/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/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:19:17,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:19:17,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:19:17,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:19:17,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:19:17,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:19:17,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:19:17,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:19:17,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:19:17,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:19:17,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:19:17,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:19:17,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:19:17,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:19:17,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:19:17,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:19:17,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:19:17,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:19:17,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:19:17,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:19:17,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:19:17,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:19:17,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:19:17,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:19:17,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:19:17,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:19:17,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:19:17,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:19:17,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:19:17,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:19:17,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:19:17,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:19:17,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:19:17,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:19:17,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:19:17,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:19:17,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:19:17,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:19:17,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:19:17,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:19:17,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:19:17,912 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 15:19:17,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:19:17,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:19:17,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:19:17,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:19:17,942 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:19:17,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:19:17,943 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:19:17,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:19:17,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:19:17,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:19:17,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:19:17,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:19:17,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:19:17,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:19:17,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:19:17,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:19:17,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:19:17,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:19:17,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:19:17,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:19:17,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:19:17,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:19:17,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:19:17,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:19:17,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:19:17,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:19:17,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:19:17,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:19:17,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:19:17,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:19:18,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:19:18,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:19:18,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:19:18,334 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:19:18,335 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:19:18,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2020-10-28 15:19:18,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d0decce7/14ec445ef88f4c67a3d86741a77ffeef/FLAG22b24c109 [2020-10-28 15:19:19,126 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:19:19,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-1.i [2020-10-28 15:19:19,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d0decce7/14ec445ef88f4c67a3d86741a77ffeef/FLAG22b24c109 [2020-10-28 15:19:19,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d0decce7/14ec445ef88f4c67a3d86741a77ffeef [2020-10-28 15:19:19,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:19:19,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:19:19,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:19,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:19:19,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:19:19,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ce48a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19, skipping insertion in model container [2020-10-28 15:19:19,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:19:19,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:19:19,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:19,689 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:19:19,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:19,731 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:19:19,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19 WrapperNode [2020-10-28 15:19:19,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:19,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:19:19,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:19:19,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:19:19,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (1/1) ... [2020-10-28 15:19:19,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:19:19,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:19:19,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:19:19,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:19:19,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (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 15:19:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:19:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:19:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:19:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:19:19,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:19:19,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:19:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:19:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:19:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:19:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:19:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:19:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:19:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:19:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:19:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 15:19:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:19:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:19:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:19:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:19:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:19:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:19:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:19:20,489 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:19:20,490 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 15:19:20,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:20 BoogieIcfgContainer [2020-10-28 15:19:20,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:19:20,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:19:20,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:19:20,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:19:20,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:19:19" (1/3) ... [2020-10-28 15:19:20,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f580a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:20, skipping insertion in model container [2020-10-28 15:19:20,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:19" (2/3) ... [2020-10-28 15:19:20,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f580a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:20, skipping insertion in model container [2020-10-28 15:19:20,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:20" (3/3) ... [2020-10-28 15:19:20,506 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2020-10-28 15:19:20,518 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:19:20,524 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:19:20,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:19:20,583 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:19:20,583 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:19:20,583 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:19:20,583 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:19:20,584 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:19:20,584 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:19:20,584 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:19:20,585 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:19:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-28 15:19:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:19:20,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:20,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:20,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash 620530695, now seen corresponding path program 1 times [2020-10-28 15:19:20,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:20,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380712746] [2020-10-28 15:19:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:20,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:21,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:21,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:21,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:21,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:19:21,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:19:21,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-28 15:19:21,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:21,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:21,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:19:21,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:21,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:19:21,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:21,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:21,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:21,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:21,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:19:21,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:21,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:21,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:21,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:21,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:21,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:21,841 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 15:19:21,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380712746] [2020-10-28 15:19:21,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:21,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:19:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271916298] [2020-10-28 15:19:21,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:19:21,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:21,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:19:21,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:19:21,867 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-28 15:19:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:22,018 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2020-10-28 15:19:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:19:22,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-28 15:19:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:22,028 INFO L225 Difference]: With dead ends: 73 [2020-10-28 15:19:22,028 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 15:19:22,032 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 15:19:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 15:19:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 15:19:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:19:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-28 15:19:22,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-10-28 15:19:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:22,074 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-28 15:19:22,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:19:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-28 15:19:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:19:22,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:22,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:22,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:19:22,077 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 6537277, now seen corresponding path program 1 times [2020-10-28 15:19:22,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:22,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200292181] [2020-10-28 15:19:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:22,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:22,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:19:22,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:19:22,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-28 15:19:22,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:22,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:19:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:19:22,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:22,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:22,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:22,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:22,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:19:22,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:22,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:22,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:22,572 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 15:19:22,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200292181] [2020-10-28 15:19:22,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:22,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:19:22,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910619842] [2020-10-28 15:19:22,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:19:22,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:22,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:19:22,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:19:22,576 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 4 states. [2020-10-28 15:19:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:22,694 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2020-10-28 15:19:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:19:22,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 15:19:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:22,697 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:19:22,698 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:19:22,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:19:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:19:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-10-28 15:19:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:19:22,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-28 15:19:22,708 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2020-10-28 15:19:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:22,709 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-28 15:19:22,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:19:22,709 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-28 15:19:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:19:22,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:22,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:22,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:19:22,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash 302054623, now seen corresponding path program 1 times [2020-10-28 15:19:22,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:22,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496115990] [2020-10-28 15:19:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:23,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:23,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:19:23,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:19:23,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-28 15:19:23,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:23,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:23,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:19:23,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:23,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:19:23,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:23,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:23,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:23,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:23,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:23,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:19:23,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:23,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:23,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:23,233 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 15:19:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496115990] [2020-10-28 15:19:23,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:23,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:19:23,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898855199] [2020-10-28 15:19:23,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:19:23,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:19:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:19:23,236 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 5 states. [2020-10-28 15:19:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:23,368 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-10-28 15:19:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:19:23,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 15:19:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:23,370 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:19:23,371 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 15:19:23,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:19:23,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 15:19:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2020-10-28 15:19:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:19:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-10-28 15:19:23,379 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2020-10-28 15:19:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:23,380 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-10-28 15:19:23,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:19:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-10-28 15:19:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:19:23,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:23,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:23,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:19:23,382 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:23,382 INFO L82 PathProgramCache]: Analyzing trace with hash 826382593, now seen corresponding path program 2 times [2020-10-28 15:19:23,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:23,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174279168] [2020-10-28 15:19:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:23,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:24,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:24,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:19:24,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:19:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-28 15:19:24,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:24,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:19:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:19:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:19:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:24,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:24,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:24,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:24,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:24,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:24,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:19:24,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:24,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:24,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:24,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:19:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:19:24,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174279168] [2020-10-28 15:19:24,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:24,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 15:19:24,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229133333] [2020-10-28 15:19:24,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:19:24,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:19:24,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:19:24,216 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 7 states. [2020-10-28 15:19:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:24,428 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2020-10-28 15:19:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:19:24,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-28 15:19:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:24,430 INFO L225 Difference]: With dead ends: 61 [2020-10-28 15:19:24,430 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:19:24,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:19:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:19:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-28 15:19:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:19:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-28 15:19:24,438 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 26 [2020-10-28 15:19:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:24,439 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-28 15:19:24,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:19:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-28 15:19:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:19:24,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:24,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:24,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:19:24,441 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash 550814618, now seen corresponding path program 1 times [2020-10-28 15:19:24,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:24,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650308416] [2020-10-28 15:19:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:24,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:29,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:29,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:19:29,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:19:29,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:19:29,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:29,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:19:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:19:29,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:19:29,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:29,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:29,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:29,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:29,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:29,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:29,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:19:29,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:29,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:29,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:29,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:29,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:29,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:19:29,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650308416] [2020-10-28 15:19:29,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:29,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:19:29,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285473673] [2020-10-28 15:19:29,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:19:29,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:29,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:19:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:19:29,538 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 4 states. [2020-10-28 15:19:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:29,621 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2020-10-28 15:19:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:19:29,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 15:19:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:29,622 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:19:29,622 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:19:29,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:19:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:19:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-10-28 15:19:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:19:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-10-28 15:19:29,632 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2020-10-28 15:19:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:29,633 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-10-28 15:19:29,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:19:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-10-28 15:19:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:19:29,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:29,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:29,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:19:29,635 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash -931755749, now seen corresponding path program 1 times [2020-10-28 15:19:29,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:29,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721528488] [2020-10-28 15:19:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:29,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:29,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:29,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:30,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:30,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:34,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:34,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:19:34,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:19:34,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:19:34,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:34,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:34,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:19:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:34,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:19:34,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:19:34,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:34,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:34,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:34,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:34,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:19:34,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:34,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:34,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:19:34,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721528488] [2020-10-28 15:19:34,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:34,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:19:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124112681] [2020-10-28 15:19:34,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:19:34,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:34,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:19:34,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:19:34,759 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 6 states. [2020-10-28 15:19:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:34,963 INFO L93 Difference]: Finished difference Result 167 states and 225 transitions. [2020-10-28 15:19:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:19:34,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-28 15:19:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:34,967 INFO L225 Difference]: With dead ends: 167 [2020-10-28 15:19:34,967 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 15:19:34,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:19:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 15:19:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 53. [2020-10-28 15:19:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 15:19:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-10-28 15:19:34,994 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 33 [2020-10-28 15:19:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:34,994 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-10-28 15:19:34,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:19:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-10-28 15:19:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:19:34,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:34,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:34,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:19:34,998 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash 65434425, now seen corresponding path program 2 times [2020-10-28 15:19:34,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:34,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081418284] [2020-10-28 15:19:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:40,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:40,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:19:40,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:19:40,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 15:19:40,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:40,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:19:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:19:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:19:40,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:40,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:40,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:40,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:40,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:40,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:40,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:19:40,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:40,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:40,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:40,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:40,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:19:40,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081418284] [2020-10-28 15:19:40,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:40,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:19:40,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014978556] [2020-10-28 15:19:40,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:19:40,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:40,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:19:40,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:19:40,129 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 5 states. [2020-10-28 15:19:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:40,227 INFO L93 Difference]: Finished difference Result 108 states and 147 transitions. [2020-10-28 15:19:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:19:40,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-28 15:19:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:40,229 INFO L225 Difference]: With dead ends: 108 [2020-10-28 15:19:40,229 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:19:40,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:19:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:19:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-28 15:19:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:19:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-10-28 15:19:40,240 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 35 [2020-10-28 15:19:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:40,241 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-10-28 15:19:40,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:19:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-10-28 15:19:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:19:40,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:40,245 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:40,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:19:40,245 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:40,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1620583317, now seen corresponding path program 3 times [2020-10-28 15:19:40,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:40,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851051762] [2020-10-28 15:19:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:40,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:40,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:40,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:41,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:42,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:45,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:45,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:19:45,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:19:45,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:19:45,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:45,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:45,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:19:45,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:19:45,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:19:45,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:45,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:45,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:45,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:45,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:45,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:45,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:19:45,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:45,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:45,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:45,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 15:19:45,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851051762] [2020-10-28 15:19:45,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:45,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 15:19:45,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948619630] [2020-10-28 15:19:45,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:19:45,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:45,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:19:45,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:19:45,504 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 8 states. [2020-10-28 15:19:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:45,741 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-10-28 15:19:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:19:45,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-28 15:19:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:45,742 INFO L225 Difference]: With dead ends: 99 [2020-10-28 15:19:45,742 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:19:45,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:19:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:19:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 15:19:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:19:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-28 15:19:45,751 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 38 [2020-10-28 15:19:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:45,751 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-28 15:19:45,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:19:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-28 15:19:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:19:45,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:45,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:45,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:19:45,753 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash 544432776, now seen corresponding path program 1 times [2020-10-28 15:19:45,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:45,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033478799] [2020-10-28 15:19:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:45,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:46,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:47,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:47,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:48,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:50,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:50,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:19:50,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:19:50,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:19:50,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:50,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:50,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:19:50,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:19:50,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:19:50,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:50,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:50,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:50,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:50,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:50,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:19:50,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:50,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:50,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:19:50,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033478799] [2020-10-28 15:19:50,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:50,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:19:50,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257299910] [2020-10-28 15:19:50,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:19:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:19:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:19:50,978 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 8 states. [2020-10-28 15:19:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:51,211 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2020-10-28 15:19:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:19:51,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-28 15:19:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:51,213 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:19:51,213 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 15:19:51,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:19:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 15:19:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 69. [2020-10-28 15:19:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:19:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-10-28 15:19:51,230 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 39 [2020-10-28 15:19:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:51,231 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-10-28 15:19:51,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:19:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-10-28 15:19:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:19:51,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:51,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:51,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:19:51,234 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash 189808560, now seen corresponding path program 1 times [2020-10-28 15:19:51,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:51,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745952456] [2020-10-28 15:19:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:51,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:51,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:51,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:51,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:51,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:51,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:52,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:56,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:56,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:19:56,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:56,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:56,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:56,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:56,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:19:56,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:56,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:56,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:19:56,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745952456] [2020-10-28 15:19:56,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:19:56,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:19:56,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780668500] [2020-10-28 15:19:56,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:19:56,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:56,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:19:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:19:56,379 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 7 states. [2020-10-28 15:19:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:56,729 INFO L93 Difference]: Finished difference Result 285 states and 374 transitions. [2020-10-28 15:19:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:19:56,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-28 15:19:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:56,732 INFO L225 Difference]: With dead ends: 285 [2020-10-28 15:19:56,732 INFO L226 Difference]: Without dead ends: 229 [2020-10-28 15:19:56,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:19:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-28 15:19:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 71. [2020-10-28 15:19:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 15:19:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-28 15:19:56,746 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 40 [2020-10-28 15:19:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:56,746 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-28 15:19:56,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:19:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-28 15:19:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:19:56,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:56,748 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:56,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:19:56,748 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:56,749 INFO L82 PathProgramCache]: Analyzing trace with hash -462923822, now seen corresponding path program 2 times [2020-10-28 15:19:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:56,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792039196] [2020-10-28 15:19:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:56,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:56,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:57,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:58,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:01,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:01,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:20:01,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:20:01,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:20:01,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:01,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:20:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:20:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:20:01,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:01,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:01,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:01,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:01,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:01,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:01,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:01,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:01,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:01,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:01,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:01,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:01,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:20:01,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792039196] [2020-10-28 15:20:01,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:01,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:20:01,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456984834] [2020-10-28 15:20:01,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:20:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:01,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:20:01,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:20:01,901 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 8 states. [2020-10-28 15:20:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:02,367 INFO L93 Difference]: Finished difference Result 328 states and 432 transitions. [2020-10-28 15:20:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:20:02,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-28 15:20:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:02,371 INFO L225 Difference]: With dead ends: 328 [2020-10-28 15:20:02,371 INFO L226 Difference]: Without dead ends: 272 [2020-10-28 15:20:02,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:20:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-28 15:20:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 73. [2020-10-28 15:20:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:20:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-28 15:20:02,400 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 42 [2020-10-28 15:20:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:02,400 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-28 15:20:02,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:20:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-28 15:20:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:20:02,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:02,401 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:02,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:20:02,402 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash -673517708, now seen corresponding path program 3 times [2020-10-28 15:20:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:02,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265031712] [2020-10-28 15:20:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:02,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:02,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:02,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:03,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:03,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:04,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:07,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:07,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:20:07,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:20:07,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 15:20:07,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:07,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:20:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:20:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:20:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:07,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:07,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:07,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:07,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:07,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:20:07,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:07,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:07,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:07,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-28 15:20:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 15:20:07,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265031712] [2020-10-28 15:20:07,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:07,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:20:07,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666038325] [2020-10-28 15:20:07,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:20:07,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:07,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:20:07,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:20:07,580 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 6 states. [2020-10-28 15:20:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:07,829 INFO L93 Difference]: Finished difference Result 180 states and 230 transitions. [2020-10-28 15:20:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:20:07,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-28 15:20:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:07,831 INFO L225 Difference]: With dead ends: 180 [2020-10-28 15:20:07,831 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 15:20:07,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:20:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 15:20:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 77. [2020-10-28 15:20:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:20:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-10-28 15:20:07,853 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 44 [2020-10-28 15:20:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:07,854 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-10-28 15:20:07,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:20:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-10-28 15:20:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:20:07,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:07,858 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:07,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:20:07,859 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:07,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1123053617, now seen corresponding path program 4 times [2020-10-28 15:20:07,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:07,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951650205] [2020-10-28 15:20:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:07,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:07,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:08,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:08,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:09,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:12,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:12,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:20:12,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:20:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:20:12,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:12,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:20:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:20:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:20:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:13,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:13,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:13,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:13,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:13,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:13,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:13,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:13,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:13,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:13,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:13,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:13,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-28 15:20:13,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951650205] [2020-10-28 15:20:13,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:13,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:20:13,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351089486] [2020-10-28 15:20:13,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:20:13,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:20:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:20:13,084 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 9 states. [2020-10-28 15:20:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:13,309 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2020-10-28 15:20:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:20:13,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-28 15:20:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:13,314 INFO L225 Difference]: With dead ends: 124 [2020-10-28 15:20:13,314 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 15:20:13,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:20:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 15:20:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-28 15:20:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 15:20:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2020-10-28 15:20:13,329 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 46 [2020-10-28 15:20:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:13,330 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2020-10-28 15:20:13,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:20:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2020-10-28 15:20:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:20:13,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:13,331 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:13,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:20:13,331 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 35931126, now seen corresponding path program 1 times [2020-10-28 15:20:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:13,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792042390] [2020-10-28 15:20:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:13,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:13,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:13,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:13,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:14,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:14,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:15,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:15,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:16,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:18,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:18,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:20:18,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:20:18,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 15:20:18,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:18,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:20:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:20:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:20:18,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:18,645 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 31 [2020-10-28 15:20:18,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:18,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:18,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:18,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:18,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:18,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:18,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:18,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:18,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:18,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:18,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:18,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 15:20:19,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792042390] [2020-10-28 15:20:19,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:19,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:20:19,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113853704] [2020-10-28 15:20:19,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:20:19,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:19,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:20:19,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:20:19,014 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 11 states. [2020-10-28 15:20:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:19,868 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-28 15:20:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:20:19,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-28 15:20:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:19,869 INFO L225 Difference]: With dead ends: 99 [2020-10-28 15:20:19,870 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 15:20:19,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:20:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 15:20:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-28 15:20:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:20:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-10-28 15:20:19,894 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 53 [2020-10-28 15:20:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:19,895 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-10-28 15:20:19,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:20:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-10-28 15:20:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:20:19,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:19,896 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:19,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:20:19,897 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:19,898 INFO L82 PathProgramCache]: Analyzing trace with hash 294096564, now seen corresponding path program 1 times [2020-10-28 15:20:19,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:19,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736088472] [2020-10-28 15:20:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:20,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:20,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:20,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:20,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:20,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:20,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:21,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:21,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:22,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:22,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:23,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:23,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:24,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:25,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:25,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:20:25,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 15:20:25,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-28 15:20:25,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:25,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:25,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:20:25,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:20:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:20:25,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:25,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:25,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:25,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:25,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:20:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736088472] [2020-10-28 15:20:25,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:25,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:20:25,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853664626] [2020-10-28 15:20:25,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:20:25,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:25,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:20:25,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:20:25,469 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 13 states. [2020-10-28 15:20:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:26,583 INFO L93 Difference]: Finished difference Result 216 states and 277 transitions. [2020-10-28 15:20:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:20:26,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-28 15:20:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:26,585 INFO L225 Difference]: With dead ends: 216 [2020-10-28 15:20:26,585 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 15:20:26,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:20:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 15:20:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-28 15:20:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 15:20:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2020-10-28 15:20:26,609 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 53 [2020-10-28 15:20:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:26,609 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2020-10-28 15:20:26,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:20:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2020-10-28 15:20:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:20:26,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:26,610 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:26,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:20:26,611 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:26,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1243932552, now seen corresponding path program 2 times [2020-10-28 15:20:26,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:26,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759772214] [2020-10-28 15:20:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:27,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:27,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:27,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:27,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:27,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:28,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:28,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:28,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:29,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:29,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:30,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:30,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:31,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:31,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:20:31,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 15:20:31,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 15:20:31,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:31,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:31,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:20:31,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:20:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:20:31,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:32,028 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-28 15:20:32,174 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-28 15:20:32,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:32,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:32,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:32,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:32,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:32,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:32,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:32,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:32,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 15:20:32,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759772214] [2020-10-28 15:20:32,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:32,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:20:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517238284] [2020-10-28 15:20:32,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:20:32,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:20:32,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:20:32,354 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand 14 states. [2020-10-28 15:20:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:33,754 INFO L93 Difference]: Finished difference Result 268 states and 341 transitions. [2020-10-28 15:20:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:20:33,755 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-28 15:20:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:33,756 INFO L225 Difference]: With dead ends: 268 [2020-10-28 15:20:33,757 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 15:20:33,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:20:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 15:20:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-10-28 15:20:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 15:20:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2020-10-28 15:20:33,779 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 53 [2020-10-28 15:20:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:33,779 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2020-10-28 15:20:33,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:20:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2020-10-28 15:20:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:20:33,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:33,780 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:33,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:20:33,780 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash 160083058, now seen corresponding path program 1 times [2020-10-28 15:20:33,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:33,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276657264] [2020-10-28 15:20:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:33,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:34,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:20:34,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:34,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:34,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:34,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:34,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:34,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:34,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:20:34,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:34,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:20:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 15:20:34,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276657264] [2020-10-28 15:20:34,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:34,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:20:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166482190] [2020-10-28 15:20:34,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:20:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:20:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:20:34,272 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand 9 states. [2020-10-28 15:20:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:34,797 INFO L93 Difference]: Finished difference Result 248 states and 315 transitions. [2020-10-28 15:20:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:20:34,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-28 15:20:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:34,800 INFO L225 Difference]: With dead ends: 248 [2020-10-28 15:20:34,800 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 15:20:34,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:20:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 15:20:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 183. [2020-10-28 15:20:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 15:20:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 232 transitions. [2020-10-28 15:20:34,842 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 232 transitions. Word has length 53 [2020-10-28 15:20:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:34,842 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 232 transitions. [2020-10-28 15:20:34,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:20:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 232 transitions. [2020-10-28 15:20:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:20:34,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:34,843 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:34,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:20:34,844 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1119780620, now seen corresponding path program 1 times [2020-10-28 15:20:34,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:34,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848683519] [2020-10-28 15:20:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:35,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:35,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:35,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:36,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:36,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:37,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:37,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:39,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:39,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:20:39,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:20:39,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:20:39,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:39,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:39,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:20:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:20:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:20:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:40,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:40,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:40,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:40,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:40,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:20:40,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:40,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:40,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:40,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:40,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:40,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 15:20:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848683519] [2020-10-28 15:20:40,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:40,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:20:40,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605168461] [2020-10-28 15:20:40,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:20:40,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:20:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:20:40,486 INFO L87 Difference]: Start difference. First operand 183 states and 232 transitions. Second operand 12 states. [2020-10-28 15:20:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:41,332 INFO L93 Difference]: Finished difference Result 302 states and 388 transitions. [2020-10-28 15:20:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:20:41,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-28 15:20:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:41,335 INFO L225 Difference]: With dead ends: 302 [2020-10-28 15:20:41,335 INFO L226 Difference]: Without dead ends: 248 [2020-10-28 15:20:41,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:20:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-28 15:20:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 188. [2020-10-28 15:20:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-28 15:20:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2020-10-28 15:20:41,373 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 53 [2020-10-28 15:20:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:41,373 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2020-10-28 15:20:41,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:20:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2020-10-28 15:20:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:20:41,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:41,374 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:41,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:20:41,375 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:41,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:41,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2083311092, now seen corresponding path program 1 times [2020-10-28 15:20:41,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:41,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657858134] [2020-10-28 15:20:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:41,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:41,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:41,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:41,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:42,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:42,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:43,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:43,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:43,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:46,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:20:46,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:46,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:46,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:46,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:46,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:46,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:46,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:46,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:46,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:46,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:46,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 15:20:46,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657858134] [2020-10-28 15:20:46,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:46,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:20:46,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551556349] [2020-10-28 15:20:46,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:20:46,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:46,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:20:46,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:20:46,949 INFO L87 Difference]: Start difference. First operand 188 states and 235 transitions. Second operand 14 states. [2020-10-28 15:20:48,243 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-28 15:20:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:48,546 INFO L93 Difference]: Finished difference Result 350 states and 439 transitions. [2020-10-28 15:20:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:20:48,547 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-28 15:20:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:48,549 INFO L225 Difference]: With dead ends: 350 [2020-10-28 15:20:48,549 INFO L226 Difference]: Without dead ends: 275 [2020-10-28 15:20:48,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:20:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-28 15:20:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 200. [2020-10-28 15:20:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 15:20:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 249 transitions. [2020-10-28 15:20:48,597 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 249 transitions. Word has length 53 [2020-10-28 15:20:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:48,597 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 249 transitions. [2020-10-28 15:20:48,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:20:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 249 transitions. [2020-10-28 15:20:48,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:20:48,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:48,604 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:48,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:20:48,604 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash 545281976, now seen corresponding path program 2 times [2020-10-28 15:20:48,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:48,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083902660] [2020-10-28 15:20:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:48,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:48,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:48,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:48,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:49,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:49,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:49,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:50,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:50,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:50,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:51,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:53,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:53,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:53,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 15:20:53,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 15:20:53,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:20:53,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:53,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:53,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:20:53,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:20:53,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:20:53,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:54,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:20:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:54,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:54,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:20:54,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:20:54,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:20:54,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:20:54,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:20:54,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:20:54,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:20:54,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:20:54,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:20:54,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:20:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 15:20:54,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083902660] [2020-10-28 15:20:54,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:20:54,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:20:54,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970640394] [2020-10-28 15:20:54,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:20:54,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:20:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:20:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:20:54,139 INFO L87 Difference]: Start difference. First operand 200 states and 249 transitions. Second operand 14 states. [2020-10-28 15:20:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:20:57,063 INFO L93 Difference]: Finished difference Result 552 states and 718 transitions. [2020-10-28 15:20:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 15:20:57,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-28 15:20:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:20:57,066 INFO L225 Difference]: With dead ends: 552 [2020-10-28 15:20:57,066 INFO L226 Difference]: Without dead ends: 476 [2020-10-28 15:20:57,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=807, Invalid=2853, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:20:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-28 15:20:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 261. [2020-10-28 15:20:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-28 15:20:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 332 transitions. [2020-10-28 15:20:57,131 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 332 transitions. Word has length 53 [2020-10-28 15:20:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:20:57,131 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 332 transitions. [2020-10-28 15:20:57,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:20:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 332 transitions. [2020-10-28 15:20:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 15:20:57,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:20:57,133 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:20:57,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:20:57,133 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:20:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:20:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2086525767, now seen corresponding path program 3 times [2020-10-28 15:20:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:20:57,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803142382] [2020-10-28 15:20:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:20:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:20:57,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:57,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:57,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:20:59,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:00,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:00,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:00,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:01,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:01,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:01,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:02,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:02,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:02,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:21:02,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 15:21:02,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 15:21:02,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:02,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:21:02,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:21:02,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:21:02,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:02,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:02,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:02,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:02,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:02,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:02,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:02,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:02,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:02,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:02,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:02,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:02,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 15:21:02,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803142382] [2020-10-28 15:21:02,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:02,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:21:02,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102883923] [2020-10-28 15:21:02,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:21:02,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:21:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:21:02,744 INFO L87 Difference]: Start difference. First operand 261 states and 332 transitions. Second operand 11 states. [2020-10-28 15:21:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:03,593 INFO L93 Difference]: Finished difference Result 402 states and 517 transitions. [2020-10-28 15:21:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:21:03,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-28 15:21:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:03,596 INFO L225 Difference]: With dead ends: 402 [2020-10-28 15:21:03,596 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 15:21:03,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:21:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 15:21:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2020-10-28 15:21:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 15:21:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 333 transitions. [2020-10-28 15:21:03,654 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 333 transitions. Word has length 55 [2020-10-28 15:21:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:03,655 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 333 transitions. [2020-10-28 15:21:03,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:21:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 333 transitions. [2020-10-28 15:21:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 15:21:03,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:03,656 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:03,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:21:03,656 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 794564345, now seen corresponding path program 2 times [2020-10-28 15:21:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:03,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400983464] [2020-10-28 15:21:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:03,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:03,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:04,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:04,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:04,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:05,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:05,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:08,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:08,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:08,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 15:21:08,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:21:08,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 15:21:08,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:08,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:21:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:21:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:21:08,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:08,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:08,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:08,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:08,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:08,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:08,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:08,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:08,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:08,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:21:08,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400983464] [2020-10-28 15:21:08,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:08,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:21:08,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852842528] [2020-10-28 15:21:08,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:21:08,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:08,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:21:08,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:21:08,965 INFO L87 Difference]: Start difference. First operand 263 states and 333 transitions. Second operand 10 states. [2020-10-28 15:21:09,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:09,526 INFO L93 Difference]: Finished difference Result 421 states and 546 transitions. [2020-10-28 15:21:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:21:09,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-28 15:21:09,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:09,530 INFO L225 Difference]: With dead ends: 421 [2020-10-28 15:21:09,530 INFO L226 Difference]: Without dead ends: 414 [2020-10-28 15:21:09,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:21:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-28 15:21:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 296. [2020-10-28 15:21:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-28 15:21:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 378 transitions. [2020-10-28 15:21:09,599 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 378 transitions. Word has length 55 [2020-10-28 15:21:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:09,599 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 378 transitions. [2020-10-28 15:21:09,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:21:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 378 transitions. [2020-10-28 15:21:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 15:21:09,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:09,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:09,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:21:09,601 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:09,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1042524664, now seen corresponding path program 2 times [2020-10-28 15:21:09,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:09,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411446135] [2020-10-28 15:21:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:09,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:09,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:09,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:09,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:10,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:10,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:10,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:10,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:11,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:11,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:11,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:14,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:14,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:21:14,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 15:21:14,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 15:21:14,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:14,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:21:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 15:21:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:21:14,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:14,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:14,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:14,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:14,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:14,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:14,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:14,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:14,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:14,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:14,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:14,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-28 15:21:14,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411446135] [2020-10-28 15:21:14,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:14,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:21:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647064138] [2020-10-28 15:21:14,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:21:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:21:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:21:14,728 INFO L87 Difference]: Start difference. First operand 296 states and 378 transitions. Second operand 6 states. [2020-10-28 15:21:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:14,949 INFO L93 Difference]: Finished difference Result 555 states and 709 transitions. [2020-10-28 15:21:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:21:14,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 15:21:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:14,951 INFO L225 Difference]: With dead ends: 555 [2020-10-28 15:21:14,952 INFO L226 Difference]: Without dead ends: 288 [2020-10-28 15:21:14,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:21:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-28 15:21:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 246. [2020-10-28 15:21:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-28 15:21:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 287 transitions. [2020-10-28 15:21:15,006 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 287 transitions. Word has length 56 [2020-10-28 15:21:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:15,006 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 287 transitions. [2020-10-28 15:21:15,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:21:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 287 transitions. [2020-10-28 15:21:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 15:21:15,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:15,007 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:15,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:21:15,008 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:15,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2089106894, now seen corresponding path program 3 times [2020-10-28 15:21:15,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:15,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565603294] [2020-10-28 15:21:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:15,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:15,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:15,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:16,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:16,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:18,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:18,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:20,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:21:20,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:21:20,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:20,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:20,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:20,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:20,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:20,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:20,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:20,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:20,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:20,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 15:21:20,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565603294] [2020-10-28 15:21:20,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:20,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:21:20,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823899575] [2020-10-28 15:21:20,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:21:20,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:20,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:21:20,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:21:20,168 INFO L87 Difference]: Start difference. First operand 246 states and 287 transitions. Second operand 7 states. [2020-10-28 15:21:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:20,470 INFO L93 Difference]: Finished difference Result 334 states and 387 transitions. [2020-10-28 15:21:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:21:20,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-28 15:21:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:20,472 INFO L225 Difference]: With dead ends: 334 [2020-10-28 15:21:20,472 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 15:21:20,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:21:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 15:21:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 210. [2020-10-28 15:21:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 15:21:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 246 transitions. [2020-10-28 15:21:20,520 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 246 transitions. Word has length 62 [2020-10-28 15:21:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:20,521 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 246 transitions. [2020-10-28 15:21:20,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:21:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 246 transitions. [2020-10-28 15:21:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 15:21:20,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:20,522 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:20,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:21:20,522 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash 782118754, now seen corresponding path program 4 times [2020-10-28 15:21:20,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:20,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897295206] [2020-10-28 15:21:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:20,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:20,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:20,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:21,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:21,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:23,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:25,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:25,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 15:21:25,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:21:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:21:25,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:25,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:21:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:21:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:21:25,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:25,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:25,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:25,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:25,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:25,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:25,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:25,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:25,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:25,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:25,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:25,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-28 15:21:25,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897295206] [2020-10-28 15:21:25,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:25,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:21:25,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501637709] [2020-10-28 15:21:25,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:21:25,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:25,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:21:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:21:25,897 INFO L87 Difference]: Start difference. First operand 210 states and 246 transitions. Second operand 10 states. [2020-10-28 15:21:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:26,297 INFO L93 Difference]: Finished difference Result 248 states and 288 transitions. [2020-10-28 15:21:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:21:26,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-28 15:21:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:26,299 INFO L225 Difference]: With dead ends: 248 [2020-10-28 15:21:26,299 INFO L226 Difference]: Without dead ends: 170 [2020-10-28 15:21:26,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:21:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-28 15:21:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-28 15:21:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 15:21:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2020-10-28 15:21:26,336 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 63 [2020-10-28 15:21:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:26,337 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2020-10-28 15:21:26,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:21:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2020-10-28 15:21:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 15:21:26,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:26,338 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:26,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:21:26,338 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:26,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 829211431, now seen corresponding path program 5 times [2020-10-28 15:21:26,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:26,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122041147] [2020-10-28 15:21:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:26,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:26,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:26,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:26,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:30,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:30,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:31,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:31,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:31,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 15:21:31,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:21:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:21:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:31,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:21:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:21:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:21:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:31,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:31,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:31,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 15:21:31,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122041147] [2020-10-28 15:21:31,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:31,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:21:31,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490888131] [2020-10-28 15:21:31,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:21:31,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:21:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:21:31,560 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand 8 states. [2020-10-28 15:21:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:31,892 INFO L93 Difference]: Finished difference Result 474 states and 568 transitions. [2020-10-28 15:21:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:21:31,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 15:21:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:31,895 INFO L225 Difference]: With dead ends: 474 [2020-10-28 15:21:31,896 INFO L226 Difference]: Without dead ends: 397 [2020-10-28 15:21:31,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:21:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-28 15:21:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 194. [2020-10-28 15:21:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-28 15:21:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2020-10-28 15:21:31,941 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 65 [2020-10-28 15:21:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:31,942 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2020-10-28 15:21:31,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:21:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2020-10-28 15:21:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 15:21:31,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:31,943 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:31,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:21:31,943 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:31,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1159366228, now seen corresponding path program 6 times [2020-10-28 15:21:31,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:31,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274773794] [2020-10-28 15:21:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:32,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:32,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:32,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:32,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:35,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:35,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:35,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:35,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:35,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:21:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:21:36,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:21:36,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:37,295 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-28 15:21:37,437 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-10-28 15:21:37,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:37,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:37,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:37,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:37,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:37,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:37,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 15:21:37,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274773794] [2020-10-28 15:21:37,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:37,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:21:37,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585181298] [2020-10-28 15:21:37,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:21:37,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:21:37,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:21:37,829 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand 13 states. [2020-10-28 15:21:38,242 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-28 15:21:38,450 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 15:21:38,823 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-28 15:21:39,020 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-28 15:21:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:39,128 INFO L93 Difference]: Finished difference Result 365 states and 429 transitions. [2020-10-28 15:21:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:21:39,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 15:21:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:39,130 INFO L225 Difference]: With dead ends: 365 [2020-10-28 15:21:39,134 INFO L226 Difference]: Without dead ends: 280 [2020-10-28 15:21:39,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:21:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-28 15:21:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 182. [2020-10-28 15:21:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-28 15:21:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 215 transitions. [2020-10-28 15:21:39,183 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 215 transitions. Word has length 67 [2020-10-28 15:21:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:39,183 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 215 transitions. [2020-10-28 15:21:39,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:21:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 215 transitions. [2020-10-28 15:21:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:21:39,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:39,184 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:39,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:21:39,185 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1575577279, now seen corresponding path program 7 times [2020-10-28 15:21:39,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:39,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027509676] [2020-10-28 15:21:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:39,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:40,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:41,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:42,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:44,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:44,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:44,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:21:44,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:21:44,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-28 15:21:44,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:44,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:44,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:21:44,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:21:44,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:21:44,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:44,954 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-28 15:21:45,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:45,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:45,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:45,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-28 15:21:45,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027509676] [2020-10-28 15:21:45,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:45,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:21:45,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452629173] [2020-10-28 15:21:45,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:21:45,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:45,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:21:45,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:21:45,038 INFO L87 Difference]: Start difference. First operand 182 states and 215 transitions. Second operand 14 states. [2020-10-28 15:21:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:45,944 INFO L93 Difference]: Finished difference Result 428 states and 506 transitions. [2020-10-28 15:21:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:21:45,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-28 15:21:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:45,946 INFO L225 Difference]: With dead ends: 428 [2020-10-28 15:21:45,946 INFO L226 Difference]: Without dead ends: 379 [2020-10-28 15:21:45,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:21:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-28 15:21:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 274. [2020-10-28 15:21:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-28 15:21:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 328 transitions. [2020-10-28 15:21:46,020 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 328 transitions. Word has length 74 [2020-10-28 15:21:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:46,020 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 328 transitions. [2020-10-28 15:21:46,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:21:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 328 transitions. [2020-10-28 15:21:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:21:46,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:46,021 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:46,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:21:46,022 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash 37548163, now seen corresponding path program 8 times [2020-10-28 15:21:46,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:46,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794668345] [2020-10-28 15:21:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:46,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:48,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:50,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:51,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:51,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:21:51,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:21:51,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 15:21:51,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:51,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:51,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:21:51,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:21:51,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:21:51,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:51,682 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-10-28 15:21:51,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:51,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:51,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:51,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:51,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:51,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:51,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:51,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:51,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:51,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:51,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:51,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-28 15:21:51,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794668345] [2020-10-28 15:21:51,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:51,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:21:51,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397670027] [2020-10-28 15:21:51,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:21:51,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:21:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:21:51,790 INFO L87 Difference]: Start difference. First operand 274 states and 328 transitions. Second operand 15 states. [2020-10-28 15:21:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:53,436 INFO L93 Difference]: Finished difference Result 884 states and 1063 transitions. [2020-10-28 15:21:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:21:53,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-28 15:21:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:53,439 INFO L225 Difference]: With dead ends: 884 [2020-10-28 15:21:53,439 INFO L226 Difference]: Without dead ends: 695 [2020-10-28 15:21:53,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:21:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-28 15:21:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 457. [2020-10-28 15:21:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-10-28 15:21:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 551 transitions. [2020-10-28 15:21:53,555 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 551 transitions. Word has length 74 [2020-10-28 15:21:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:53,555 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 551 transitions. [2020-10-28 15:21:53,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:21:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 551 transitions. [2020-10-28 15:21:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:21:53,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:53,557 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:53,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:21:53,557 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:53,558 INFO L82 PathProgramCache]: Analyzing trace with hash -668406019, now seen corresponding path program 9 times [2020-10-28 15:21:53,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:53,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227170182] [2020-10-28 15:21:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:53,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:54,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:54,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:21:54,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:54,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-28 15:21:54,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:54,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:54,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:21:54,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:21:54,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 15:21:54,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:54,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:21:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:54,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:21:54,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:21:54,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:21:54,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:21:54,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:21:54,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:21:54,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:21:54,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:21:54,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:21:54,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:21:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 15:21:54,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227170182] [2020-10-28 15:21:54,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:21:54,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:21:54,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462170898] [2020-10-28 15:21:54,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:21:54,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:21:54,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:21:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:21:54,417 INFO L87 Difference]: Start difference. First operand 457 states and 551 transitions. Second operand 11 states. [2020-10-28 15:21:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:21:55,182 INFO L93 Difference]: Finished difference Result 782 states and 930 transitions. [2020-10-28 15:21:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:21:55,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-28 15:21:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:21:55,185 INFO L225 Difference]: With dead ends: 782 [2020-10-28 15:21:55,185 INFO L226 Difference]: Without dead ends: 775 [2020-10-28 15:21:55,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:21:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-28 15:21:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 628. [2020-10-28 15:21:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-10-28 15:21:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 760 transitions. [2020-10-28 15:21:55,348 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 760 transitions. Word has length 74 [2020-10-28 15:21:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:21:55,348 INFO L481 AbstractCegarLoop]: Abstraction has 628 states and 760 transitions. [2020-10-28 15:21:55,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:21:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 760 transitions. [2020-10-28 15:21:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:21:55,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:21:55,350 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:21:55,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:21:55,351 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:21:55,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:21:55,351 INFO L82 PathProgramCache]: Analyzing trace with hash -527857409, now seen corresponding path program 10 times [2020-10-28 15:21:55,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:21:55,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118309256] [2020-10-28 15:21:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:21:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:21:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:55,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:55,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:56,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:56,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:57,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:58,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:58,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:21:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:00,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:00,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:22:00,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:22:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 15:22:00,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:00,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:22:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:22:00,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:22:00,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:00,997 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-28 15:22:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:22:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:01,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:01,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:22:01,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:22:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:22:01,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:01,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:22:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:22:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:22:01,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-28 15:22:01,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118309256] [2020-10-28 15:22:01,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:22:01,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:22:01,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543861758] [2020-10-28 15:22:01,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:22:01,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:22:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:22:01,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:22:01,075 INFO L87 Difference]: Start difference. First operand 628 states and 760 transitions. Second operand 11 states. [2020-10-28 15:22:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:22:02,131 INFO L93 Difference]: Finished difference Result 1023 states and 1213 transitions. [2020-10-28 15:22:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:22:02,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-28 15:22:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:22:02,137 INFO L225 Difference]: With dead ends: 1023 [2020-10-28 15:22:02,137 INFO L226 Difference]: Without dead ends: 897 [2020-10-28 15:22:02,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:22:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-10-28 15:22:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 765. [2020-10-28 15:22:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-10-28 15:22:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 923 transitions. [2020-10-28 15:22:02,345 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 923 transitions. Word has length 74 [2020-10-28 15:22:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:22:02,346 INFO L481 AbstractCegarLoop]: Abstraction has 765 states and 923 transitions. [2020-10-28 15:22:02,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:22:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 923 transitions. [2020-10-28 15:22:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:22:02,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:22:02,348 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:22:02,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:22:02,349 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:22:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:22:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash -8874497, now seen corresponding path program 11 times [2020-10-28 15:22:02,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:22:02,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149728755] [2020-10-28 15:22:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:22:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:02,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:02,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:02,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:03,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:03,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:03,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:07,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:07,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:22:07,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:22:07,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 15:22:07,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:07,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:22:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:22:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:22:07,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:07,943 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-28 15:22:08,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:22:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:08,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:08,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:08,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:22:08,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:22:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:22:08,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:08,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:22:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:22:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:22:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 15:22:08,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149728755] [2020-10-28 15:22:08,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:22:08,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:22:08,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593396666] [2020-10-28 15:22:08,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:22:08,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:22:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:22:08,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:22:08,405 INFO L87 Difference]: Start difference. First operand 765 states and 923 transitions. Second operand 18 states. [2020-10-28 15:22:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:22:11,484 INFO L93 Difference]: Finished difference Result 1222 states and 1429 transitions. [2020-10-28 15:22:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:22:11,484 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-10-28 15:22:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:22:11,489 INFO L225 Difference]: With dead ends: 1222 [2020-10-28 15:22:11,489 INFO L226 Difference]: Without dead ends: 1143 [2020-10-28 15:22:11,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:22:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-10-28 15:22:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 807. [2020-10-28 15:22:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 807 states. [2020-10-28 15:22:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 961 transitions. [2020-10-28 15:22:11,771 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 961 transitions. Word has length 74 [2020-10-28 15:22:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:22:11,772 INFO L481 AbstractCegarLoop]: Abstraction has 807 states and 961 transitions. [2020-10-28 15:22:11,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:22:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 961 transitions. [2020-10-28 15:22:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:22:11,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:22:11,774 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:22:11,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:22:11,775 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:22:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:22:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1546903613, now seen corresponding path program 12 times [2020-10-28 15:22:11,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:22:11,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695265843] [2020-10-28 15:22:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:22:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:11,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:12,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:12,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:12,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:12,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:13,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:15,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:16,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:16,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:16,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:16,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:22:16,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:22:16,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:22:16,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:16,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:22:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:22:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:22:16,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:22:17,438 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 48 [2020-10-28 15:22:17,692 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 53 [2020-10-28 15:22:17,952 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2020-10-28 15:22:18,201 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-28 15:22:18,474 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-28 15:22:18,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:22:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:18,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:22:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:22:18,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-28 15:22:18,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695265843] [2020-10-28 15:22:18,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:22:18,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:22:18,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98052588] [2020-10-28 15:22:18,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:22:18,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:22:18,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:22:18,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:22:18,605 INFO L87 Difference]: Start difference. First operand 807 states and 961 transitions. Second operand 18 states. [2020-10-28 15:22:19,231 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 15:22:19,445 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 15:22:19,652 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 15:22:19,852 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 15:22:20,074 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-28 15:22:20,293 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-28 15:22:20,625 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-28 15:22:20,962 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-28 15:22:21,228 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-28 15:22:21,545 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-28 15:22:21,862 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-28 15:22:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:22:22,616 INFO L93 Difference]: Finished difference Result 1343 states and 1558 transitions. [2020-10-28 15:22:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:22:22,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-10-28 15:22:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:22:22,620 INFO L225 Difference]: With dead ends: 1343 [2020-10-28 15:22:22,620 INFO L226 Difference]: Without dead ends: 1170 [2020-10-28 15:22:22,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:22:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2020-10-28 15:22:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 818. [2020-10-28 15:22:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2020-10-28 15:22:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 967 transitions. [2020-10-28 15:22:22,831 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 967 transitions. Word has length 74 [2020-10-28 15:22:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:22:22,832 INFO L481 AbstractCegarLoop]: Abstraction has 818 states and 967 transitions. [2020-10-28 15:22:22,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:22:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 967 transitions. [2020-10-28 15:22:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:22:22,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:22:22,834 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:22:22,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:22:22,834 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:22:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:22:22,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1259866683, now seen corresponding path program 13 times [2020-10-28 15:22:22,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:22:22,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114127223] [2020-10-28 15:22:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:22:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:22,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:23,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:23,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:24,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:25,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:26,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:26,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:27,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:27,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:27,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:27,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:22:27,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:28,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:22:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:28,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:28,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:22:28,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:22:28,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:22:28,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:28,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:28,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:22:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:22:28,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:22:28,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-28 15:22:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114127223] [2020-10-28 15:22:28,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:22:28,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:22:28,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928828253] [2020-10-28 15:22:28,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:22:28,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:22:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:22:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:22:28,533 INFO L87 Difference]: Start difference. First operand 818 states and 967 transitions. Second operand 14 states. [2020-10-28 15:22:30,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:22:30,632 INFO L93 Difference]: Finished difference Result 1122 states and 1286 transitions. [2020-10-28 15:22:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:22:30,633 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-28 15:22:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:22:30,636 INFO L225 Difference]: With dead ends: 1122 [2020-10-28 15:22:30,636 INFO L226 Difference]: Without dead ends: 981 [2020-10-28 15:22:30,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:22:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2020-10-28 15:22:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 810. [2020-10-28 15:22:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 810 states. [2020-10-28 15:22:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 939 transitions. [2020-10-28 15:22:30,896 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 939 transitions. Word has length 74 [2020-10-28 15:22:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:22:30,897 INFO L481 AbstractCegarLoop]: Abstraction has 810 states and 939 transitions. [2020-10-28 15:22:30,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:22:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 939 transitions. [2020-10-28 15:22:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:22:30,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:22:30,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:22:30,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:22:30,900 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:22:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:22:30,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2059946815, now seen corresponding path program 3 times [2020-10-28 15:22:30,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:22:30,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733055781] [2020-10-28 15:22:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:22:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:31,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:31,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:31,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:31,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:31,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:22:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:22:35,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:22:35,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:36,239 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-10-28 15:22:36,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:22:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:36,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:36,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:36,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:22:36,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:22:36,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:22:36,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:36,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:22:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:22:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:22:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 15:22:36,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733055781] [2020-10-28 15:22:36,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:22:36,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:22:36,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022079096] [2020-10-28 15:22:36,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:22:36,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:22:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:22:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:22:36,835 INFO L87 Difference]: Start difference. First operand 810 states and 939 transitions. Second operand 16 states. [2020-10-28 15:22:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:22:39,098 INFO L93 Difference]: Finished difference Result 1177 states and 1351 transitions. [2020-10-28 15:22:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:22:39,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-28 15:22:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:22:39,103 INFO L225 Difference]: With dead ends: 1177 [2020-10-28 15:22:39,103 INFO L226 Difference]: Without dead ends: 1131 [2020-10-28 15:22:39,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:22:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2020-10-28 15:22:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 870. [2020-10-28 15:22:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 870 states. [2020-10-28 15:22:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 999 transitions. [2020-10-28 15:22:39,357 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 999 transitions. Word has length 74 [2020-10-28 15:22:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:22:39,357 INFO L481 AbstractCegarLoop]: Abstraction has 870 states and 999 transitions. [2020-10-28 15:22:39,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:22:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 999 transitions. [2020-10-28 15:22:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:22:39,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:22:39,360 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:22:39,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:22:39,360 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:22:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:22:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash 521917699, now seen corresponding path program 4 times [2020-10-28 15:22:39,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:22:39,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654198741] [2020-10-28 15:22:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:22:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:40,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:41,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:43,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:43,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:44,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:44,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:22:44,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:22:44,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 15:22:44,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:44,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:22:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:22:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:22:44,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:45,469 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2020-10-28 15:22:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:22:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:45,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:45,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:45,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:22:45,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:22:45,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:22:45,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:45,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:45,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:22:45,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:22:45,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:22:45,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:22:45,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654198741] [2020-10-28 15:22:45,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:22:45,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:22:45,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064867361] [2020-10-28 15:22:45,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:22:45,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:22:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:22:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:22:45,594 INFO L87 Difference]: Start difference. First operand 870 states and 999 transitions. Second operand 17 states. [2020-10-28 15:22:47,247 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-28 15:22:47,588 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-28 15:22:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:22:47,960 INFO L93 Difference]: Finished difference Result 1428 states and 1615 transitions. [2020-10-28 15:22:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:22:47,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-10-28 15:22:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:22:47,965 INFO L225 Difference]: With dead ends: 1428 [2020-10-28 15:22:47,965 INFO L226 Difference]: Without dead ends: 1331 [2020-10-28 15:22:47,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:22:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-10-28 15:22:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 903. [2020-10-28 15:22:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 903 states. [2020-10-28 15:22:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1034 transitions. [2020-10-28 15:22:48,225 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1034 transitions. Word has length 74 [2020-10-28 15:22:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:22:48,225 INFO L481 AbstractCegarLoop]: Abstraction has 903 states and 1034 transitions. [2020-10-28 15:22:48,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:22:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1034 transitions. [2020-10-28 15:22:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 15:22:48,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:22:48,227 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:22:48,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:22:48,228 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:22:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:22:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1067925602, now seen corresponding path program 14 times [2020-10-28 15:22:48,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:22:48,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529395457] [2020-10-28 15:22:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:22:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:48,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:48,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:48,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:48,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:49,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:49,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:50,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:53,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:53,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 15:22:53,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:22:53,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:22:53,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:53,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:22:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 15:22:53,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 15:22:53,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:53,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:22:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:53,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:53,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:22:53,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:22:53,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:22:53,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:22:53,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:22:53,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:22:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:22:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:22:53,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:22:53,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:22:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 15:22:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529395457] [2020-10-28 15:22:53,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:22:53,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:22:53,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441994656] [2020-10-28 15:22:53,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:22:53,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:22:53,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:22:53,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:22:53,649 INFO L87 Difference]: Start difference. First operand 903 states and 1034 transitions. Second operand 12 states. [2020-10-28 15:22:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:22:54,602 INFO L93 Difference]: Finished difference Result 1336 states and 1536 transitions. [2020-10-28 15:22:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:22:54,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-10-28 15:22:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:22:54,607 INFO L225 Difference]: With dead ends: 1336 [2020-10-28 15:22:54,607 INFO L226 Difference]: Without dead ends: 1329 [2020-10-28 15:22:54,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:22:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2020-10-28 15:22:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1016. [2020-10-28 15:22:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2020-10-28 15:22:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1155 transitions. [2020-10-28 15:22:54,952 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1155 transitions. Word has length 76 [2020-10-28 15:22:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:22:54,952 INFO L481 AbstractCegarLoop]: Abstraction has 1016 states and 1155 transitions. [2020-10-28 15:22:54,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:22:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1155 transitions. [2020-10-28 15:22:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 15:22:54,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:22:54,955 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:22:54,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:22:54,955 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:22:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:22:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash 370289577, now seen corresponding path program 15 times [2020-10-28 15:22:54,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:22:54,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681829090] [2020-10-28 15:22:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:22:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:22:55,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:55,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:55,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:55,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:56,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:22:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking...