/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/array-examples/standard_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:51:31,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:51:31,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:51:31,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:51:31,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:51:31,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:51:31,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:51:31,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:51:31,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:51:31,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:51:31,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:51:31,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:51:31,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:51:31,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:51:31,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:51:31,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:51:31,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:51:31,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:51:31,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:51:31,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:51:31,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:51:31,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:51:31,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:51:31,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:51:31,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:51:31,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:51:31,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:51:31,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:51:31,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:51:31,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:51:31,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:51:31,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:51:31,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:51:31,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:51:31,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:51:31,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:51:31,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:51:31,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:51:31,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:51:31,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:51:31,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:51:31,784 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 08:51:31,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:51:31,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:51:31,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:51:31,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:51:31,836 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:51:31,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:51:31,836 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:51:31,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:51:31,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:51:31,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:51:31,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:51:31,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:51:31,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:51:31,839 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:51:31,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:51:31,839 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:51:31,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:51:31,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:51:31,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:51:31,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:51:31,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:51:31,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:31,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:51:31,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:51:31,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:51:31,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:51:31,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:51:31,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:51:31,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:51:31,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:51:32,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:51:32,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:51:32,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:51:32,285 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:51:32,285 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:51:32,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2020-10-28 08:51:32,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b02363f5b/9c96ea2af3e147e5b98a552b1d9049db/FLAG3f4c50d8f [2020-10-28 08:51:33,088 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:51:33,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2020-10-28 08:51:33,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b02363f5b/9c96ea2af3e147e5b98a552b1d9049db/FLAG3f4c50d8f [2020-10-28 08:51:33,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b02363f5b/9c96ea2af3e147e5b98a552b1d9049db [2020-10-28 08:51:33,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:51:33,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:51:33,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:33,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:51:33,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:51:33,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7542669a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33, skipping insertion in model container [2020-10-28 08:51:33,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:51:33,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:51:33,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:33,702 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:51:33,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:33,743 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:51:33,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33 WrapperNode [2020-10-28 08:51:33,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:33,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:51:33,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:51:33,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:51:33,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (1/1) ... [2020-10-28 08:51:33,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:51:33,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:51:33,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:51:33,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:51:33,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (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 08:51:33,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:51:33,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:51:33,872 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:51:33,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:51:33,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:51:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:51:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:51:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:51:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:51:33,873 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:51:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:51:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:51:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:51:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:51:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:51:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:51:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:51:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:51:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:51:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:34,366 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:34,366 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 08:51:34,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:34 BoogieIcfgContainer [2020-10-28 08:51:34,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:34,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:34,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:34,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:34,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:51:33" (1/3) ... [2020-10-28 08:51:34,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf34cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:34, skipping insertion in model container [2020-10-28 08:51:34,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:33" (2/3) ... [2020-10-28 08:51:34,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf34cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:34, skipping insertion in model container [2020-10-28 08:51:34,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:34" (3/3) ... [2020-10-28 08:51:34,378 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2020-10-28 08:51:34,408 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:34,417 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:34,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:34,477 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:34,478 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:34,478 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:34,478 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:34,478 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:34,478 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:34,478 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:34,479 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-28 08:51:34,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:51:34,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:34,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:34,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1399133640, now seen corresponding path program 1 times [2020-10-28 08:51:34,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:34,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98721785] [2020-10-28 08:51:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:34,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:34,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:34,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:34,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:51:34,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:34,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-28 08:51:34,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:34,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:34,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:34,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:51:34,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:34,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:51:35,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:35,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:51:35,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:35,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:35,106 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 08:51:35,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98721785] [2020-10-28 08:51:35,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:35,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:35,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541052776] [2020-10-28 08:51:35,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:35,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:35,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:35,133 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-28 08:51:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:35,265 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2020-10-28 08:51:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:35,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-28 08:51:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:35,275 INFO L225 Difference]: With dead ends: 59 [2020-10-28 08:51:35,275 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 08:51:35,279 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 08:51:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 08:51:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 08:51:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:51:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 08:51:35,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-10-28 08:51:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:35,320 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 08:51:35,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 08:51:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:51:35,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:35,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:35,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:35,322 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash -983817162, now seen corresponding path program 1 times [2020-10-28 08:51:35,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:35,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533448024] [2020-10-28 08:51:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:51:35,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:35,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-28 08:51:35,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:35,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:51:35,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:35,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:51:35,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:35,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 08:51:35,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:35,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:35,884 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 08:51:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533448024] [2020-10-28 08:51:35,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:35,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:35,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486131793] [2020-10-28 08:51:35,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:35,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:35,894 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-10-28 08:51:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:36,062 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-28 08:51:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:36,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 08:51:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:36,064 INFO L225 Difference]: With dead ends: 47 [2020-10-28 08:51:36,064 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 08:51:36,065 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 08:51:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 08:51:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-28 08:51:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:51:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 08:51:36,074 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-28 08:51:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:36,074 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 08:51:36,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 08:51:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:51:36,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:36,076 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, 1] [2020-10-28 08:51:36,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:36,076 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1943183026, now seen corresponding path program 1 times [2020-10-28 08:51:36,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:36,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585334292] [2020-10-28 08:51:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:36,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:37,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:51:37,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:37,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 981 [2020-10-28 08:51:37,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:37,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:37,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:37,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:37,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:37,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:37,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:37,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:37,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:37,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:37,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:51:37,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:37,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:37,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:37,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:37,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 08:51:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 08:51:37,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585334292] [2020-10-28 08:51:37,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:37,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:37,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249513043] [2020-10-28 08:51:37,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:37,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:37,176 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-28 08:51:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:37,392 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-28 08:51:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:37,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 08:51:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:37,395 INFO L225 Difference]: With dead ends: 52 [2020-10-28 08:51:37,395 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:51:37,396 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 08:51:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:51:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-28 08:51:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 08:51:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 08:51:37,413 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-28 08:51:37,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:37,414 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 08:51:37,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 08:51:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 08:51:37,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:37,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:37,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:37,417 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:37,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1759275822, now seen corresponding path program 2 times [2020-10-28 08:51:37,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:37,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488390437] [2020-10-28 08:51:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:37,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:38,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 08:51:38,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:38,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-28 08:51:38,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:38,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:38,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:38,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:38,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:51:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:38,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:38,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:38,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:38,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:38,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:38,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:38,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:38,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 08:51:38,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488390437] [2020-10-28 08:51:38,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:38,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:38,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449784479] [2020-10-28 08:51:38,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:38,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:38,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:38,869 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2020-10-28 08:51:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:38,987 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-28 08:51:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:38,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 08:51:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:38,989 INFO L225 Difference]: With dead ends: 60 [2020-10-28 08:51:38,989 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:51:38,991 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 08:51:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:51:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 08:51:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:51:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-28 08:51:39,005 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-10-28 08:51:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:39,006 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-28 08:51:39,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-28 08:51:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:51:39,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:39,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:39,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:39,007 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash 777360012, now seen corresponding path program 1 times [2020-10-28 08:51:39,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:39,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434521806] [2020-10-28 08:51:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:51:41,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:41,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2470 [2020-10-28 08:51:41,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:51:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:41,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:41,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:41,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:41,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:41,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:41,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 08:51:41,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434521806] [2020-10-28 08:51:41,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:41,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:41,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036888428] [2020-10-28 08:51:41,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:41,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:41,616 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 6 states. [2020-10-28 08:51:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:41,799 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-28 08:51:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:41,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 08:51:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:41,801 INFO L225 Difference]: With dead ends: 59 [2020-10-28 08:51:41,801 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 08:51:41,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 08:51:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-28 08:51:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:51:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-28 08:51:41,817 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2020-10-28 08:51:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:41,820 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-28 08:51:41,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-28 08:51:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:51:41,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:41,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:41,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:41,822 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:41,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2101423608, now seen corresponding path program 2 times [2020-10-28 08:51:41,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:41,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730523729] [2020-10-28 08:51:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:51:45,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:45,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4000 [2020-10-28 08:51:45,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:45,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:51:45,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:45,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:45,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:45,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:45,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:45,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:45,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:45,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 08:51:45,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730523729] [2020-10-28 08:51:45,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:45,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285744608] [2020-10-28 08:51:45,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:45,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:45,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:45,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:45,958 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 5 states. [2020-10-28 08:51:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:46,124 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-28 08:51:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:46,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-28 08:51:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:46,126 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:51:46,127 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 08:51:46,127 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 08:51:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 08:51:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 08:51:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:51:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-28 08:51:46,142 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-10-28 08:51:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:46,142 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-28 08:51:46,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-28 08:51:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:51:46,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:46,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:46,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:46,148 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash 151550694, now seen corresponding path program 3 times [2020-10-28 08:51:46,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:46,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739419463] [2020-10-28 08:51:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:51:51,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:51,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:51:51,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:51,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:51,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:51,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:51,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:51,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:51,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:51,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:51,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 08:51:51,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739419463] [2020-10-28 08:51:51,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:51,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886215248] [2020-10-28 08:51:51,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:51,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:51,285 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 7 states. [2020-10-28 08:51:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:51,473 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-28 08:51:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:51,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 08:51:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:51,475 INFO L225 Difference]: With dead ends: 67 [2020-10-28 08:51:51,475 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:51:51,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:51:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-28 08:51:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 08:51:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-28 08:51:51,482 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-10-28 08:51:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:51,482 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-28 08:51:51,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-28 08:51:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:51:51,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:51,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:51,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:51,484 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1035539102, now seen corresponding path program 4 times [2020-10-28 08:51:51,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:51,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586759188] [2020-10-28 08:51:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:56,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:51:56,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:51:56,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:51:56,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:56,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:56,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:51:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:56,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:56,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:56,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:56,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:56,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:56,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:56,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:56,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:56,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 08:51:56,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586759188] [2020-10-28 08:51:56,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:56,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:56,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497557485] [2020-10-28 08:51:56,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:56,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:56,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:56,654 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 8 states. [2020-10-28 08:51:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:56,851 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-28 08:51:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:56,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-28 08:51:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:56,853 INFO L225 Difference]: With dead ends: 73 [2020-10-28 08:51:56,853 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 08:51:56,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:56,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 08:51:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-28 08:51:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:51:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-28 08:51:56,867 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2020-10-28 08:51:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:56,867 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-28 08:51:56,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-28 08:51:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:51:56,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:56,868 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:56,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:56,869 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1410813474, now seen corresponding path program 5 times [2020-10-28 08:51:56,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:56,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081409560] [2020-10-28 08:51:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:01,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:01,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:52:01,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:01,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:52:01,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:01,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:01,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:52:01,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:01,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:52:01,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:01,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:01,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:01,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:01,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:01,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:01,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:01,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:01,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:01,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:01,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:01,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:01,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 08:52:01,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081409560] [2020-10-28 08:52:01,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:01,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:52:01,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708264406] [2020-10-28 08:52:01,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:52:01,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:01,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:52:01,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:52:01,982 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-10-28 08:52:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:02,074 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-28 08:52:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:52:02,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-28 08:52:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:02,076 INFO L225 Difference]: With dead ends: 88 [2020-10-28 08:52:02,076 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:52:02,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:52:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:52:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 08:52:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 08:52:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-28 08:52:02,086 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2020-10-28 08:52:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:02,087 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-28 08:52:02,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:52:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-28 08:52:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:52:02,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:02,090 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:02,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:52:02,090 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash -560767684, now seen corresponding path program 6 times [2020-10-28 08:52:02,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:02,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272209842] [2020-10-28 08:52:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:02,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:07,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:52:07,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:52:07,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:07,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:07,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:52:07,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:52:07,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:52:07,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:07,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:07,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:07,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:07,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:07,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:07,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:07,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:07,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 08:52:07,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272209842] [2020-10-28 08:52:07,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:07,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:52:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051554876] [2020-10-28 08:52:07,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:52:07,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:52:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:07,325 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 9 states. [2020-10-28 08:52:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:07,471 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-10-28 08:52:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:52:07,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-28 08:52:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:07,473 INFO L225 Difference]: With dead ends: 81 [2020-10-28 08:52:07,473 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:52:07,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:52:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-28 08:52:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:52:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-28 08:52:07,482 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 45 [2020-10-28 08:52:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:07,482 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-28 08:52:07,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:52:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-28 08:52:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:52:07,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:07,483 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:07,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:52:07,484 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:07,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2046989496, now seen corresponding path program 7 times [2020-10-28 08:52:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:07,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027237104] [2020-10-28 08:52:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:07,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:12,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:52:12,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:52:12,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:52:12,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:12,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:52:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:52:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:52:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:12,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:12,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:12,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:12,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:12,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:12,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:12,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:12,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:12,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 08:52:12,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027237104] [2020-10-28 08:52:12,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:12,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:52:12,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420966244] [2020-10-28 08:52:12,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:52:12,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:12,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:52:12,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:12,644 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 10 states. [2020-10-28 08:52:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:12,785 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-28 08:52:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:52:12,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-28 08:52:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:12,787 INFO L225 Difference]: With dead ends: 87 [2020-10-28 08:52:12,787 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 08:52:12,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 08:52:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-28 08:52:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 08:52:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-28 08:52:12,798 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-10-28 08:52:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:12,799 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-28 08:52:12,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:52:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-28 08:52:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:52:12,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:12,803 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:12,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:52:12,803 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash -269312460, now seen corresponding path program 8 times [2020-10-28 08:52:12,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:12,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642053129] [2020-10-28 08:52:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:12,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:17,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:52:17,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:52:17,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:17,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:52:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:52:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:17,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:17,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:17,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:17,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:17,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:17,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:17,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:17,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:17,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:17,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-28 08:52:17,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642053129] [2020-10-28 08:52:17,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:17,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:52:17,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218025875] [2020-10-28 08:52:17,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:52:17,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:17,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:52:17,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:52:17,911 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 7 states. [2020-10-28 08:52:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:18,002 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-28 08:52:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:52:18,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-28 08:52:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:18,003 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:52:18,004 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:52:18,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:52:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:52:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-28 08:52:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:52:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-28 08:52:18,011 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2020-10-28 08:52:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:18,011 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-28 08:52:18,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:52:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-28 08:52:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:52:18,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:18,012 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:18,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:52:18,013 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -981652462, now seen corresponding path program 9 times [2020-10-28 08:52:18,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:18,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052377127] [2020-10-28 08:52:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:18,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:23,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:23,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:52:23,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:23,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:52:23,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:23,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:23,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:23,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:52:23,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:52:23,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:23,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:23,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:23,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:23,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:23,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:23,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:23,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:23,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:23,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-28 08:52:23,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052377127] [2020-10-28 08:52:23,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:23,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:23,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544173813] [2020-10-28 08:52:23,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:23,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:23,170 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 11 states. [2020-10-28 08:52:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:23,336 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-10-28 08:52:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:23,337 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-28 08:52:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:23,338 INFO L225 Difference]: With dead ends: 95 [2020-10-28 08:52:23,338 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:52:23,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:52:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-28 08:52:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:52:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-28 08:52:23,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2020-10-28 08:52:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:23,346 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-28 08:52:23,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-28 08:52:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:52:23,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:23,347 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:23,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:52:23,348 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:23,348 INFO L82 PathProgramCache]: Analyzing trace with hash -622663538, now seen corresponding path program 10 times [2020-10-28 08:52:23,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:23,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317051312] [2020-10-28 08:52:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:23,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:23,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:23,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:28,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:28,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:52:28,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:28,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:52:28,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:28,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:52:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:52:28,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:28,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:28,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:28,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-28 08:52:28,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317051312] [2020-10-28 08:52:28,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:28,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:52:28,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747919909] [2020-10-28 08:52:28,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:52:28,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:28,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:52:28,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:52:28,439 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 8 states. [2020-10-28 08:52:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:28,549 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-28 08:52:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:52:28,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-28 08:52:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:28,551 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:52:28,551 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:52:28,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:52:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:52:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-28 08:52:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:52:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-28 08:52:28,561 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2020-10-28 08:52:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:28,561 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-28 08:52:28,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:52:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-28 08:52:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:52:28,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:28,562 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:28,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:52:28,562 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1892214804, now seen corresponding path program 11 times [2020-10-28 08:52:28,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:28,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933949855] [2020-10-28 08:52:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:28,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:28,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:33,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:33,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:52:33,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:33,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:52:33,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:33,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:33,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:33,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:52:33,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:52:33,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:33,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:33,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:33,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:33,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:33,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:33,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:33,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:33,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-28 08:52:33,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933949855] [2020-10-28 08:52:33,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:33,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:52:33,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113413395] [2020-10-28 08:52:33,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:52:33,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:52:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:33,735 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 12 states. [2020-10-28 08:52:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:33,938 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-10-28 08:52:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:52:33,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-28 08:52:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:33,940 INFO L225 Difference]: With dead ends: 103 [2020-10-28 08:52:33,941 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 08:52:33,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 08:52:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-28 08:52:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 08:52:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-28 08:52:33,951 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 61 [2020-10-28 08:52:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:33,952 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-28 08:52:33,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:52:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-28 08:52:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:52:33,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:33,953 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:33,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:52:33,953 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:33,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1574455144, now seen corresponding path program 12 times [2020-10-28 08:52:33,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:33,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373427659] [2020-10-28 08:52:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:33,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:34,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:34,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:52:38,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:52:38,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:39,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:39,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:39,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:39,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:39,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:52:39,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:39,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:39,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:52:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-10-28 08:52:39,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373427659] [2020-10-28 08:52:39,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:39,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:39,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430867041] [2020-10-28 08:52:39,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:39,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:39,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:39,176 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 13 states. [2020-10-28 08:52:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:39,463 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-10-28 08:52:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:52:39,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-28 08:52:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:39,466 INFO L225 Difference]: With dead ends: 109 [2020-10-28 08:52:39,467 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 08:52:39,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 08:52:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-28 08:52:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 08:52:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-28 08:52:39,487 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 65 [2020-10-28 08:52:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:39,488 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-28 08:52:39,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-28 08:52:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:52:39,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:39,494 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:39,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:52:39,494 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash -322287388, now seen corresponding path program 13 times [2020-10-28 08:52:39,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:39,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706510513] [2020-10-28 08:52:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:39,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:39,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:44,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:52:44,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:44,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:44,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:44,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:44,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:44,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:44,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:44,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:44,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-28 08:52:44,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706510513] [2020-10-28 08:52:44,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:44,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:52:44,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300292991] [2020-10-28 08:52:44,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:52:44,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:44,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:52:44,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:44,636 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 9 states. [2020-10-28 08:52:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:44,756 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-10-28 08:52:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:52:44,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-28 08:52:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:44,757 INFO L225 Difference]: With dead ends: 134 [2020-10-28 08:52:44,757 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:52:44,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:52:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:52:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 08:52:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:52:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-28 08:52:44,765 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2020-10-28 08:52:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:44,765 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-28 08:52:44,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:52:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-28 08:52:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:52:44,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:44,766 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:44,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:52:44,767 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:44,767 INFO L82 PathProgramCache]: Analyzing trace with hash -253142334, now seen corresponding path program 14 times [2020-10-28 08:52:44,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:44,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49362448] [2020-10-28 08:52:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:45,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:49,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:52:49,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:49,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:52:49,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:49,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:49,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:49,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:52:49,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:52:49,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:49,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:49,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:49,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:49,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:49,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:49,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:49,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:49,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-28 08:52:49,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49362448] [2020-10-28 08:52:49,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:49,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:49,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212934772] [2020-10-28 08:52:49,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:49,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:49,972 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 14 states. [2020-10-28 08:52:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:50,137 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2020-10-28 08:52:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:52:50,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-10-28 08:52:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:50,139 INFO L225 Difference]: With dead ends: 117 [2020-10-28 08:52:50,139 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:52:50,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:52:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-28 08:52:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 08:52:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-28 08:52:50,146 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 71 [2020-10-28 08:52:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:50,146 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-28 08:52:50,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-28 08:52:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:52:50,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:50,147 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:50,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:52:50,147 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1002500290, now seen corresponding path program 15 times [2020-10-28 08:52:50,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:50,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422445763] [2020-10-28 08:52:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:50,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:55,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:52:55,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:52:55,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-28 08:52:55,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:55,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:55,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:52:55,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:55,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:52:55,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:55,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:55,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:55,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:55,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:55,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:55,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:55,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:55,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-28 08:52:55,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422445763] [2020-10-28 08:52:55,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:55,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:52:55,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360156144] [2020-10-28 08:52:55,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:52:55,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:52:55,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:55,416 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 10 states. [2020-10-28 08:52:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:55,550 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-28 08:52:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:52:55,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-28 08:52:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:55,552 INFO L225 Difference]: With dead ends: 144 [2020-10-28 08:52:55,552 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 08:52:55,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 08:52:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 08:52:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:52:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-28 08:52:55,562 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 75 [2020-10-28 08:52:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:55,562 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-28 08:52:55,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:52:55,562 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-28 08:52:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:52:55,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:55,565 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:55,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:52:55,566 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:55,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:55,566 INFO L82 PathProgramCache]: Analyzing trace with hash 515162780, now seen corresponding path program 16 times [2020-10-28 08:52:55,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:55,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853434843] [2020-10-28 08:52:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:55,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:00,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:53:00,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 08:53:00,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:00,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:53:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:53:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:53:00,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:00,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:00,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:00,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:00,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:00,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:00,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:00,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:00,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:00,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2020-10-28 08:53:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853434843] [2020-10-28 08:53:00,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:00,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:53:00,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412853089] [2020-10-28 08:53:00,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:53:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:53:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:00,809 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 15 states. [2020-10-28 08:53:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:01,050 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2020-10-28 08:53:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:53:01,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2020-10-28 08:53:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:01,052 INFO L225 Difference]: With dead ends: 125 [2020-10-28 08:53:01,052 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 08:53:01,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 08:53:01,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-28 08:53:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:53:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-28 08:53:01,060 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2020-10-28 08:53:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:01,060 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-28 08:53:01,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:53:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-28 08:53:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:53:01,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:01,061 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:01,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:53:01,062 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1481381352, now seen corresponding path program 17 times [2020-10-28 08:53:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:01,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072343854] [2020-10-28 08:53:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:01,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:06,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:53:06,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:06,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 08:53:06,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:06,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:53:06,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 08:53:06,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:53:06,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:06,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:06,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:06,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:06,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-10-28 08:53:06,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072343854] [2020-10-28 08:53:06,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:06,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:53:06,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918456928] [2020-10-28 08:53:06,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:53:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:06,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:53:06,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:06,316 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 16 states. [2020-10-28 08:53:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:06,515 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-28 08:53:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:53:06,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-28 08:53:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:06,517 INFO L225 Difference]: With dead ends: 131 [2020-10-28 08:53:06,517 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 08:53:06,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 08:53:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-28 08:53:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 08:53:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-28 08:53:06,523 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 81 [2020-10-28 08:53:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:06,523 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-28 08:53:06,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:53:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-28 08:53:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:53:06,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:06,524 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:06,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:53:06,524 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:06,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2016156780, now seen corresponding path program 18 times [2020-10-28 08:53:06,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:06,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868444358] [2020-10-28 08:53:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:06,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:11,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:53:11,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:11,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:11,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:11,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:11,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-28 08:53:11,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868444358] [2020-10-28 08:53:11,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:11,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:53:11,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535425689] [2020-10-28 08:53:11,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:53:11,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:11,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:53:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:53:11,702 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 11 states. [2020-10-28 08:53:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:11,846 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2020-10-28 08:53:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:53:11,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-10-28 08:53:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:11,850 INFO L225 Difference]: With dead ends: 162 [2020-10-28 08:53:11,850 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 08:53:11,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:53:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 08:53:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-28 08:53:11,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 08:53:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-28 08:53:11,858 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2020-10-28 08:53:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:11,859 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-28 08:53:11,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:53:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-28 08:53:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 08:53:11,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:11,860 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:11,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:53:11,860 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1459652238, now seen corresponding path program 19 times [2020-10-28 08:53:11,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:11,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563653461] [2020-10-28 08:53:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:12,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:16,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 08:53:16,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:16,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 08:53:16,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:16,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:53:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 08:53:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:53:16,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:17,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:17,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:17,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:17,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:17,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:17,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:17,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:17,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:17,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:17,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2020-10-28 08:53:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563653461] [2020-10-28 08:53:17,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:17,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:53:17,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410815063] [2020-10-28 08:53:17,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:53:17,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:53:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:53:17,130 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 17 states. [2020-10-28 08:53:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:17,375 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2020-10-28 08:53:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:53:17,376 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 87 [2020-10-28 08:53:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:17,377 INFO L225 Difference]: With dead ends: 139 [2020-10-28 08:53:17,377 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 08:53:17,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:53:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 08:53:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-28 08:53:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:53:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-10-28 08:53:17,383 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 87 [2020-10-28 08:53:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:17,384 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-10-28 08:53:17,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:53:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-10-28 08:53:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:53:17,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:17,385 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:17,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:53:17,385 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:17,386 INFO L82 PathProgramCache]: Analyzing trace with hash -412015122, now seen corresponding path program 20 times [2020-10-28 08:53:17,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:17,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080244897] [2020-10-28 08:53:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:17,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:53:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:53:22,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:22,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:22,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:22,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:22,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:22,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:22,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:22,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-28 08:53:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080244897] [2020-10-28 08:53:22,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:22,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:53:22,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876755] [2020-10-28 08:53:22,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:53:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:53:22,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:22,636 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 18 states. [2020-10-28 08:53:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:22,896 INFO L93 Difference]: Finished difference Result 145 states and 151 transitions. [2020-10-28 08:53:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:53:22,896 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-10-28 08:53:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:22,897 INFO L225 Difference]: With dead ends: 145 [2020-10-28 08:53:22,897 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 08:53:22,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 08:53:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-28 08:53:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 08:53:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-28 08:53:22,903 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 91 [2020-10-28 08:53:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:22,904 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-28 08:53:22,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:53:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-28 08:53:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 08:53:22,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:22,905 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:22,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:53:22,905 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash 541140074, now seen corresponding path program 21 times [2020-10-28 08:53:22,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:22,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458365839] [2020-10-28 08:53:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:22,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:23,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:27,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:27,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 08:53:27,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:27,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:53:27,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:27,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:53:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:53:27,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:28,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:28,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:28,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:28,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:28,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:28,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:28,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:28,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:28,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:28,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:28,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:28,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-28 08:53:28,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458365839] [2020-10-28 08:53:28,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:28,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:53:28,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919782911] [2020-10-28 08:53:28,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:53:28,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:28,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:53:28,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:28,069 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 12 states. [2020-10-28 08:53:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:28,203 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2020-10-28 08:53:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:53:28,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-10-28 08:53:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:28,204 INFO L225 Difference]: With dead ends: 180 [2020-10-28 08:53:28,204 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 08:53:28,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 08:53:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 08:53:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 08:53:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-28 08:53:28,210 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 95 [2020-10-28 08:53:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:28,211 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-28 08:53:28,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:53:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-28 08:53:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 08:53:28,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:28,212 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:28,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:53:28,212 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1107918024, now seen corresponding path program 22 times [2020-10-28 08:53:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:28,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881926235] [2020-10-28 08:53:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:28,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:28,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:28,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:33,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 08:53:33,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:33,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:53:33,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:33,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:53:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 08:53:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:53:33,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:33,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:33,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:33,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:33,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:33,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:33,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:33,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:33,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:33,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:33,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-28 08:53:33,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881926235] [2020-10-28 08:53:33,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:33,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:53:33,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584423552] [2020-10-28 08:53:33,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:53:33,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:53:33,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:53:33,530 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 19 states. [2020-10-28 08:53:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:33,842 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-10-28 08:53:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:53:33,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-10-28 08:53:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:33,845 INFO L225 Difference]: With dead ends: 153 [2020-10-28 08:53:33,845 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 08:53:33,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:53:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 08:53:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-28 08:53:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:53:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-28 08:53:33,851 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 97 [2020-10-28 08:53:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:33,852 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-28 08:53:33,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:53:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-28 08:53:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:53:33,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:33,853 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:33,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:53:33,853 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:33,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1183018564, now seen corresponding path program 23 times [2020-10-28 08:53:33,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:33,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676558547] [2020-10-28 08:53:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:33,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:38,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:53:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:39,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:39,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:39,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:39,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:39,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:39,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:39,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:39,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:39,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:39,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-28 08:53:39,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676558547] [2020-10-28 08:53:39,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:39,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:53:39,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018560514] [2020-10-28 08:53:39,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:53:39,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:39,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:53:39,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:39,034 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 13 states. [2020-10-28 08:53:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:39,174 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2020-10-28 08:53:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:53:39,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-28 08:53:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:39,175 INFO L225 Difference]: With dead ends: 190 [2020-10-28 08:53:39,175 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 08:53:39,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 08:53:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 08:53:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:53:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-28 08:53:39,182 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2020-10-28 08:53:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:39,182 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-28 08:53:39,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:53:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-28 08:53:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:53:39,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:39,183 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:39,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:53:39,183 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:39,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2093774814, now seen corresponding path program 24 times [2020-10-28 08:53:39,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:39,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838436712] [2020-10-28 08:53:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:39,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:53:44,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:44,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:53:44,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:44,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:44,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:44,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:44,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:44,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:44,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:44,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:44,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:44,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:44,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-10-28 08:53:44,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838436712] [2020-10-28 08:53:44,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:44,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:53:44,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061179544] [2020-10-28 08:53:44,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:53:44,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:44,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:53:44,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:53:44,546 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 20 states. [2020-10-28 08:53:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:44,849 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2020-10-28 08:53:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:53:44,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-28 08:53:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:44,850 INFO L225 Difference]: With dead ends: 161 [2020-10-28 08:53:44,851 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 08:53:44,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:53:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 08:53:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-28 08:53:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 08:53:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-28 08:53:44,857 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2020-10-28 08:53:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:44,857 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-28 08:53:44,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:53:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-28 08:53:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 08:53:44,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:44,859 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:44,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:53:44,859 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1259524962, now seen corresponding path program 25 times [2020-10-28 08:53:44,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:44,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766497598] [2020-10-28 08:53:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:44,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:53:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:50,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:50,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:50,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-10-28 08:53:50,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766497598] [2020-10-28 08:53:50,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:50,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:53:50,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535128306] [2020-10-28 08:53:50,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:53:50,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:53:50,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:50,213 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 21 states. [2020-10-28 08:53:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:50,487 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2020-10-28 08:53:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:53:50,488 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 107 [2020-10-28 08:53:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:50,489 INFO L225 Difference]: With dead ends: 167 [2020-10-28 08:53:50,490 INFO L226 Difference]: Without dead ends: 118 [2020-10-28 08:53:50,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-28 08:53:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-10-28 08:53:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 08:53:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2020-10-28 08:53:50,497 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 107 [2020-10-28 08:53:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:50,498 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2020-10-28 08:53:50,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:53:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2020-10-28 08:53:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 08:53:50,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:50,499 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:50,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:53:50,500 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:50,500 INFO L82 PathProgramCache]: Analyzing trace with hash 869606170, now seen corresponding path program 26 times [2020-10-28 08:53:50,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:50,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923280727] [2020-10-28 08:53:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:50,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:51,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 08:53:55,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:53:55,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-28 08:53:55,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:53:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:53:55,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:55,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:55,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:55,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:55,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:55,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:55,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:55,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-28 08:53:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923280727] [2020-10-28 08:53:55,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:55,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:53:55,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047693649] [2020-10-28 08:53:55,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:53:55,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:53:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:55,762 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 14 states. [2020-10-28 08:53:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:55,866 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2020-10-28 08:53:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:53:55,866 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 111 [2020-10-28 08:53:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:55,868 INFO L225 Difference]: With dead ends: 208 [2020-10-28 08:53:55,868 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 08:53:55,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 08:53:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-28 08:53:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 08:53:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-28 08:53:55,874 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 111 [2020-10-28 08:53:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:55,875 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-28 08:53:55,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:53:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-28 08:53:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:53:55,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:55,876 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:55,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:53:55,876 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash -934477960, now seen corresponding path program 27 times [2020-10-28 08:53:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:55,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849045196] [2020-10-28 08:53:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:55,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:00,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 08:54:00,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:00,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-28 08:54:00,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:00,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:00,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:54:00,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:54:00,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:54:00,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:01,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:01,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:01,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:01,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:01,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:01,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:01,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:01,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:01,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:01,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2020-10-28 08:54:01,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849045196] [2020-10-28 08:54:01,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:01,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:54:01,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31345354] [2020-10-28 08:54:01,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:54:01,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:54:01,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:54:01,306 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 22 states. [2020-10-28 08:54:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:01,536 INFO L93 Difference]: Finished difference Result 175 states and 181 transitions. [2020-10-28 08:54:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:54:01,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-10-28 08:54:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:01,538 INFO L225 Difference]: With dead ends: 175 [2020-10-28 08:54:01,538 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 08:54:01,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:54:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 08:54:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-28 08:54:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:54:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-28 08:54:01,545 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 113 [2020-10-28 08:54:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:01,545 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-28 08:54:01,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:54:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-28 08:54:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 08:54:01,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:01,547 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:01,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:54:01,547 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:01,548 INFO L82 PathProgramCache]: Analyzing trace with hash 525134068, now seen corresponding path program 28 times [2020-10-28 08:54:01,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:01,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721209107] [2020-10-28 08:54:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:06,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:54:06,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:06,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-28 08:54:06,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:06,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:06,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:54:06,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:06,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:54:06,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:06,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:06,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:06,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:06,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:06,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:06,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:06,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:06,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-28 08:54:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721209107] [2020-10-28 08:54:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:54:06,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994505771] [2020-10-28 08:54:06,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:54:06,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:06,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:54:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:54:06,839 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 15 states. [2020-10-28 08:54:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:07,013 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2020-10-28 08:54:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:54:07,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-10-28 08:54:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:07,016 INFO L225 Difference]: With dead ends: 218 [2020-10-28 08:54:07,016 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 08:54:07,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:54:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 08:54:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-28 08:54:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 08:54:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-28 08:54:07,022 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2020-10-28 08:54:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:07,023 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-28 08:54:07,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:54:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-28 08:54:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 08:54:07,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:07,024 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:07,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:54:07,025 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2047244590, now seen corresponding path program 29 times [2020-10-28 08:54:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:07,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829622313] [2020-10-28 08:54:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:07,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:08,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:12,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 08:54:12,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:54:12,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-28 08:54:12,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:12,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:12,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:54:12,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 08:54:12,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:54:12,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:12,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:12,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:12,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:12,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:12,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:12,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:12,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:12,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:12,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-10-28 08:54:12,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829622313] [2020-10-28 08:54:12,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:12,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:54:12,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467839975] [2020-10-28 08:54:12,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:54:12,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:12,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:54:12,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:54:12,525 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 23 states. [2020-10-28 08:54:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:12,804 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2020-10-28 08:54:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:54:12,805 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-10-28 08:54:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:12,807 INFO L225 Difference]: With dead ends: 183 [2020-10-28 08:54:12,807 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 08:54:12,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:54:12,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 08:54:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-28 08:54:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 08:54:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-28 08:54:12,814 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 119 [2020-10-28 08:54:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:12,814 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-28 08:54:12,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:54:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-28 08:54:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 08:54:12,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:12,816 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:12,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:54:12,816 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash -836295858, now seen corresponding path program 30 times [2020-10-28 08:54:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:12,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647498775] [2020-10-28 08:54:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:12,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:17,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:17,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:54:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:18,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:18,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:18,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:18,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:18,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:18,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:18,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:18,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:18,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-10-28 08:54:18,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647498775] [2020-10-28 08:54:18,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:18,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:54:18,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804128191] [2020-10-28 08:54:18,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:54:18,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:54:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:54:18,295 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand 24 states. [2020-10-28 08:54:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:18,652 INFO L93 Difference]: Finished difference Result 189 states and 195 transitions. [2020-10-28 08:54:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:54:18,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2020-10-28 08:54:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:18,654 INFO L225 Difference]: With dead ends: 189 [2020-10-28 08:54:18,654 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:54:18,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:54:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:54:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-10-28 08:54:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 08:54:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-28 08:54:18,661 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 123 [2020-10-28 08:54:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:18,662 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-28 08:54:18,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:54:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-28 08:54:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 08:54:18,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:18,663 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:18,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:54:18,663 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:18,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1733497290, now seen corresponding path program 31 times [2020-10-28 08:54:18,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:18,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093511468] [2020-10-28 08:54:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:18,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:18,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:54:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:23,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:54:23,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:23,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:23,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:23,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:23,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:23,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:23,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:23,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:23,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:23,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:23,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:23,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:23,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-28 08:54:24,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093511468] [2020-10-28 08:54:24,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:24,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:54:24,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607897986] [2020-10-28 08:54:24,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:54:24,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:24,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:54:24,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:24,004 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 16 states. [2020-10-28 08:54:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:24,142 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2020-10-28 08:54:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:54:24,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 127 [2020-10-28 08:54:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:24,144 INFO L225 Difference]: With dead ends: 236 [2020-10-28 08:54:24,144 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 08:54:24,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 08:54:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-28 08:54:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 08:54:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2020-10-28 08:54:24,150 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 127 [2020-10-28 08:54:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:24,151 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2020-10-28 08:54:24,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:54:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2020-10-28 08:54:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 08:54:24,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:24,152 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:24,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:54:24,152 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:24,153 INFO L82 PathProgramCache]: Analyzing trace with hash -957189592, now seen corresponding path program 32 times [2020-10-28 08:54:24,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:24,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475882468] [2020-10-28 08:54:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:24,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:54:29,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:29,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:29,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:29,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:29,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:29,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:29,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:29,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:29,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:29,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:29,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:29,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-28 08:54:29,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475882468] [2020-10-28 08:54:29,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:29,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:54:29,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986471866] [2020-10-28 08:54:29,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:54:29,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:29,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:54:29,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:54:29,678 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand 25 states. [2020-10-28 08:54:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:29,978 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2020-10-28 08:54:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:54:29,978 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 129 [2020-10-28 08:54:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:29,980 INFO L225 Difference]: With dead ends: 197 [2020-10-28 08:54:29,980 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 08:54:29,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:54:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 08:54:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-28 08:54:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 08:54:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2020-10-28 08:54:29,987 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 129 [2020-10-28 08:54:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:29,988 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2020-10-28 08:54:29,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:54:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2020-10-28 08:54:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 08:54:29,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:29,989 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:29,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:54:29,989 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1180413020, now seen corresponding path program 33 times [2020-10-28 08:54:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:29,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928994036] [2020-10-28 08:54:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:30,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:30,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:35,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 08:54:35,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:35,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:54:35,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:35,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:54:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:54:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:54:35,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:35,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:35,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:35,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:35,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2020-10-28 08:54:35,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928994036] [2020-10-28 08:54:35,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:35,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:54:35,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183400187] [2020-10-28 08:54:35,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:54:35,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:35,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:54:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:35,502 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand 26 states. [2020-10-28 08:54:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:35,900 INFO L93 Difference]: Finished difference Result 203 states and 209 transitions. [2020-10-28 08:54:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:54:35,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2020-10-28 08:54:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:35,902 INFO L225 Difference]: With dead ends: 203 [2020-10-28 08:54:35,902 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 08:54:35,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 08:54:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-28 08:54:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 08:54:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-28 08:54:35,908 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 133 [2020-10-28 08:54:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:35,909 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-28 08:54:35,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:54:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-28 08:54:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 08:54:35,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:35,910 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:35,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:54:35,910 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash 833750816, now seen corresponding path program 34 times [2020-10-28 08:54:35,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:35,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088480374] [2020-10-28 08:54:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:35,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:40,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:40,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 08:54:40,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:40,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:54:40,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:40,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:40,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:54:40,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:40,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:54:40,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:41,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:41,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:41,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:41,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:41,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-28 08:54:41,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088480374] [2020-10-28 08:54:41,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:41,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:54:41,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888868166] [2020-10-28 08:54:41,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:54:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:54:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:41,187 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 17 states. [2020-10-28 08:54:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:41,362 INFO L93 Difference]: Finished difference Result 254 states and 260 transitions. [2020-10-28 08:54:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:54:41,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 137 [2020-10-28 08:54:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:41,364 INFO L225 Difference]: With dead ends: 254 [2020-10-28 08:54:41,364 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 08:54:41,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:54:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 08:54:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-28 08:54:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 08:54:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2020-10-28 08:54:41,370 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 137 [2020-10-28 08:54:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:41,371 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2020-10-28 08:54:41,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:54:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2020-10-28 08:54:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 08:54:41,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:41,372 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:41,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:54:41,372 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:41,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1167264254, now seen corresponding path program 35 times [2020-10-28 08:54:41,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:41,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788645975] [2020-10-28 08:54:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:41,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:41,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:46,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5169 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:54:46,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:47,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:47,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:47,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:47,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:47,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:47,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2020-10-28 08:54:47,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788645975] [2020-10-28 08:54:47,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:47,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:54:47,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579952532] [2020-10-28 08:54:47,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:54:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:54:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:54:47,124 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand 27 states. [2020-10-28 08:54:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:47,510 INFO L93 Difference]: Finished difference Result 211 states and 217 transitions. [2020-10-28 08:54:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:54:47,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 139 [2020-10-28 08:54:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:47,512 INFO L225 Difference]: With dead ends: 211 [2020-10-28 08:54:47,512 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 08:54:47,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:54:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 08:54:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-28 08:54:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 08:54:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2020-10-28 08:54:47,518 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 139 [2020-10-28 08:54:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:47,518 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2020-10-28 08:54:47,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:54:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2020-10-28 08:54:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 08:54:47,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:47,520 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:47,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:54:47,520 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1747906682, now seen corresponding path program 36 times [2020-10-28 08:54:47,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:47,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813687341] [2020-10-28 08:54:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:47,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:52,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:52,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 08:54:52,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:54:52,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:52,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:54:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:54:52,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:52,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:52,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:52,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:52,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:52,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:52,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:52,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:52,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:52,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:52,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:52,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:52,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-28 08:54:52,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813687341] [2020-10-28 08:54:52,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:52,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:54:52,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721421565] [2020-10-28 08:54:52,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:54:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:52,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:54:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:54:52,888 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand 18 states. [2020-10-28 08:54:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:53,113 INFO L93 Difference]: Finished difference Result 264 states and 270 transitions. [2020-10-28 08:54:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:54:53,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 143 [2020-10-28 08:54:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:53,114 INFO L225 Difference]: With dead ends: 264 [2020-10-28 08:54:53,115 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 08:54:53,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:54:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 08:54:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-28 08:54:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 08:54:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2020-10-28 08:54:53,125 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 143 [2020-10-28 08:54:53,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:53,125 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2020-10-28 08:54:53,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:54:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2020-10-28 08:54:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 08:54:53,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:53,128 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:53,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:54:53,128 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash -76688168, now seen corresponding path program 37 times [2020-10-28 08:54:53,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:53,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570447367] [2020-10-28 08:54:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:53,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:53,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:58,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 08:54:58,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 08:54:58,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:58,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:54:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:54:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:54:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:58,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:58,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:58,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:58,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:58,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:58,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:58,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:58,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-28 08:54:58,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570447367] [2020-10-28 08:54:58,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:58,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:54:58,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909591604] [2020-10-28 08:54:58,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:54:58,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:54:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:54:58,850 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand 28 states. [2020-10-28 08:54:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:59,263 INFO L93 Difference]: Finished difference Result 219 states and 225 transitions. [2020-10-28 08:54:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:54:59,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 145 [2020-10-28 08:54:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:59,265 INFO L225 Difference]: With dead ends: 219 [2020-10-28 08:54:59,265 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 08:54:59,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:54:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 08:54:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-28 08:54:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 08:54:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2020-10-28 08:54:59,272 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 145 [2020-10-28 08:54:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:59,273 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2020-10-28 08:54:59,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:54:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2020-10-28 08:54:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:54:59,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:59,274 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:59,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:54:59,274 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:59,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1375883692, now seen corresponding path program 38 times [2020-10-28 08:54:59,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:59,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663447981] [2020-10-28 08:54:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:59,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:04,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:55:04,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:55:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:55:04,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:04,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:55:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:55:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 08:55:04,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:04,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:04,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:04,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:04,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:04,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:04,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:04,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1475 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-10-28 08:55:04,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663447981] [2020-10-28 08:55:04,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:04,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:55:04,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385854884] [2020-10-28 08:55:04,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:55:04,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:55:04,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:55:04,917 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand 29 states. [2020-10-28 08:55:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:05,332 INFO L93 Difference]: Finished difference Result 225 states and 231 transitions. [2020-10-28 08:55:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:55:05,333 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 149 [2020-10-28 08:55:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:05,337 INFO L225 Difference]: With dead ends: 225 [2020-10-28 08:55:05,337 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 08:55:05,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:55:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 08:55:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-28 08:55:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 08:55:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2020-10-28 08:55:05,344 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 149 [2020-10-28 08:55:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:05,344 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2020-10-28 08:55:05,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:55:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2020-10-28 08:55:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 08:55:05,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:05,346 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:05,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:55:05,346 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1706645968, now seen corresponding path program 39 times [2020-10-28 08:55:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:05,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938423960] [2020-10-28 08:55:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:10,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:10,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:55:10,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:10,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:10,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:10,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:10,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-28 08:55:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938423960] [2020-10-28 08:55:10,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:10,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:55:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638469325] [2020-10-28 08:55:10,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:55:10,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:55:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:55:10,784 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand 19 states. [2020-10-28 08:55:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:10,996 INFO L93 Difference]: Finished difference Result 282 states and 288 transitions. [2020-10-28 08:55:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:55:10,997 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 153 [2020-10-28 08:55:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:10,998 INFO L225 Difference]: With dead ends: 282 [2020-10-28 08:55:10,998 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 08:55:10,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:55:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 08:55:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-28 08:55:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-28 08:55:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2020-10-28 08:55:11,005 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 153 [2020-10-28 08:55:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:11,006 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2020-10-28 08:55:11,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:55:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2020-10-28 08:55:11,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-28 08:55:11,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:11,007 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:11,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 08:55:11,007 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -559619922, now seen corresponding path program 40 times [2020-10-28 08:55:11,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:11,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230416514] [2020-10-28 08:55:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:11,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:16,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:16,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 08:55:16,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:55:16,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5266 [2020-10-28 08:55:16,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:16,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:16,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:55:16,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 08:55:16,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:55:16,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:16,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:16,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:16,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:16,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:16,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:16,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:16,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:16,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:16,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:16,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:16,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:16,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2020-10-28 08:55:16,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230416514] [2020-10-28 08:55:16,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:16,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:55:16,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736149623] [2020-10-28 08:55:16,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:55:16,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:16,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:55:16,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:55:16,925 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand 30 states. [2020-10-28 08:55:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:17,371 INFO L93 Difference]: Finished difference Result 233 states and 239 transitions. [2020-10-28 08:55:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:55:17,372 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 155 [2020-10-28 08:55:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:17,373 INFO L225 Difference]: With dead ends: 233 [2020-10-28 08:55:17,373 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 08:55:17,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:55:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 08:55:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-10-28 08:55:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 08:55:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2020-10-28 08:55:17,383 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 155 [2020-10-28 08:55:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:17,383 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2020-10-28 08:55:17,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:55:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2020-10-28 08:55:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 08:55:17,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:17,384 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:17,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 08:55:17,385 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1423753002, now seen corresponding path program 41 times [2020-10-28 08:55:17,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:17,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792638077] [2020-10-28 08:55:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:17,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:22,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:22,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:55:22,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:22,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:22,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:22,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:22,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:22,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:22,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:22,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:22,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-28 08:55:22,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792638077] [2020-10-28 08:55:22,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:22,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:55:22,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110533969] [2020-10-28 08:55:22,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:55:22,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:22,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:55:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:55:22,765 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand 20 states. [2020-10-28 08:55:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:22,994 INFO L93 Difference]: Finished difference Result 292 states and 298 transitions. [2020-10-28 08:55:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:55:22,995 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-10-28 08:55:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:22,997 INFO L225 Difference]: With dead ends: 292 [2020-10-28 08:55:22,997 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 08:55:22,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:55:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 08:55:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-28 08:55:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 08:55:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2020-10-28 08:55:23,006 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 159 [2020-10-28 08:55:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:23,007 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2020-10-28 08:55:23,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:55:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2020-10-28 08:55:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 08:55:23,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:23,010 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:23,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 08:55:23,010 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1808586872, now seen corresponding path program 42 times [2020-10-28 08:55:23,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:23,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867629933] [2020-10-28 08:55:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:23,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 08:55:28,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:55:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-28 08:55:28,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:55:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:55:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:55:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:28,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:28,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:28,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:28,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:28,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:28,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:28,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2020-10-28 08:55:28,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867629933] [2020-10-28 08:55:28,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:28,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:55:28,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833381409] [2020-10-28 08:55:28,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:55:28,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:28,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:55:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:55:28,870 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand 31 states. [2020-10-28 08:55:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:29,344 INFO L93 Difference]: Finished difference Result 241 states and 247 transitions. [2020-10-28 08:55:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:55:29,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 161 [2020-10-28 08:55:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:29,346 INFO L225 Difference]: With dead ends: 241 [2020-10-28 08:55:29,346 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 08:55:29,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:55:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 08:55:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2020-10-28 08:55:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 08:55:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2020-10-28 08:55:29,353 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 161 [2020-10-28 08:55:29,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:29,353 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2020-10-28 08:55:29,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:55:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2020-10-28 08:55:29,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 08:55:29,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:29,354 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:29,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 08:55:29,355 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash -976422652, now seen corresponding path program 43 times [2020-10-28 08:55:29,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:29,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286685933] [2020-10-28 08:55:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY