/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/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:10:32,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:10:32,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:10:32,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:10:32,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:10:32,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:10:32,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:10:32,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:10:32,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:10:32,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:10:32,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:10:32,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:10:32,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:10:32,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:10:32,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:10:32,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:10:32,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:10:32,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:10:32,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:10:32,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:10:32,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:10:32,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:10:32,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:10:32,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:10:32,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:10:32,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:10:32,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:10:32,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:10:32,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:10:32,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:10:32,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:10:32,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:10:32,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:10:32,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:10:32,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:10:32,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:10:32,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:10:32,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:10:32,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:10:32,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:10:32,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:10:32,604 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 15:10:32,650 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:10:32,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:10:32,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:10:32,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:10:32,652 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:10:32,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:10:32,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:10:32,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:10:32,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:10:32,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:10:32,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:10:32,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:10:32,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:10:32,654 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:10:32,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:10:32,654 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:10:32,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:10:32,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:10:32,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:10:32,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:10:32,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:10:32,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:10:32,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:10:32,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:10:32,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:10:32,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:10:32,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:10:32,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:10:32,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:10:32,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:10:33,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:10:33,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:10:33,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:10:33,040 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:10:33,040 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:10:33,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2020-10-28 15:10:33,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b9231096/e9c564a715a14c4983dda5ca5de94f4f/FLAG9f9a52f58 [2020-10-28 15:10:33,675 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:10:33,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2020-10-28 15:10:33,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b9231096/e9c564a715a14c4983dda5ca5de94f4f/FLAG9f9a52f58 [2020-10-28 15:10:34,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b9231096/e9c564a715a14c4983dda5ca5de94f4f [2020-10-28 15:10:34,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:10:34,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:10:34,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:10:34,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:10:34,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:10:34,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd3882f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34, skipping insertion in model container [2020-10-28 15:10:34,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:10:34,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:10:34,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:10:34,309 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:10:34,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:10:34,338 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:10:34,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34 WrapperNode [2020-10-28 15:10:34,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:10:34,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:10:34,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:10:34,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:10:34,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (1/1) ... [2020-10-28 15:10:34,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:10:34,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:10:34,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:10:34,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:10:34,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (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 15:10:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:10:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:10:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:10:34,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:10:34,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:10:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:10:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:10:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:10:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:10:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:10:34,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:10:34,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:10:34,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:10:34,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:10:34,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:10:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:10:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:10:34,757 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:10:34,757 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 15:10:34,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:10:34 BoogieIcfgContainer [2020-10-28 15:10:34,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:10:34,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:10:34,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:10:34,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:10:34,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:10:34" (1/3) ... [2020-10-28 15:10:34,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfb0d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:10:34, skipping insertion in model container [2020-10-28 15:10:34,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:10:34" (2/3) ... [2020-10-28 15:10:34,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfb0d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:10:34, skipping insertion in model container [2020-10-28 15:10:34,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:10:34" (3/3) ... [2020-10-28 15:10:34,769 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2020-10-28 15:10:34,781 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:10:34,786 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:10:34,801 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:10:34,861 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:10:34,864 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:10:34,864 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:10:34,864 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:10:34,864 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:10:34,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:10:34,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:10:34,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:10:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 15:10:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:10:34,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:34,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:34,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:34,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:34,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1007641703, now seen corresponding path program 1 times [2020-10-28 15:10:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:34,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467144087] [2020-10-28 15:10:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:10:35,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:35,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-28 15:10:35,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:10:35,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:35,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:10:35,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:35,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:35,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:10:35,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:35,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:35,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:35,641 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 15:10:35,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467144087] [2020-10-28 15:10:35,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:35,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:10:35,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379459561] [2020-10-28 15:10:35,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:10:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:35,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:10:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:10:35,677 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 15:10:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:35,765 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-28 15:10:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:10:35,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:10:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:35,777 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:10:35,778 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 15:10:35,782 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 15:10:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 15:10:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 15:10:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:10:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-28 15:10:35,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2020-10-28 15:10:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:35,826 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-28 15:10:35,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:10:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-28 15:10:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:10:35,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:35,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:35,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:10:35,828 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:35,829 INFO L82 PathProgramCache]: Analyzing trace with hash 722539485, now seen corresponding path program 1 times [2020-10-28 15:10:35,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:35,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351430105] [2020-10-28 15:10:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:10:36,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:36,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-28 15:10:36,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:10:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:36,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:36,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:10:36,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:36,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:36,133 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 15:10:36,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351430105] [2020-10-28 15:10:36,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:36,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:36,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199508755] [2020-10-28 15:10:36,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:36,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:36,138 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-28 15:10:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:36,213 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-28 15:10:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:36,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 15:10:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:36,215 INFO L225 Difference]: With dead ends: 22 [2020-10-28 15:10:36,215 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 15:10:36,216 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 15:10:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 15:10:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 15:10:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:10:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-28 15:10:36,224 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-10-28 15:10:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:36,225 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-28 15:10:36,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-28 15:10:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:10:36,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:36,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:36,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:10:36,226 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:36,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2025547079, now seen corresponding path program 1 times [2020-10-28 15:10:36,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:36,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243220970] [2020-10-28 15:10:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:10:36,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:36,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 15:10:36,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:10:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:36,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:10:36,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:36,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:36,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:36,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:10:36,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:36,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:36,426 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 15:10:36,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243220970] [2020-10-28 15:10:36,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:36,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:10:36,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016212798] [2020-10-28 15:10:36,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:10:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:10:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:36,432 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-10-28 15:10:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:36,564 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-28 15:10:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:10:36,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 15:10:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:36,568 INFO L225 Difference]: With dead ends: 23 [2020-10-28 15:10:36,568 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:10:36,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:10:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 15:10:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:10:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-28 15:10:36,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-28 15:10:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:36,577 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-28 15:10:36,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:10:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-28 15:10:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:10:36,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:36,579 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:36,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:10:36,580 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash -530890467, now seen corresponding path program 2 times [2020-10-28 15:10:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:36,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672581187] [2020-10-28 15:10:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:10:36,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:36,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-28 15:10:36,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:36,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:10:36,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:36,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:36,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:36,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:36,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:10:36,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:36,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:36,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:36,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:36,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:36,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 15:10:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:36,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672581187] [2020-10-28 15:10:36,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:36,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:36,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218779417] [2020-10-28 15:10:36,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:36,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:36,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:36,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:36,820 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-28 15:10:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:36,895 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-28 15:10:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:36,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 15:10:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:36,896 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:10:36,896 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:10:36,897 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 15:10:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:10:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:10:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:10:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 15:10:36,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 15:10:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:36,903 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 15:10:36,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 15:10:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:10:36,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:36,904 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:36,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:10:36,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:36,905 INFO L82 PathProgramCache]: Analyzing trace with hash 947918618, now seen corresponding path program 1 times [2020-10-28 15:10:36,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:36,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591964245] [2020-10-28 15:10:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:37,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:10:37,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:10:37,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 15:10:37,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:37,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:37,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:10:37,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:10:37,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:10:37,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:37,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:37,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:37,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:37,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:37,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:37,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:37,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:37,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:37,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:37,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591964245] [2020-10-28 15:10:37,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:10:37,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:10:37,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529155050] [2020-10-28 15:10:37,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:10:37,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:10:37,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:10:37,140 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-28 15:10:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:37,207 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-28 15:10:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:10:37,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 15:10:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:37,208 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:10:37,208 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:10:37,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 15:10:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:10:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 15:10:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:10:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-28 15:10:37,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-28 15:10:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:37,214 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-28 15:10:37,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:10:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-28 15:10:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:10:37,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:37,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:37,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:10:37,216 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash 56247317, now seen corresponding path program 1 times [2020-10-28 15:10:37,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:37,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900181020] [2020-10-28 15:10:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:37,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:37,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:10:37,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 15:10:37,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:37,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:10:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:37,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:10:37,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:37,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:37,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:37,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:37,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:37,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:37,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:37,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:37,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:37,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:37,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:37,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900181020] [2020-10-28 15:10:37,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:37,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:10:37,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008660416] [2020-10-28 15:10:37,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:10:37,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:10:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:37,425 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-28 15:10:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:37,518 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-28 15:10:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:10:37,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:10:37,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:37,520 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:10:37,520 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 15:10:37,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 15:10:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 15:10:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:10:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-28 15:10:37,526 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-28 15:10:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:37,527 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-28 15:10:37,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:10:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-28 15:10:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:10:37,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:37,528 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:37,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:10:37,528 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1895420818, now seen corresponding path program 2 times [2020-10-28 15:10:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:37,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477679194] [2020-10-28 15:10:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:37,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:37,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:10:37,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:37,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-28 15:10:37,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:37,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:10:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:37,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:10:37,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:37,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:37,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:37,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:37,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:37,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:37,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:10:37,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:37,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:37,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:10:37,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477679194] [2020-10-28 15:10:37,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:37,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:10:37,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288297802] [2020-10-28 15:10:37,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:10:37,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:37,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:10:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:10:37,843 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-28 15:10:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:37,983 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 15:10:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:10:37,984 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 15:10:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:37,984 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:10:37,984 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:10:37,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:10:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 15:10:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:10:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 15:10:37,995 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-28 15:10:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:37,995 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 15:10:37,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:10:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 15:10:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:10:37,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:37,998 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:37,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:10:37,998 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash -185370673, now seen corresponding path program 3 times [2020-10-28 15:10:37,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:37,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532174148] [2020-10-28 15:10:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:38,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:38,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:10:38,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:38,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-28 15:10:38,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:38,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:10:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:10:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:10:38,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:38,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:38,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:38,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:38,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:38,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:10:38,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:38,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:38,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:38,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:38,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:38,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:10:38,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532174148] [2020-10-28 15:10:38,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:38,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:10:38,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473603916] [2020-10-28 15:10:38,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:10:38,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:38,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:10:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:10:38,473 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-28 15:10:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:38,582 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 15:10:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:10:38,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 15:10:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:38,587 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:10:38,587 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:10:38,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:10:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 15:10:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:10:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-28 15:10:38,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2020-10-28 15:10:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:38,598 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-28 15:10:38,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:10:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-28 15:10:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:10:38,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:38,599 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:38,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:10:38,600 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:38,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:38,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1886931850, now seen corresponding path program 4 times [2020-10-28 15:10:38,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:38,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500529111] [2020-10-28 15:10:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:38,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:10:39,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:39,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-28 15:10:39,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:10:39,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:39,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:10:39,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:39,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:39,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:39,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:39,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:10:39,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:39,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:10:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500529111] [2020-10-28 15:10:39,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:39,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:10:39,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637873531] [2020-10-28 15:10:39,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:10:39,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:10:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:10:39,192 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-10-28 15:10:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:39,342 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-28 15:10:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:10:39,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 15:10:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:39,344 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:10:39,344 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:10:39,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:10:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-28 15:10:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:10:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 15:10:39,351 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2020-10-28 15:10:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:39,351 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 15:10:39,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:10:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 15:10:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:10:39,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:39,352 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:39,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:10:39,352 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:39,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash -532995270, now seen corresponding path program 5 times [2020-10-28 15:10:39,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:39,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259615450] [2020-10-28 15:10:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:39,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:10:39,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:39,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-28 15:10:39,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:10:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:10:39,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:39,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:39,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:39,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:39,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:39,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:39,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:39,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:10:39,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259615450] [2020-10-28 15:10:39,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:39,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:10:39,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121851249] [2020-10-28 15:10:39,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:10:39,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:10:39,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:39,908 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-10-28 15:10:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:40,104 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-28 15:10:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:10:40,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-28 15:10:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:40,106 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:10:40,106 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:10:40,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:10:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 15:10:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:10:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 15:10:40,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2020-10-28 15:10:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:40,113 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 15:10:40,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:10:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 15:10:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:10:40,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:40,114 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:40,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:10:40,114 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 851418397, now seen corresponding path program 6 times [2020-10-28 15:10:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:40,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585658815] [2020-10-28 15:10:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:40,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:10:40,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:40,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-28 15:10:40,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:40,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:10:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:10:40,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:40,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:40,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:40,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:40,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:40,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:40,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:40,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:40,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:40,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:40,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:10:40,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585658815] [2020-10-28 15:10:40,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:40,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:10:40,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219916330] [2020-10-28 15:10:40,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:10:40,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:40,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:10:40,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:10:40,729 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-28 15:10:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:40,959 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 15:10:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:10:40,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 15:10:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:40,960 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:10:40,960 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:10:40,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:10:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 15:10:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:10:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 15:10:40,978 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2020-10-28 15:10:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:40,978 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 15:10:40,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:10:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 15:10:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:10:40,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:40,979 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:40,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:10:40,979 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash -166909376, now seen corresponding path program 7 times [2020-10-28 15:10:40,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:40,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412148333] [2020-10-28 15:10:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:41,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:10:41,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:41,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-28 15:10:41,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:41,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:41,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:10:41,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:10:41,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:10:41,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:41,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:41,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:41,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:41,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:41,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:41,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:41,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:41,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:41,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:41,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:41,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:10:41,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412148333] [2020-10-28 15:10:41,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:41,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:10:41,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068606957] [2020-10-28 15:10:41,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:10:41,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:10:41,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:10:41,671 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2020-10-28 15:10:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:41,818 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-28 15:10:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:10:41,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-28 15:10:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:41,820 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:10:41,820 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 15:10:41,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 15:10:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-28 15:10:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:10:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-28 15:10:41,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2020-10-28 15:10:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:41,827 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-28 15:10:41,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:10:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-28 15:10:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:10:41,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:41,828 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:41,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:10:41,829 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash -807219419, now seen corresponding path program 8 times [2020-10-28 15:10:41,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:41,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098991337] [2020-10-28 15:10:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:42,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:10:42,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:42,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-28 15:10:42,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:42,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:42,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:10:42,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:42,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:10:42,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:42,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:42,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:42,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:42,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:42,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:42,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:42,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:42,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:10:42,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098991337] [2020-10-28 15:10:42,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:42,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:10:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136689728] [2020-10-28 15:10:42,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:10:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:10:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:42,508 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-10-28 15:10:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:42,715 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-28 15:10:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:10:42,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 15:10:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:42,717 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:10:42,717 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 15:10:42,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 15:10:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-10-28 15:10:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:10:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 15:10:42,727 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 32 [2020-10-28 15:10:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:42,727 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 15:10:42,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:10:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 15:10:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:10:42,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:42,728 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:42,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:10:42,729 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1847661311, now seen corresponding path program 9 times [2020-10-28 15:10:42,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:42,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843722445] [2020-10-28 15:10:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:42,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:43,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:10:43,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:43,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 993 [2020-10-28 15:10:43,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:43,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:10:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:43,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:10:43,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:43,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:43,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:43,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:43,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:43,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:43,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:43,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:43,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:43,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:10:43,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843722445] [2020-10-28 15:10:43,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:43,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:10:43,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111156080] [2020-10-28 15:10:43,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:10:43,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:10:43,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:43,837 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-28 15:10:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:44,110 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-28 15:10:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:10:44,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-28 15:10:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:44,111 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:10:44,112 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:10:44,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:10:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 15:10:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:10:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 15:10:44,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2020-10-28 15:10:44,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:44,120 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 15:10:44,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:10:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 15:10:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:10:44,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:44,121 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:44,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:10:44,121 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:44,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1979890756, now seen corresponding path program 10 times [2020-10-28 15:10:44,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:44,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52911232] [2020-10-28 15:10:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:44,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:44,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:44,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:45,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:10:45,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:45,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-28 15:10:45,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:45,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:10:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:10:45,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:45,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:45,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:45,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:45,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:10:45,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:45,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:45,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:10:45,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52911232] [2020-10-28 15:10:45,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:45,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:10:45,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028390967] [2020-10-28 15:10:45,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:10:45,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:10:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:10:45,269 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2020-10-28 15:10:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:45,580 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-28 15:10:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:10:45,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 15:10:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:45,581 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:10:45,581 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:10:45,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:10:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:10:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 15:10:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:10:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 15:10:45,600 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2020-10-28 15:10:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:45,600 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 15:10:45,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:10:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 15:10:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:10:45,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:45,601 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:45,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:10:45,601 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash 529545529, now seen corresponding path program 11 times [2020-10-28 15:10:45,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:45,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519844147] [2020-10-28 15:10:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:45,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:46,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:46,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:10:46,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:46,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-28 15:10:46,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:46,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:46,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:10:46,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:10:46,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:10:46,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:46,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:47,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:47,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:47,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:47,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:47,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 15:10:47,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519844147] [2020-10-28 15:10:47,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:47,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:10:47,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025463096] [2020-10-28 15:10:47,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:10:47,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:10:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:47,014 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2020-10-28 15:10:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:47,215 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-28 15:10:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:10:47,215 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-28 15:10:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:47,216 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:10:47,216 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:10:47,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:10:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 15:10:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:10:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-28 15:10:47,225 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 37 [2020-10-28 15:10:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:47,225 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-28 15:10:47,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:10:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-28 15:10:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:10:47,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:47,226 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:47,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:10:47,226 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:47,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:47,227 INFO L82 PathProgramCache]: Analyzing trace with hash 627017652, now seen corresponding path program 12 times [2020-10-28 15:10:47,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:47,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753647663] [2020-10-28 15:10:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:47,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:48,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:10:48,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-28 15:10:48,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:48,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:10:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:48,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:10:48,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:48,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:48,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:48,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:48,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:48,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:48,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:48,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:48,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:48,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:48,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 15:10:48,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753647663] [2020-10-28 15:10:48,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:48,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:10:48,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534056381] [2020-10-28 15:10:48,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:10:48,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:10:48,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:10:48,547 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 11 states. [2020-10-28 15:10:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:48,877 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-28 15:10:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:10:48,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-28 15:10:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:48,878 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:10:48,878 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:10:48,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:10:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:10:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 15:10:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:10:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-28 15:10:48,887 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 39 [2020-10-28 15:10:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:48,887 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-28 15:10:48,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:10:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-28 15:10:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:10:48,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:48,888 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:48,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:10:48,888 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 626095793, now seen corresponding path program 13 times [2020-10-28 15:10:48,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:48,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996395851] [2020-10-28 15:10:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:48,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:50,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:50,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 15:10:50,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:50,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-28 15:10:50,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:50,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:50,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:10:50,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:10:50,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:10:50,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:50,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:50,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:50,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:50,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:50,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:50,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:50,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:50,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:50,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:50,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 15:10:50,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996395851] [2020-10-28 15:10:50,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:50,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:10:50,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095334690] [2020-10-28 15:10:50,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:10:50,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:10:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:10:50,202 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2020-10-28 15:10:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:50,455 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-28 15:10:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:10:50,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 15:10:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:50,456 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:10:50,456 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:10:50,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:10:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 15:10:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:10:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 15:10:50,465 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 41 [2020-10-28 15:10:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:50,465 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 15:10:50,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:10:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 15:10:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:10:50,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:50,466 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:50,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:10:50,467 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1077459156, now seen corresponding path program 14 times [2020-10-28 15:10:50,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:50,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951972223] [2020-10-28 15:10:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:50,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:50,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:51,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:51,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 15:10:51,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-28 15:10:51,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:51,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:51,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:10:51,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:51,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:10:51,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:52,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:52,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:52,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:52,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:52,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:52,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:52,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:52,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:52,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:52,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 97 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 15:10:52,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951972223] [2020-10-28 15:10:52,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:52,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:10:52,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545262602] [2020-10-28 15:10:52,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:10:52,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:52,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:10:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:52,031 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2020-10-28 15:10:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:52,295 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-28 15:10:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:10:52,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-28 15:10:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:52,296 INFO L225 Difference]: With dead ends: 82 [2020-10-28 15:10:52,296 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 15:10:52,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 15:10:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2020-10-28 15:10:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:10:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-28 15:10:52,305 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 43 [2020-10-28 15:10:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:52,305 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-28 15:10:52,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:10:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-28 15:10:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:10:52,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:52,306 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:52,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:10:52,306 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 542235820, now seen corresponding path program 15 times [2020-10-28 15:10:52,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:52,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039902294] [2020-10-28 15:10:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:54,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:10:54,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:54,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-28 15:10:54,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:54,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:10:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:10:54,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:54,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:54,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:54,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:54,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:54,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:54,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:54,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:54,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 81 proven. 72 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-28 15:10:54,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039902294] [2020-10-28 15:10:54,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:54,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:10:54,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856071667] [2020-10-28 15:10:54,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:10:54,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:54,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:10:54,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:10:54,190 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 12 states. [2020-10-28 15:10:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:54,611 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-10-28 15:10:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:10:54,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-28 15:10:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:54,612 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:10:54,612 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:10:54,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:10:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:10:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 15:10:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:10:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 15:10:54,624 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 45 [2020-10-28 15:10:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:54,625 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 15:10:54,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:10:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 15:10:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 15:10:54,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:54,626 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:54,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:10:54,626 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:54,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:54,626 INFO L82 PathProgramCache]: Analyzing trace with hash -98444823, now seen corresponding path program 16 times [2020-10-28 15:10:54,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:54,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207397999] [2020-10-28 15:10:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:54,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:10:56,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:56,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:56,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:56,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:56,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:56,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:56,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:56,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:56,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:56,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:56,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:56,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-28 15:10:56,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207397999] [2020-10-28 15:10:56,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:56,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:10:56,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983215632] [2020-10-28 15:10:56,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:10:56,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:56,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:10:56,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:56,217 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 13 states. [2020-10-28 15:10:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:56,653 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-28 15:10:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:10:56,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-28 15:10:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:56,655 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:10:56,655 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 15:10:56,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:10:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 15:10:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 15:10:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 15:10:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-28 15:10:56,675 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 47 [2020-10-28 15:10:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:56,676 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-28 15:10:56,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:10:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-28 15:10:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 15:10:56,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:56,677 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:56,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:10:56,677 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:56,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1612219418, now seen corresponding path program 17 times [2020-10-28 15:10:56,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:56,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233207272] [2020-10-28 15:10:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:56,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:10:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:58,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:58,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:58,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:58,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 110 proven. 25 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-28 15:10:58,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233207272] [2020-10-28 15:10:58,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:58,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:10:58,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475241086] [2020-10-28 15:10:58,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:10:58,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:10:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:58,211 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2020-10-28 15:10:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:58,519 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-28 15:10:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:10:58,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-28 15:10:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:58,520 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:10:58,520 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:10:58,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:10:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 15:10:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:10:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-28 15:10:58,530 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 49 [2020-10-28 15:10:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:58,530 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-28 15:10:58,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:10:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-28 15:10:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:10:58,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:58,531 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:58,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:10:58,531 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash -489705375, now seen corresponding path program 18 times [2020-10-28 15:10:58,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:58,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915897552] [2020-10-28 15:10:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:58,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:11:00,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:00,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1829 [2020-10-28 15:11:00,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:11:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:11:00,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:00,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:00,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:00,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:00,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:00,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:00,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-28 15:11:00,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915897552] [2020-10-28 15:11:00,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:00,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:11:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324104985] [2020-10-28 15:11:00,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:11:00,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:11:00,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:11:00,536 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 14 states. [2020-10-28 15:11:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:01,053 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2020-10-28 15:11:01,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:11:01,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-28 15:11:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:01,054 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:11:01,054 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:11:01,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:11:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:11:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 15:11:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 15:11:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-28 15:11:01,069 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 51 [2020-10-28 15:11:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:01,069 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-28 15:11:01,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:11:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-28 15:11:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:11:01,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:01,070 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:01,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:11:01,070 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:01,071 INFO L82 PathProgramCache]: Analyzing trace with hash 147459038, now seen corresponding path program 19 times [2020-10-28 15:11:01,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:01,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257623617] [2020-10-28 15:11:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:01,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:02,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:02,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:11:02,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:02,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1810 [2020-10-28 15:11:02,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:02,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:11:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:11:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:11:02,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:02,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:02,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:02,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:02,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:02,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:02,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:02,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:02,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:02,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:02,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:02,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:02,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-28 15:11:02,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257623617] [2020-10-28 15:11:02,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:02,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:11:02,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637952205] [2020-10-28 15:11:02,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:11:02,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:02,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:11:03,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:11:03,000 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 10 states. [2020-10-28 15:11:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:03,454 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-28 15:11:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:11:03,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-28 15:11:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:03,456 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:11:03,456 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:11:03,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:11:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:11:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 15:11:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 15:11:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-28 15:11:03,471 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 53 [2020-10-28 15:11:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:03,471 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-28 15:11:03,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:11:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-28 15:11:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 15:11:03,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:03,473 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:03,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:11:03,475 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:03,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:03,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1655823783, now seen corresponding path program 20 times [2020-10-28 15:11:03,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:03,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884767403] [2020-10-28 15:11:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:03,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:05,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:05,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:11:05,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-10-28 15:11:05,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:05,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:11:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:11:05,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:05,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:05,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:05,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:05,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:05,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:05,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:05,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:05,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:05,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:05,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:05,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 15:11:05,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884767403] [2020-10-28 15:11:05,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:05,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:11:05,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000320740] [2020-10-28 15:11:05,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:11:05,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:05,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:11:05,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:11:05,737 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 15 states. [2020-10-28 15:11:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:06,339 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-10-28 15:11:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:11:06,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-28 15:11:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:06,340 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:11:06,340 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:11:06,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:11:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:11:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 15:11:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 15:11:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-28 15:11:06,349 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 55 [2020-10-28 15:11:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:06,349 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-28 15:11:06,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:11:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-28 15:11:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 15:11:06,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:06,350 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:06,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:11:06,350 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1065645910, now seen corresponding path program 21 times [2020-10-28 15:11:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:06,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077882326] [2020-10-28 15:11:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:08,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 15:11:08,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:08,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1885 [2020-10-28 15:11:08,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:08,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:11:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:11:08,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:08,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:08,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:08,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:08,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:08,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:08,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:08,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:08,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:08,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 15:11:08,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077882326] [2020-10-28 15:11:08,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:08,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:11:08,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258059217] [2020-10-28 15:11:08,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:11:08,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:08,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:11:08,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:11:08,451 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 16 states. [2020-10-28 15:11:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:09,052 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-28 15:11:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:11:09,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-28 15:11:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:09,054 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:11:09,054 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:11:09,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:11:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:11:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 15:11:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 15:11:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-28 15:11:09,063 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 57 [2020-10-28 15:11:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:09,063 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-28 15:11:09,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:11:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-28 15:11:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 15:11:09,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:09,064 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:09,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:11:09,064 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash 762937619, now seen corresponding path program 22 times [2020-10-28 15:11:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:09,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947091612] [2020-10-28 15:11:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:09,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:09,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:11,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:11:11,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2736 [2020-10-28 15:11:11,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:11,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:11,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:11:11,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:11:11,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:11:11,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:11,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:11,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:11,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:11,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:11,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:11,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:11,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:11,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:11,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 195 proven. 49 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-28 15:11:11,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947091612] [2020-10-28 15:11:11,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:11,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:11:11,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364538441] [2020-10-28 15:11:11,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:11:11,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:11,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:11:11,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:11:11,939 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 11 states. [2020-10-28 15:11:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:12,352 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-10-28 15:11:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:11:12,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 15:11:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:12,353 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:11:12,353 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 15:11:12,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:11:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 15:11:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 15:11:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 15:11:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-28 15:11:12,364 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 59 [2020-10-28 15:11:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:12,364 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-28 15:11:12,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:11:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-28 15:11:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 15:11:12,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:12,365 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:12,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:11:12,365 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1408573006, now seen corresponding path program 23 times [2020-10-28 15:11:12,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:12,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354412421] [2020-10-28 15:11:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:12,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:12,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:14,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 15:11:14,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:14,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2254 [2020-10-28 15:11:14,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:14,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:11:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:11:14,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:14,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:14,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:14,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:14,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:14,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:14,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:14,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:14,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:14,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:14,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:14,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 259 proven. 21 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-28 15:11:14,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354412421] [2020-10-28 15:11:14,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:14,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:11:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451600035] [2020-10-28 15:11:14,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:11:14,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:11:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:11:14,783 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 12 states. [2020-10-28 15:11:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:15,236 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2020-10-28 15:11:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:11:15,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-28 15:11:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:15,238 INFO L225 Difference]: With dead ends: 143 [2020-10-28 15:11:15,238 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 15:11:15,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:11:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 15:11:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 65. [2020-10-28 15:11:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 15:11:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2020-10-28 15:11:15,247 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 61 [2020-10-28 15:11:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:15,248 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2020-10-28 15:11:15,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:11:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2020-10-28 15:11:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 15:11:15,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:15,248 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:15,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:11:15,249 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -300813322, now seen corresponding path program 24 times [2020-10-28 15:11:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:15,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167022163] [2020-10-28 15:11:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3662 [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:11:18,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:18,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:11:18,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:19,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:19,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-28 15:11:19,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167022163] [2020-10-28 15:11:19,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:19,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:11:19,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643179450] [2020-10-28 15:11:19,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:11:19,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:19,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:11:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:11:19,152 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 17 states. [2020-10-28 15:11:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:19,844 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-10-28 15:11:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:11:19,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-10-28 15:11:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:19,846 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:11:19,846 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:11:19,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:11:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:11:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 15:11:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:11:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-28 15:11:19,855 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 64 [2020-10-28 15:11:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:19,855 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-28 15:11:19,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:11:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-28 15:11:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:11:19,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:19,856 INFO L422 BasicCegarLoop]: trace histogram [22, 14, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:19,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:11:19,856 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash -296817767, now seen corresponding path program 25 times [2020-10-28 15:11:19,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:19,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477022830] [2020-10-28 15:11:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:19,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:23,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:23,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:11:23,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:23,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3323 [2020-10-28 15:11:23,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:23,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:11:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:23,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:11:23,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:23,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:23,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:23,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:23,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-28 15:11:23,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477022830] [2020-10-28 15:11:23,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:23,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:11:23,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164921496] [2020-10-28 15:11:23,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:11:23,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:11:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:11:23,433 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 18 states. [2020-10-28 15:11:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:24,204 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2020-10-28 15:11:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:11:24,204 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-10-28 15:11:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:24,205 INFO L225 Difference]: With dead ends: 102 [2020-10-28 15:11:24,205 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:11:24,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:11:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:11:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 15:11:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:11:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-28 15:11:24,218 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 66 [2020-10-28 15:11:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:24,218 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-28 15:11:24,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:11:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-28 15:11:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 15:11:24,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:24,219 INFO L422 BasicCegarLoop]: trace histogram [23, 15, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:24,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:11:24,219 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash -752056708, now seen corresponding path program 26 times [2020-10-28 15:11:24,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:24,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497658026] [2020-10-28 15:11:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:24,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:28,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3891 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:11:28,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:28,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:28,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:28,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:28,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:28,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:28,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:28,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:28,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:28,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:28,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:28,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:28,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 255 proven. 64 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-28 15:11:28,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497658026] [2020-10-28 15:11:28,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:28,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:11:28,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277376783] [2020-10-28 15:11:28,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:11:28,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:28,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:11:28,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:11:28,258 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 12 states. [2020-10-28 15:11:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:28,720 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-28 15:11:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:11:28,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-28 15:11:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:28,722 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:11:28,723 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 15:11:28,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:11:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 15:11:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-28 15:11:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 15:11:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-10-28 15:11:28,734 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 68 [2020-10-28 15:11:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:28,734 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-10-28 15:11:28,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:11:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-10-28 15:11:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 15:11:28,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:28,735 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:28,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:11:28,735 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash -222401375, now seen corresponding path program 27 times [2020-10-28 15:11:28,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:28,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151000720] [2020-10-28 15:11:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:28,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:28,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:28,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:32,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3928 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:11:32,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:32,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:32,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:32,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-28 15:11:32,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151000720] [2020-10-28 15:11:32,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:32,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:11:32,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239840871] [2020-10-28 15:11:32,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:11:32,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:32,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:11:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:11:32,954 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 19 states. [2020-10-28 15:11:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:33,740 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-10-28 15:11:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:11:33,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2020-10-28 15:11:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:33,742 INFO L225 Difference]: With dead ends: 108 [2020-10-28 15:11:33,742 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:11:33,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:11:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:11:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 15:11:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:11:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-28 15:11:33,753 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 70 [2020-10-28 15:11:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:33,753 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-28 15:11:33,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:11:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-28 15:11:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 15:11:33,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:33,754 INFO L422 BasicCegarLoop]: trace histogram [25, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:33,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:11:33,754 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1480729084, now seen corresponding path program 28 times [2020-10-28 15:11:33,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:33,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379074503] [2020-10-28 15:11:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:33,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:33,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:33,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:37,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:37,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4193 [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:11:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:38,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:38,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:38,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:38,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:38,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 304 proven. 81 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2020-10-28 15:11:38,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379074503] [2020-10-28 15:11:38,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:38,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:11:38,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252365309] [2020-10-28 15:11:38,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:11:38,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:11:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:38,108 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 13 states. [2020-10-28 15:11:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:38,633 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2020-10-28 15:11:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:11:38,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-28 15:11:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:38,635 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:11:38,635 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 15:11:38,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:11:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 15:11:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-28 15:11:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:11:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-28 15:11:38,644 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 72 [2020-10-28 15:11:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:38,645 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-28 15:11:38,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:11:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-28 15:11:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:11:38,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:38,646 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:38,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:11:38,646 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash -396885463, now seen corresponding path program 29 times [2020-10-28 15:11:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:38,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492626901] [2020-10-28 15:11:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:38,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:43,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4706 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:11:43,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:43,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:43,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:43,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:43,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:43,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:43,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:43,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:43,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:43,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 323 proven. 272 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 15:11:43,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492626901] [2020-10-28 15:11:43,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:43,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:11:43,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538650624] [2020-10-28 15:11:43,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:11:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:11:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:11:43,642 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 20 states. [2020-10-28 15:11:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:44,569 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-10-28 15:11:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:11:44,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-28 15:11:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:44,573 INFO L225 Difference]: With dead ends: 114 [2020-10-28 15:11:44,573 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:11:44,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:11:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:11:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-28 15:11:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:11:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-28 15:11:44,586 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 74 [2020-10-28 15:11:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:44,587 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-28 15:11:44,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:11:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-28 15:11:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 15:11:44,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:44,588 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:44,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:11:44,588 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1135217164, now seen corresponding path program 30 times [2020-10-28 15:11:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:44,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021919327] [2020-10-28 15:11:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:44,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:44,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:49,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:49,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 15:11:49,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:49,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:11:49,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:49,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:11:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:11:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:49,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:49,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:49,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:49,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:49,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:49,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:49,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 15:11:49,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021919327] [2020-10-28 15:11:49,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:49,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:11:49,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153999658] [2020-10-28 15:11:49,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:11:49,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:49,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:11:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:11:49,919 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 21 states. [2020-10-28 15:11:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:50,904 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-10-28 15:11:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:11:50,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-10-28 15:11:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:50,905 INFO L225 Difference]: With dead ends: 116 [2020-10-28 15:11:50,905 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:11:50,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:11:50,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:11:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 15:11:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:11:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-28 15:11:50,916 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 76 [2020-10-28 15:11:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:50,916 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-28 15:11:50,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:11:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-28 15:11:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 15:11:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:50,917 INFO L422 BasicCegarLoop]: trace histogram [28, 18, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:50,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:11:50,917 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash 312059183, now seen corresponding path program 31 times [2020-10-28 15:11:50,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:50,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219188097] [2020-10-28 15:11:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:50,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:55,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:55,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4983 [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:11:55,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:56,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:56,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:56,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:56,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 378 proven. 100 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-28 15:11:56,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219188097] [2020-10-28 15:11:56,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:56,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:11:56,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432051731] [2020-10-28 15:11:56,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:11:56,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:11:56,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:11:56,077 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 14 states. [2020-10-28 15:11:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:56,629 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-28 15:11:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:11:56,629 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2020-10-28 15:11:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:56,630 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:11:56,630 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 15:11:56,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:11:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 15:11:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-28 15:11:56,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 15:11:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-10-28 15:11:56,641 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 78 [2020-10-28 15:11:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:56,641 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-10-28 15:11:56,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:11:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-10-28 15:11:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 15:11:56,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:56,642 INFO L422 BasicCegarLoop]: trace histogram [29, 18, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:56,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:11:56,642 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:56,643 INFO L82 PathProgramCache]: Analyzing trace with hash 190753428, now seen corresponding path program 32 times [2020-10-28 15:11:56,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:56,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467813785] [2020-10-28 15:11:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:56,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:56,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:01,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:12:01,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:01,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:01,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:01,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:01,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:01,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:01,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:01,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:01,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:01,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:01,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:01,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 399 proven. 342 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-28 15:12:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467813785] [2020-10-28 15:12:01,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:01,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:12:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213941321] [2020-10-28 15:12:01,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:12:01,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:12:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:12:01,990 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 22 states. [2020-10-28 15:12:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:03,063 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2020-10-28 15:12:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:12:03,063 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2020-10-28 15:12:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:03,064 INFO L225 Difference]: With dead ends: 122 [2020-10-28 15:12:03,064 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:12:03,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:12:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:12:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-28 15:12:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 15:12:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-10-28 15:12:03,082 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 80 [2020-10-28 15:12:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:03,082 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-10-28 15:12:03,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:12:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-10-28 15:12:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 15:12:03,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:03,084 INFO L422 BasicCegarLoop]: trace histogram [30, 19, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:03,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:12:03,084 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1425407031, now seen corresponding path program 33 times [2020-10-28 15:12:03,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:03,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727453055] [2020-10-28 15:12:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:03,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:03,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 15:12:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:12:08,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:08,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:08,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:08,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 437 proven. 121 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2020-10-28 15:12:08,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727453055] [2020-10-28 15:12:08,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:08,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:12:08,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582966753] [2020-10-28 15:12:08,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:12:08,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:12:08,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:12:08,284 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 15 states. [2020-10-28 15:12:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:08,917 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2020-10-28 15:12:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:12:08,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-28 15:12:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:08,919 INFO L225 Difference]: With dead ends: 102 [2020-10-28 15:12:08,919 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 15:12:08,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:12:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 15:12:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-28 15:12:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:12:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-28 15:12:08,936 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 82 [2020-10-28 15:12:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:08,936 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-28 15:12:08,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:12:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-28 15:12:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 15:12:08,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:08,937 INFO L422 BasicCegarLoop]: trace histogram [31, 19, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:08,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:12:08,937 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:08,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:08,938 INFO L82 PathProgramCache]: Analyzing trace with hash 671178652, now seen corresponding path program 34 times [2020-10-28 15:12:08,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:08,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9631731] [2020-10-28 15:12:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:08,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:12:13,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:14,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:14,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:14,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:14,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:14,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:14,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:14,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:14,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:14,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:14,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 460 proven. 380 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-10-28 15:12:14,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9631731] [2020-10-28 15:12:14,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:14,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:12:14,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195482826] [2020-10-28 15:12:14,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:12:14,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:12:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:12:14,327 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 23 states. [2020-10-28 15:12:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:15,400 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2020-10-28 15:12:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:12:15,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-10-28 15:12:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:15,401 INFO L225 Difference]: With dead ends: 128 [2020-10-28 15:12:15,401 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:12:15,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:12:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:12:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-28 15:12:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:12:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-28 15:12:15,414 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 84 [2020-10-28 15:12:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:15,414 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-28 15:12:15,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:12:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-28 15:12:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 15:12:15,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:15,415 INFO L422 BasicCegarLoop]: trace histogram [32, 20, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:15,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:12:15,416 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1283532735, now seen corresponding path program 35 times [2020-10-28 15:12:15,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:15,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451571045] [2020-10-28 15:12:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:15,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:15,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:15,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:20,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:20,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 15:12:20,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:20,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:12:20,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:20,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:20,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:12:20,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:20,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 15:12:20,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:20,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:20,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:20,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:20,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:20,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:20,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:20,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:20,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:20,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:20,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:20,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:20,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 483 proven. 420 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-10-28 15:12:20,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451571045] [2020-10-28 15:12:20,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:20,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:12:20,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839360273] [2020-10-28 15:12:20,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:12:20,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:20,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:12:20,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:12:20,819 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 24 states. [2020-10-28 15:12:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:21,960 INFO L93 Difference]: Finished difference Result 130 states and 157 transitions. [2020-10-28 15:12:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:12:21,961 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-10-28 15:12:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:21,962 INFO L225 Difference]: With dead ends: 130 [2020-10-28 15:12:21,962 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 15:12:21,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:12:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 15:12:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-28 15:12:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 15:12:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2020-10-28 15:12:21,974 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 86 [2020-10-28 15:12:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:21,975 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2020-10-28 15:12:21,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:12:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2020-10-28 15:12:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 15:12:21,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:21,976 INFO L422 BasicCegarLoop]: trace histogram [33, 21, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:21,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:12:21,976 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1345286946, now seen corresponding path program 36 times [2020-10-28 15:12:21,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:21,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376882180] [2020-10-28 15:12:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:22,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:22,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:26,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:12:26,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:27,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:27,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:27,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 525 proven. 144 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-28 15:12:27,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376882180] [2020-10-28 15:12:27,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:27,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:12:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134476367] [2020-10-28 15:12:27,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:12:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:27,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:12:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:12:27,186 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand 16 states. [2020-10-28 15:12:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:27,855 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2020-10-28 15:12:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:12:27,856 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2020-10-28 15:12:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:27,857 INFO L225 Difference]: With dead ends: 108 [2020-10-28 15:12:27,857 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 15:12:27,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:12:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 15:12:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-28 15:12:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 15:12:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2020-10-28 15:12:27,871 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 88 [2020-10-28 15:12:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:27,871 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2020-10-28 15:12:27,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:12:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2020-10-28 15:12:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 15:12:27,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:27,872 INFO L422 BasicCegarLoop]: trace histogram [34, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:27,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:12:27,873 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 985188295, now seen corresponding path program 37 times [2020-10-28 15:12:27,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:27,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693698086] [2020-10-28 15:12:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:27,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:27,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:32,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:32,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 15:12:32,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:32,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:12:32,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:32,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:32,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:12:32,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:32,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 15:12:32,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:33,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:33,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:33,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:33,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:12:33,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:33,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 694 proven. 45 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-28 15:12:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693698086] [2020-10-28 15:12:33,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:33,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:12:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322331112] [2020-10-28 15:12:33,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:12:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:12:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:12:33,137 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 17 states. [2020-10-28 15:12:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:33,873 INFO L93 Difference]: Finished difference Result 284 states and 393 transitions. [2020-10-28 15:12:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:12:33,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2020-10-28 15:12:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:33,877 INFO L225 Difference]: With dead ends: 284 [2020-10-28 15:12:33,877 INFO L226 Difference]: Without dead ends: 278 [2020-10-28 15:12:33,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:12:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-28 15:12:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 96. [2020-10-28 15:12:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 15:12:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-28 15:12:33,893 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 90 [2020-10-28 15:12:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:33,893 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-28 15:12:33,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:12:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-28 15:12:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 15:12:33,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:33,894 INFO L422 BasicCegarLoop]: trace histogram [34, 21, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:33,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:12:33,894 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash -214116067, now seen corresponding path program 38 times [2020-10-28 15:12:33,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:33,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826303276] [2020-10-28 15:12:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:33,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:36,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:38,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:38,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 15:12:38,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:38,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:38,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:12:38,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:38,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:12:38,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:39,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:39,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:39,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:39,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 550 proven. 462 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-28 15:12:39,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826303276] [2020-10-28 15:12:39,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:39,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:12:39,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664212856] [2020-10-28 15:12:39,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:12:39,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:39,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:12:39,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:12:39,329 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 25 states. [2020-10-28 15:12:40,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:40,557 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2020-10-28 15:12:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:12:40,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-10-28 15:12:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:40,558 INFO L225 Difference]: With dead ends: 146 [2020-10-28 15:12:40,558 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 15:12:40,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:12:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 15:12:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-28 15:12:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 15:12:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-10-28 15:12:40,575 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 95 [2020-10-28 15:12:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:40,575 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-10-28 15:12:40,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:12:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-10-28 15:12:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 15:12:40,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:40,576 INFO L422 BasicCegarLoop]: trace histogram [35, 22, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:40,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:12:40,576 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 802794778, now seen corresponding path program 39 times [2020-10-28 15:12:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:40,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853710894] [2020-10-28 15:12:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:40,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:12:45,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:45,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:12:45,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:46,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:46,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:46,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:46,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:46,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:46,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:46,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:46,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 575 proven. 506 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-28 15:12:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853710894] [2020-10-28 15:12:46,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:46,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:12:46,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892225911] [2020-10-28 15:12:46,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:12:46,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:12:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:12:46,058 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 26 states. [2020-10-28 15:12:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:47,418 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2020-10-28 15:12:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:12:47,419 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 97 [2020-10-28 15:12:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:47,420 INFO L225 Difference]: With dead ends: 148 [2020-10-28 15:12:47,420 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:12:47,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:12:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:12:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-28 15:12:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 15:12:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-28 15:12:47,437 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 97 [2020-10-28 15:12:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:47,437 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-28 15:12:47,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:12:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-28 15:12:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 15:12:47,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:47,438 INFO L422 BasicCegarLoop]: trace histogram [36, 23, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:47,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:12:47,438 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1198426665, now seen corresponding path program 40 times [2020-10-28 15:12:47,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:47,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398625013] [2020-10-28 15:12:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:47,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:50,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:52,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:52,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:12:52,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:52,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:52,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:52,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:52,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:52,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:52,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:52,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 621 proven. 169 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2020-10-28 15:12:52,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398625013] [2020-10-28 15:12:52,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:52,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:12:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119235849] [2020-10-28 15:12:52,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:12:52,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:52,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:12:52,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:12:52,694 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 17 states. [2020-10-28 15:12:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:53,457 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2020-10-28 15:12:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:12:53,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 99 [2020-10-28 15:12:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:53,459 INFO L225 Difference]: With dead ends: 124 [2020-10-28 15:12:53,459 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 15:12:53,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:12:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 15:12:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 15:12:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 15:12:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2020-10-28 15:12:53,475 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 99 [2020-10-28 15:12:53,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:53,475 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2020-10-28 15:12:53,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:12:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2020-10-28 15:12:53,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 15:12:53,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:53,476 INFO L422 BasicCegarLoop]: trace histogram [37, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:53,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:12:53,477 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1712277266, now seen corresponding path program 41 times [2020-10-28 15:12:53,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:53,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926965511] [2020-10-28 15:12:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:56,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:58,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 15:12:58,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:58,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:58,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:58,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:58,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:58,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:58,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:58,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:58,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 648 proven. 552 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-10-28 15:12:58,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926965511] [2020-10-28 15:12:58,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:58,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:12:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577320819] [2020-10-28 15:12:58,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:12:58,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:58,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:12:58,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:12:58,994 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand 27 states. [2020-10-28 15:13:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:00,430 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2020-10-28 15:13:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:13:00,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2020-10-28 15:13:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:00,432 INFO L225 Difference]: With dead ends: 154 [2020-10-28 15:13:00,432 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 15:13:00,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:13:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 15:13:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-28 15:13:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 15:13:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-28 15:13:00,451 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 101 [2020-10-28 15:13:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:00,451 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-28 15:13:00,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:13:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-28 15:13:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 15:13:00,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:00,452 INFO L422 BasicCegarLoop]: trace histogram [38, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:00,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:13:00,452 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:00,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:00,452 INFO L82 PathProgramCache]: Analyzing trace with hash -938841777, now seen corresponding path program 42 times [2020-10-28 15:13:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:00,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281822170] [2020-10-28 15:13:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:00,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:03,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:05,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:05,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 15:13:05,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:05,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:13:05,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:05,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:13:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 15:13:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:13:05,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:05,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:05,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:05,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:05,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:05,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:05,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:05,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:05,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:05,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:05,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1549 backedges. 696 proven. 196 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2020-10-28 15:13:05,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281822170] [2020-10-28 15:13:05,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:05,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:13:05,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029327065] [2020-10-28 15:13:05,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:13:05,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:13:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:13:05,720 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 18 states. [2020-10-28 15:13:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:06,562 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2020-10-28 15:13:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:13:06,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2020-10-28 15:13:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:06,564 INFO L225 Difference]: With dead ends: 128 [2020-10-28 15:13:06,564 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 15:13:06,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:13:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 15:13:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 15:13:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 15:13:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-10-28 15:13:06,578 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 103 [2020-10-28 15:13:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:06,579 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-10-28 15:13:06,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:13:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-10-28 15:13:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 15:13:06,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:06,580 INFO L422 BasicCegarLoop]: trace histogram [39, 24, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:06,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:13:06,580 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:06,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2065251466, now seen corresponding path program 43 times [2020-10-28 15:13:06,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:06,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869163519] [2020-10-28 15:13:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:06,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:10,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:11,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:13:11,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:12,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:12,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:12,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:12,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:12,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:12,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:13:12,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:12,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:12,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:12,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1626 backedges. 725 proven. 600 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-28 15:13:12,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869163519] [2020-10-28 15:13:12,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:12,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:13:12,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563797709] [2020-10-28 15:13:12,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:13:12,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:13:12,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:13:12,215 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 28 states. [2020-10-28 15:13:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:13,707 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2020-10-28 15:13:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:13:13,707 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2020-10-28 15:13:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:13,709 INFO L225 Difference]: With dead ends: 160 [2020-10-28 15:13:13,709 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 15:13:13,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:13:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 15:13:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-28 15:13:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 15:13:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-10-28 15:13:13,739 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 105 [2020-10-28 15:13:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:13,739 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-10-28 15:13:13,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:13:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-10-28 15:13:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 15:13:13,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:13,740 INFO L422 BasicCegarLoop]: trace histogram [40, 25, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:13,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:13:13,741 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1242495047, now seen corresponding path program 44 times [2020-10-28 15:13:13,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:13,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611835675] [2020-10-28 15:13:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:13,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:17,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:18,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:18,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 15:13:18,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:19,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:19,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:19,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 754 proven. 650 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-28 15:13:19,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611835675] [2020-10-28 15:13:19,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:19,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:13:19,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685841435] [2020-10-28 15:13:19,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:13:19,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:13:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:13:19,324 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 29 states. [2020-10-28 15:13:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:20,923 INFO L93 Difference]: Finished difference Result 162 states and 195 transitions. [2020-10-28 15:13:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:13:20,924 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 107 [2020-10-28 15:13:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:20,926 INFO L225 Difference]: With dead ends: 162 [2020-10-28 15:13:20,926 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 15:13:20,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:13:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 15:13:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-28 15:13:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 15:13:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2020-10-28 15:13:20,945 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 107 [2020-10-28 15:13:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:20,946 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2020-10-28 15:13:20,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:13:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2020-10-28 15:13:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 15:13:20,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:20,946 INFO L422 BasicCegarLoop]: trace histogram [41, 26, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:20,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:13:20,947 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash 847558852, now seen corresponding path program 45 times [2020-10-28 15:13:20,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:20,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214067964] [2020-10-28 15:13:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:20,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:21,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:13:25,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:26,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:26,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:26,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:26,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:26,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:26,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:26,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:26,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:26,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:26,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:26,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:26,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 806 proven. 225 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2020-10-28 15:13:26,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214067964] [2020-10-28 15:13:26,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:26,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:13:26,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516599665] [2020-10-28 15:13:26,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:13:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:13:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:13:26,243 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand 19 states. [2020-10-28 15:13:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:27,158 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2020-10-28 15:13:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:13:27,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2020-10-28 15:13:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:27,160 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:13:27,160 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 15:13:27,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:13:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 15:13:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-28 15:13:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 15:13:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-10-28 15:13:27,177 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 109 [2020-10-28 15:13:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:27,177 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-10-28 15:13:27,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:13:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-10-28 15:13:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 15:13:27,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:27,178 INFO L422 BasicCegarLoop]: trace histogram [42, 26, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:27,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:13:27,179 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash 809337535, now seen corresponding path program 46 times [2020-10-28 15:13:27,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:27,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726736332] [2020-10-28 15:13:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:27,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:27,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:31,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:32,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:32,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 15:13:32,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:13:32,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:32,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:13:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 15:13:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:32,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:32,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:32,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:32,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:32,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:13:32,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:32,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:32,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:32,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:32,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 837 proven. 702 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 15:13:32,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726736332] [2020-10-28 15:13:32,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:32,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:13:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993223604] [2020-10-28 15:13:32,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:13:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:13:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:13:32,803 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 30 states. [2020-10-28 15:13:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:34,455 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2020-10-28 15:13:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:13:34,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-10-28 15:13:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:34,457 INFO L225 Difference]: With dead ends: 168 [2020-10-28 15:13:34,457 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 15:13:34,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:13:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 15:13:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-28 15:13:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 15:13:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2020-10-28 15:13:34,474 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 111 [2020-10-28 15:13:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:34,475 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2020-10-28 15:13:34,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:13:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2020-10-28 15:13:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 15:13:34,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:34,476 INFO L422 BasicCegarLoop]: trace histogram [43, 27, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:34,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:13:34,476 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1857338556, now seen corresponding path program 47 times [2020-10-28 15:13:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:34,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941123585] [2020-10-28 15:13:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:34,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:34,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:39,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 15:13:39,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:13:39,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:39,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:39,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:13:39,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-28 15:13:39,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:13:39,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:39,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1954 backedges. 891 proven. 256 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2020-10-28 15:13:39,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941123585] [2020-10-28 15:13:39,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:39,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:13:39,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721898633] [2020-10-28 15:13:39,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:13:39,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:39,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:13:39,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:13:39,803 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 20 states. [2020-10-28 15:13:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:40,742 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2020-10-28 15:13:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:13:40,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2020-10-28 15:13:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:40,744 INFO L225 Difference]: With dead ends: 138 [2020-10-28 15:13:40,744 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 15:13:40,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:13:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 15:13:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-28 15:13:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 15:13:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-10-28 15:13:40,762 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 113 [2020-10-28 15:13:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:40,762 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-10-28 15:13:40,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:13:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-10-28 15:13:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 15:13:40,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:40,763 INFO L422 BasicCegarLoop]: trace histogram [44, 27, 17, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:40,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:13:40,764 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:40,764 INFO L82 PathProgramCache]: Analyzing trace with hash 545024183, now seen corresponding path program 48 times [2020-10-28 15:13:40,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:40,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899154767] [2020-10-28 15:13:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:40,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:40,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:45,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 15:13:45,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:46,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 924 proven. 756 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 15:13:46,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899154767] [2020-10-28 15:13:46,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:46,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:13:46,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020265237] [2020-10-28 15:13:46,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:13:46,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:46,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:13:46,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:13:46,436 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 31 states. [2020-10-28 15:13:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:48,139 INFO L93 Difference]: Finished difference Result 174 states and 211 transitions. [2020-10-28 15:13:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:13:48,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-10-28 15:13:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:48,141 INFO L225 Difference]: With dead ends: 174 [2020-10-28 15:13:48,141 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 15:13:48,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:13:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 15:13:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-28 15:13:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 15:13:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2020-10-28 15:13:48,155 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 115 [2020-10-28 15:13:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:48,155 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2020-10-28 15:13:48,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:13:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2020-10-28 15:13:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 15:13:48,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:48,156 INFO L422 BasicCegarLoop]: trace histogram [45, 28, 17, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:48,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:13:48,156 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:48,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2090622004, now seen corresponding path program 49 times [2020-10-28 15:13:48,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:48,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071613209] [2020-10-28 15:13:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:48,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:53,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 15:13:53,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:53,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:53,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:53,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:53,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:53,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:53,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2130 backedges. 957 proven. 812 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 15:13:53,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071613209] [2020-10-28 15:13:53,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:53,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:13:53,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501845494] [2020-10-28 15:13:53,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:13:53,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:53,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:13:53,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:13:53,864 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand 32 states. [2020-10-28 15:13:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:55,642 INFO L93 Difference]: Finished difference Result 176 states and 213 transitions. [2020-10-28 15:13:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:13:55,642 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 117 [2020-10-28 15:13:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:55,644 INFO L225 Difference]: With dead ends: 176 [2020-10-28 15:13:55,644 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 15:13:55,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:13:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 15:13:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-28 15:13:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 15:13:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2020-10-28 15:13:55,663 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 117 [2020-10-28 15:13:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:55,663 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2020-10-28 15:13:55,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:13:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2020-10-28 15:13:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 15:13:55,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:55,664 INFO L422 BasicCegarLoop]: trace histogram [46, 29, 17, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:55,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:13:55,664 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1351443569, now seen corresponding path program 50 times [2020-10-28 15:13:55,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:55,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405206969] [2020-10-28 15:13:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:55,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:14:00,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:00,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:00,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:00,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:00,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:00,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:00,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:14:00,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:00,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:00,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 1015 proven. 289 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2020-10-28 15:14:01,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405206969] [2020-10-28 15:14:01,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:01,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:14:01,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741773134] [2020-10-28 15:14:01,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:14:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:01,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:14:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:14:01,006 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand 21 states. [2020-10-28 15:14:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:02,038 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2020-10-28 15:14:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:14:02,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 119 [2020-10-28 15:14:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:02,040 INFO L225 Difference]: With dead ends: 144 [2020-10-28 15:14:02,040 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 15:14:02,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:14:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 15:14:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 15:14:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 15:14:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-28 15:14:02,060 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 119 [2020-10-28 15:14:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:02,060 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-28 15:14:02,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:14:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-28 15:14:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 15:14:02,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:02,061 INFO L422 BasicCegarLoop]: trace histogram [47, 29, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:02,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:14:02,062 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash -288753876, now seen corresponding path program 51 times [2020-10-28 15:14:02,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:02,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004279381] [2020-10-28 15:14:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:02,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:02,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:07,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:07,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 15:14:07,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:07,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 15:14:07,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:07,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:14:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 15:14:07,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:07,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:07,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:07,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:07,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:07,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:07,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:07,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:07,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1050 proven. 870 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2020-10-28 15:14:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004279381] [2020-10-28 15:14:07,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:07,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:14:07,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296424840] [2020-10-28 15:14:07,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:14:07,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:14:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:14:07,818 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 33 states. [2020-10-28 15:14:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:09,803 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2020-10-28 15:14:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:14:09,804 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-10-28 15:14:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:09,805 INFO L225 Difference]: With dead ends: 182 [2020-10-28 15:14:09,805 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 15:14:09,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:14:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 15:14:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-28 15:14:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 15:14:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2020-10-28 15:14:09,824 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 121 [2020-10-28 15:14:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:09,825 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2020-10-28 15:14:09,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:14:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2020-10-28 15:14:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 15:14:09,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:09,825 INFO L422 BasicCegarLoop]: trace histogram [48, 30, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:09,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:14:09,826 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash -699229975, now seen corresponding path program 52 times [2020-10-28 15:14:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:09,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710975350] [2020-10-28 15:14:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:09,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:14,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 15:14:14,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:15,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:15,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:15,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 1085 proven. 930 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2020-10-28 15:14:15,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710975350] [2020-10-28 15:14:15,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:15,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 15:14:15,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167903888] [2020-10-28 15:14:15,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 15:14:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 15:14:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:14:15,619 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 34 states. [2020-10-28 15:14:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:17,664 INFO L93 Difference]: Finished difference Result 184 states and 223 transitions. [2020-10-28 15:14:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:14:17,665 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 123 [2020-10-28 15:14:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:17,666 INFO L225 Difference]: With dead ends: 184 [2020-10-28 15:14:17,666 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 15:14:17,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 15:14:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 15:14:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 15:14:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 15:14:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2020-10-28 15:14:17,685 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 123 [2020-10-28 15:14:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:17,685 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2020-10-28 15:14:17,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 15:14:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2020-10-28 15:14:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 15:14:17,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:17,686 INFO L422 BasicCegarLoop]: trace histogram [49, 31, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:17,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:14:17,686 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:17,687 INFO L82 PathProgramCache]: Analyzing trace with hash -29769882, now seen corresponding path program 53 times [2020-10-28 15:14:17,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:17,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831839341] [2020-10-28 15:14:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:17,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:22,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:22,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 15:14:22,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:14:22,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:22,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:14:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 15:14:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:14:22,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:23,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:23,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:23,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:23,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:23,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:23,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:23,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:23,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:23,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:23,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:23,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:23,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 1147 proven. 324 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2020-10-28 15:14:23,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831839341] [2020-10-28 15:14:23,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:23,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:14:23,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258596347] [2020-10-28 15:14:23,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:14:23,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:14:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:14:23,058 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 22 states. [2020-10-28 15:14:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:24,184 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-10-28 15:14:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:14:24,184 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2020-10-28 15:14:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:24,185 INFO L225 Difference]: With dead ends: 150 [2020-10-28 15:14:24,185 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 15:14:24,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:14:24,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 15:14:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-28 15:14:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 15:14:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2020-10-28 15:14:24,207 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 125 [2020-10-28 15:14:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:24,208 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2020-10-28 15:14:24,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:14:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2020-10-28 15:14:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 15:14:24,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:24,209 INFO L422 BasicCegarLoop]: trace histogram [50, 31, 19, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:24,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 15:14:24,209 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash -489985823, now seen corresponding path program 54 times [2020-10-28 15:14:24,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:24,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408041039] [2020-10-28 15:14:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:24,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:29,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:29,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 15:14:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:30,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:30,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:30,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 1184 proven. 992 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2020-10-28 15:14:30,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408041039] [2020-10-28 15:14:30,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:30,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:14:30,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432878144] [2020-10-28 15:14:30,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:14:30,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:14:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:14:30,062 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand 35 states. [2020-10-28 15:14:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:32,088 INFO L93 Difference]: Finished difference Result 190 states and 231 transitions. [2020-10-28 15:14:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 15:14:32,089 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-10-28 15:14:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:32,090 INFO L225 Difference]: With dead ends: 190 [2020-10-28 15:14:32,090 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 15:14:32,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 15:14:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 15:14:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-28 15:14:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 15:14:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 150 transitions. [2020-10-28 15:14:32,107 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 150 transitions. Word has length 127 [2020-10-28 15:14:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:32,107 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 150 transitions. [2020-10-28 15:14:32,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:14:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 150 transitions. [2020-10-28 15:14:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 15:14:32,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:32,108 INFO L422 BasicCegarLoop]: trace histogram [51, 32, 19, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:32,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 15:14:32,108 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash -577697570, now seen corresponding path program 55 times [2020-10-28 15:14:32,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:32,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613898471] [2020-10-28 15:14:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:32,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:14:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 15:14:37,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:14:37,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:37,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:37,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:37,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 1248 proven. 361 refuted. 0 times theorem prover too weak. 1097 trivial. 0 not checked. [2020-10-28 15:14:37,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613898471] [2020-10-28 15:14:37,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:37,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:14:37,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973777364] [2020-10-28 15:14:37,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:14:37,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:37,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:14:37,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:14:37,511 INFO L87 Difference]: Start difference. First operand 130 states and 150 transitions. Second operand 23 states. [2020-10-28 15:14:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:38,703 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2020-10-28 15:14:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:14:38,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 129 [2020-10-28 15:14:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:38,705 INFO L225 Difference]: With dead ends: 154 [2020-10-28 15:14:38,705 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 15:14:38,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:14:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 15:14:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-28 15:14:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 15:14:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2020-10-28 15:14:38,726 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 129 [2020-10-28 15:14:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:38,726 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2020-10-28 15:14:38,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:14:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2020-10-28 15:14:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-28 15:14:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:38,728 INFO L422 BasicCegarLoop]: trace histogram [52, 32, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:38,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 15:14:38,728 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1232483417, now seen corresponding path program 56 times [2020-10-28 15:14:38,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:38,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950559323] [2020-10-28 15:14:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:38,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:38,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking...