program 4 times [2020-10-28 15:09:12,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:12,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278232004] [2020-10-28 15:09:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:12,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:12,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:12,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:12,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:17,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:17,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:09:17,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:09:17,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4875 [2020-10-28 15:09:17,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:17,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:09:17,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:09:17,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:17,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:17,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:17,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:17,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:17,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:17,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:17,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:17,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:09:17,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278232004] [2020-10-28 15:09:17,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:17,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:17,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104132988] [2020-10-28 15:09:17,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:17,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:17,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:17,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:17,521 INFO L87 Difference]: Start difference. First operand 595 states and 751 transitions. Second operand 11 states. [2020-10-28 15:09:18,402 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 15:09:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:19,538 INFO L93 Difference]: Finished difference Result 736 states and 902 transitions. [2020-10-28 15:09:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:09:19,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-28 15:09:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:19,541 INFO L225 Difference]: With dead ends: 736 [2020-10-28 15:09:19,541 INFO L226 Difference]: Without dead ends: 629 [2020-10-28 15:09:19,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:09:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-10-28 15:09:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 587. [2020-10-28 15:09:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-28 15:09:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 731 transitions. [2020-10-28 15:09:19,598 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 731 transitions. Word has length 33 [2020-10-28 15:09:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:19,599 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 731 transitions. [2020-10-28 15:09:19,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 731 transitions. [2020-10-28 15:09:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:09:19,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:19,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:19,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:09:19,601 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1374202401, now seen corresponding path program 18 times [2020-10-28 15:09:19,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:19,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716579945] [2020-10-28 15:09:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:20,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:21,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:09:21,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:09:21,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-28 15:09:21,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:21,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:21,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:21,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:21,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:09:21,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:21,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:21,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:09:21,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716579945] [2020-10-28 15:09:21,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:21,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894464592] [2020-10-28 15:09:21,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:21,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:21,683 INFO L87 Difference]: Start difference. First operand 587 states and 731 transitions. Second operand 10 states. [2020-10-28 15:09:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:22,581 INFO L93 Difference]: Finished difference Result 631 states and 774 transitions. [2020-10-28 15:09:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:22,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-28 15:09:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:22,585 INFO L225 Difference]: With dead ends: 631 [2020-10-28 15:09:22,585 INFO L226 Difference]: Without dead ends: 611 [2020-10-28 15:09:22,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:09:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-10-28 15:09:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 580. [2020-10-28 15:09:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-28 15:09:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 723 transitions. [2020-10-28 15:09:22,632 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 723 transitions. Word has length 33 [2020-10-28 15:09:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:22,633 INFO L481 AbstractCegarLoop]: Abstraction has 580 states and 723 transitions. [2020-10-28 15:09:22,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 723 transitions. [2020-10-28 15:09:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:09:22,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:22,635 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:22,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:09:22,635 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash -871635395, now seen corresponding path program 19 times [2020-10-28 15:09:22,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:22,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451856838] [2020-10-28 15:09:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:25,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:09:25,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:25,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2354 [2020-10-28 15:09:25,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:25,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:25,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:09:25,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:25,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:09:25,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:25,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:25,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:25,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:25,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:25,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:25,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:09:25,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451856838] [2020-10-28 15:09:25,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:26,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:09:26,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004214913] [2020-10-28 15:09:26,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:09:26,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:09:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:09:26,001 INFO L87 Difference]: Start difference. First operand 580 states and 723 transitions. Second operand 20 states. [2020-10-28 15:09:27,586 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-28 15:09:27,811 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-28 15:09:28,001 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 15:09:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:28,337 INFO L93 Difference]: Finished difference Result 631 states and 788 transitions. [2020-10-28 15:09:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:09:28,338 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-10-28 15:09:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:28,342 INFO L225 Difference]: With dead ends: 631 [2020-10-28 15:09:28,342 INFO L226 Difference]: Without dead ends: 594 [2020-10-28 15:09:28,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:09:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-10-28 15:09:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 581. [2020-10-28 15:09:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-28 15:09:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 725 transitions. [2020-10-28 15:09:28,380 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 725 transitions. Word has length 33 [2020-10-28 15:09:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:28,380 INFO L481 AbstractCegarLoop]: Abstraction has 581 states and 725 transitions. [2020-10-28 15:09:28,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:09:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 725 transitions. [2020-10-28 15:09:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:09:28,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:28,382 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:28,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:09:28,382 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:28,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1454917097, now seen corresponding path program 20 times [2020-10-28 15:09:28,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:28,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310074537] [2020-10-28 15:09:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:31,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:31,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:09:31,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:09:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3186 [2020-10-28 15:09:31,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:31,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:09:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:09:31,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:09:31,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:31,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:31,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:31,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 15:09:31,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310074537] [2020-10-28 15:09:31,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:31,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:09:31,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25518943] [2020-10-28 15:09:31,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:09:31,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:09:31,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:31,692 INFO L87 Difference]: Start difference. First operand 581 states and 725 transitions. Second operand 7 states. [2020-10-28 15:09:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:32,144 INFO L93 Difference]: Finished difference Result 621 states and 768 transitions. [2020-10-28 15:09:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:09:32,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-28 15:09:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:32,147 INFO L225 Difference]: With dead ends: 621 [2020-10-28 15:09:32,147 INFO L226 Difference]: Without dead ends: 548 [2020-10-28 15:09:32,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-28 15:09:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 528. [2020-10-28 15:09:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-10-28 15:09:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 661 transitions. [2020-10-28 15:09:32,200 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 661 transitions. Word has length 34 [2020-10-28 15:09:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:32,200 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 661 transitions. [2020-10-28 15:09:32,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:09:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 661 transitions. [2020-10-28 15:09:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:09:32,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:32,202 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:32,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:09:32,202 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:32,203 INFO L82 PathProgramCache]: Analyzing trace with hash 80866489, now seen corresponding path program 21 times [2020-10-28 15:09:32,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:32,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420909858] [2020-10-28 15:09:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:32,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1590 [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:09:33,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:33,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:09:33,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:34,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:34,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:34,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:34,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:34,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:34,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-28 15:09:34,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420909858] [2020-10-28 15:09:34,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:34,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:34,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605395273] [2020-10-28 15:09:34,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:34,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:34,068 INFO L87 Difference]: Start difference. First operand 528 states and 661 transitions. Second operand 10 states. [2020-10-28 15:09:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:34,935 INFO L93 Difference]: Finished difference Result 548 states and 680 transitions. [2020-10-28 15:09:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:09:34,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-28 15:09:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:34,938 INFO L225 Difference]: With dead ends: 548 [2020-10-28 15:09:34,938 INFO L226 Difference]: Without dead ends: 534 [2020-10-28 15:09:34,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-10-28 15:09:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 519. [2020-10-28 15:09:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-28 15:09:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 649 transitions. [2020-10-28 15:09:34,975 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 649 transitions. Word has length 34 [2020-10-28 15:09:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:34,975 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 649 transitions. [2020-10-28 15:09:34,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 649 transitions. [2020-10-28 15:09:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:09:34,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:34,977 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:34,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:09:34,977 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash 676175070, now seen corresponding path program 2 times [2020-10-28 15:09:34,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:34,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294865632] [2020-10-28 15:09:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:35,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:35,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:35,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:35,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:37,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:37,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:09:37,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:09:37,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2471 [2020-10-28 15:09:37,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:37,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:09:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 15:09:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:09:37,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:37,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:37,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:37,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:37,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:37,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:37,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:37,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:37,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:37,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:37,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 15:09:37,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294865632] [2020-10-28 15:09:37,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:37,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:09:37,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344688244] [2020-10-28 15:09:37,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:09:37,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:37,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:09:37,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:09:37,556 INFO L87 Difference]: Start difference. First operand 519 states and 649 transitions. Second operand 6 states. [2020-10-28 15:09:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:37,982 INFO L93 Difference]: Finished difference Result 563 states and 694 transitions. [2020-10-28 15:09:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:09:37,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 15:09:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:37,986 INFO L225 Difference]: With dead ends: 563 [2020-10-28 15:09:37,986 INFO L226 Difference]: Without dead ends: 557 [2020-10-28 15:09:37,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-10-28 15:09:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 519. [2020-10-28 15:09:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-10-28 15:09:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 648 transitions. [2020-10-28 15:09:38,032 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 648 transitions. Word has length 35 [2020-10-28 15:09:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:38,033 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 648 transitions. [2020-10-28 15:09:38,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:09:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 648 transitions. [2020-10-28 15:09:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:38,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:38,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:38,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:09:38,034 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:38,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1759054375, now seen corresponding path program 22 times [2020-10-28 15:09:38,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:38,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245510220] [2020-10-28 15:09:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:38,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:40,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:40,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:40,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2288 [2020-10-28 15:09:40,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:40,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:09:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:09:40,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:43,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:43,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:43,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:09:43,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245510220] [2020-10-28 15:09:43,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:43,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:09:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633602447] [2020-10-28 15:09:43,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:09:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:09:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=333, Unknown=1, NotChecked=0, Total=380 [2020-10-28 15:09:43,824 INFO L87 Difference]: Start difference. First operand 519 states and 648 transitions. Second operand 20 states. [2020-10-28 15:09:44,560 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-28 15:09:46,139 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-28 15:09:46,466 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-28 15:09:49,073 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-28 15:09:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:49,956 INFO L93 Difference]: Finished difference Result 574 states and 717 transitions. [2020-10-28 15:09:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:09:49,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-28 15:09:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:49,960 INFO L225 Difference]: With dead ends: 574 [2020-10-28 15:09:49,960 INFO L226 Difference]: Without dead ends: 547 [2020-10-28 15:09:49,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=202, Invalid=1437, Unknown=1, NotChecked=0, Total=1640 [2020-10-28 15:09:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-28 15:09:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 506. [2020-10-28 15:09:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-28 15:09:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 634 transitions. [2020-10-28 15:09:50,005 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 634 transitions. Word has length 36 [2020-10-28 15:09:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:50,005 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 634 transitions. [2020-10-28 15:09:50,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:09:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 634 transitions. [2020-10-28 15:09:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:50,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:50,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:50,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:09:50,007 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 714812666, now seen corresponding path program 23 times [2020-10-28 15:09:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:50,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732522289] [2020-10-28 15:09:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:50,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:50,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:50,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:50,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:52,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:52,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:52,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:09:52,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-28 15:09:52,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:52,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:09:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:52,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:52,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:52,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:52,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:52,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:52,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:52,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:52,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:09:52,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732522289] [2020-10-28 15:09:52,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:52,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:52,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766085660] [2020-10-28 15:09:52,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:52,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:52,405 INFO L87 Difference]: Start difference. First operand 506 states and 634 transitions. Second operand 11 states. [2020-10-28 15:09:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:53,334 INFO L93 Difference]: Finished difference Result 551 states and 678 transitions. [2020-10-28 15:09:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:53,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-28 15:09:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:53,339 INFO L225 Difference]: With dead ends: 551 [2020-10-28 15:09:53,339 INFO L226 Difference]: Without dead ends: 529 [2020-10-28 15:09:53,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-10-28 15:09:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 498. [2020-10-28 15:09:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-28 15:09:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 625 transitions. [2020-10-28 15:09:53,382 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 625 transitions. Word has length 36 [2020-10-28 15:09:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:53,382 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 625 transitions. [2020-10-28 15:09:53,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 625 transitions. [2020-10-28 15:09:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:53,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:53,384 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:53,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:09:53,384 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1276619002, now seen corresponding path program 5 times [2020-10-28 15:09:53,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:53,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395343394] [2020-10-28 15:09:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:58,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:58,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:09:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:09:58,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:58,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:58,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:09:58,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:09:58,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:09:58,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:58,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:58,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:58,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:58,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:58,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:58,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:58,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:58,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:58,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:58,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:09:58,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395343394] [2020-10-28 15:09:58,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:58,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:09:58,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98571514] [2020-10-28 15:09:58,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:09:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:09:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:09:58,738 INFO L87 Difference]: Start difference. First operand 498 states and 625 transitions. Second operand 13 states. [2020-10-28 15:10:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:01,903 INFO L93 Difference]: Finished difference Result 595 states and 724 transitions. [2020-10-28 15:10:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:10:01,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-28 15:10:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:01,907 INFO L225 Difference]: With dead ends: 595 [2020-10-28 15:10:01,907 INFO L226 Difference]: Without dead ends: 487 [2020-10-28 15:10:01,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:10:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-10-28 15:10:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 470. [2020-10-28 15:10:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-28 15:10:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 578 transitions. [2020-10-28 15:10:01,945 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 578 transitions. Word has length 36 [2020-10-28 15:10:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:01,945 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 578 transitions. [2020-10-28 15:10:01,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:10:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 578 transitions. [2020-10-28 15:10:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:10:01,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:01,946 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:01,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:10:01,946 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash 555928219, now seen corresponding path program 24 times [2020-10-28 15:10:01,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:01,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291493597] [2020-10-28 15:10:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:01,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:05,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:05,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3866 [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:10:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:05,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:05,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:05,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:05,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:05,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:05,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:05,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:05,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:05,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 15:10:05,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291493597] [2020-10-28 15:10:05,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:05,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:10:05,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515708949] [2020-10-28 15:10:05,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:10:05,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:05,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:10:05,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:10:05,946 INFO L87 Difference]: Start difference. First operand 470 states and 578 transitions. Second operand 6 states. [2020-10-28 15:10:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:06,564 INFO L93 Difference]: Finished difference Result 504 states and 612 transitions. [2020-10-28 15:10:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:10:06,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 15:10:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:06,567 INFO L225 Difference]: With dead ends: 504 [2020-10-28 15:10:06,567 INFO L226 Difference]: Without dead ends: 498 [2020-10-28 15:10:06,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-28 15:10:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 470. [2020-10-28 15:10:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-28 15:10:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 577 transitions. [2020-10-28 15:10:06,606 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 577 transitions. Word has length 36 [2020-10-28 15:10:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:06,606 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 577 transitions. [2020-10-28 15:10:06,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:10:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 577 transitions. [2020-10-28 15:10:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:10:06,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:06,607 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:06,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:10:06,607 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:06,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1442113680, now seen corresponding path program 25 times [2020-10-28 15:10:06,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:06,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236775398] [2020-10-28 15:10:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:06,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:06,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:06,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:07,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:07,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:08,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:10,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:10,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:10:10,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:10:10,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4119 [2020-10-28 15:10:10,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:10,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:10:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 15:10:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:10:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:10,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:10,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:10,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:10,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:10,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:10,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:10,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:10,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:10,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:10,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:10,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:10:10,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236775398] [2020-10-28 15:10:10,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:10,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:10:10,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485030726] [2020-10-28 15:10:10,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:10:10,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:10,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:10:10,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:10,980 INFO L87 Difference]: Start difference. First operand 470 states and 577 transitions. Second operand 11 states. [2020-10-28 15:10:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:12,094 INFO L93 Difference]: Finished difference Result 720 states and 951 transitions. [2020-10-28 15:10:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:10:12,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 15:10:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:12,097 INFO L225 Difference]: With dead ends: 720 [2020-10-28 15:10:12,097 INFO L226 Difference]: Without dead ends: 688 [2020-10-28 15:10:12,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:10:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-10-28 15:10:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 563. [2020-10-28 15:10:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-28 15:10:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 689 transitions. [2020-10-28 15:10:12,130 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 689 transitions. Word has length 37 [2020-10-28 15:10:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:12,131 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 689 transitions. [2020-10-28 15:10:12,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:10:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 689 transitions. [2020-10-28 15:10:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:10:12,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:12,132 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:12,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:10:12,132 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:12,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:12,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1123243134, now seen corresponding path program 26 times [2020-10-28 15:10:12,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:12,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730020454] [2020-10-28 15:10:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:12,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:12,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:12,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:12,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:12,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:14,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:14,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:10:14,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:10:14,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-28 15:10:14,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:14,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:14,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:10:14,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:14,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:10:14,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:15,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:15,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:15,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:15,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:15,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:15,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:15,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:15,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:10:15,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730020454] [2020-10-28 15:10:15,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:15,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:10:15,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298596827] [2020-10-28 15:10:15,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:10:15,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:15,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:10:15,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:10:15,256 INFO L87 Difference]: Start difference. First operand 563 states and 689 transitions. Second operand 14 states. [2020-10-28 15:10:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:17,118 INFO L93 Difference]: Finished difference Result 837 states and 1068 transitions. [2020-10-28 15:10:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:10:17,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-28 15:10:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:17,123 INFO L225 Difference]: With dead ends: 837 [2020-10-28 15:10:17,123 INFO L226 Difference]: Without dead ends: 716 [2020-10-28 15:10:17,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:10:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-28 15:10:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 591. [2020-10-28 15:10:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-28 15:10:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 728 transitions. [2020-10-28 15:10:17,160 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 728 transitions. Word has length 37 [2020-10-28 15:10:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:17,161 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 728 transitions. [2020-10-28 15:10:17,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:10:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 728 transitions. [2020-10-28 15:10:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:10:17,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:17,162 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:17,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:10:17,162 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash 68795642, now seen corresponding path program 27 times [2020-10-28 15:10:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:17,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811653208] [2020-10-28 15:10:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:17,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:17,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:17,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:17,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:17,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:18,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:18,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:18,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:10:18,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:10:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-28 15:10:18,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:18,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:10:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:10:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:18,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:18,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:18,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:18,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:18,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:18,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:18,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:18,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:18,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:10:18,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811653208] [2020-10-28 15:10:18,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:18,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:10:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11736050] [2020-10-28 15:10:18,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:10:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:10:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:18,905 INFO L87 Difference]: Start difference. First operand 591 states and 728 transitions. Second operand 15 states. [2020-10-28 15:10:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:20,883 INFO L93 Difference]: Finished difference Result 873 states and 1123 transitions. [2020-10-28 15:10:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:10:20,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 15:10:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:20,887 INFO L225 Difference]: With dead ends: 873 [2020-10-28 15:10:20,887 INFO L226 Difference]: Without dead ends: 752 [2020-10-28 15:10:20,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:10:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-10-28 15:10:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 619. [2020-10-28 15:10:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-10-28 15:10:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 767 transitions. [2020-10-28 15:10:20,934 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 767 transitions. Word has length 38 [2020-10-28 15:10:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:20,934 INFO L481 AbstractCegarLoop]: Abstraction has 619 states and 767 transitions. [2020-10-28 15:10:20,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:10:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 767 transitions. [2020-10-28 15:10:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:10:20,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:20,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:20,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:10:20,936 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1762530305, now seen corresponding path program 28 times [2020-10-28 15:10:20,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:20,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135272368] [2020-10-28 15:10:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:20,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:21,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:22,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:23,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:23,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2902 [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:10:23,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:26,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:26,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:26,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:26,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:26,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:26,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:26,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:26,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:26,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:26,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:26,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:10:26,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135272368] [2020-10-28 15:10:26,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:26,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:10:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133349685] [2020-10-28 15:10:26,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:10:26,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:10:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=178, Unknown=1, NotChecked=0, Total=210 [2020-10-28 15:10:26,556 INFO L87 Difference]: Start difference. First operand 619 states and 767 transitions. Second operand 15 states.