/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=SHALLOWEST --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_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:21:29,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:21:29,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:21:30,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:21:30,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:21:30,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:21:30,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:21:30,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:21:30,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:21:30,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:21:30,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:21:30,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:21:30,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:21:30,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:21:30,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:21:30,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:21:30,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:21:30,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:21:30,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:21:30,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:21:30,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:21:30,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:21:30,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:21:30,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:21:30,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:21:30,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:21:30,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:21:30,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:21:30,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:21:30,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:21:30,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:21:30,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:21:30,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:21:30,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:21:30,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:21:30,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:21:30,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:21:30,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:21:30,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:21:30,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:21:30,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:21:30,101 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 [2020-10-26 19:21:30,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:21:30,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:21:30,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:21:30,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:21:30,151 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:21:30,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:21:30,152 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:21:30,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:21:30,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:21:30,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:21:30,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:21:30,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:21:30,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:21:30,154 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:21:30,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:21:30,154 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:21:30,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:21:30,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:21:30,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:21:30,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:21:30,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:21:30,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:21:30,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:21:30,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:21:30,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:21:30,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:21:30,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:21:30,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:21:30,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:21:30,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:21:30,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:21:30,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:21:30,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:21:30,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:21:30,643 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:21:30,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2020-10-26 19:21:30,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5327763bf/875c052fc94c41ccb2a711b989eced7b/FLAGd9f585d15 [2020-10-26 19:21:31,336 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:21:31,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2020-10-26 19:21:31,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5327763bf/875c052fc94c41ccb2a711b989eced7b/FLAGd9f585d15 [2020-10-26 19:21:31,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5327763bf/875c052fc94c41ccb2a711b989eced7b [2020-10-26 19:21:31,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:21:31,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:21:31,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:31,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:21:31,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:21:31,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efdc3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31, skipping insertion in model container [2020-10-26 19:21:31,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:21:31,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:21:31,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:31,913 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:21:31,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:31,953 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:21:31,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31 WrapperNode [2020-10-26 19:21:31,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:31,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:21:31,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:21:31,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:21:31,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (1/1) ... [2020-10-26 19:21:31,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:21:31,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:21:31,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:21:31,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:21:31,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (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 [2020-10-26 19:21:32,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:21:32,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:21:32,070 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:21:32,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:21:32,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:21:32,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:21:32,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:21:32,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:21:32,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:21:32,072 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:21:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:21:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:21:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:21:32,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:21:32,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:21:32,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:21:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:21:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:21:32,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:21:32,463 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:21:32,463 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:21:32,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:32 BoogieIcfgContainer [2020-10-26 19:21:32,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:21:32,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:21:32,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:21:32,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:21:32,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:21:31" (1/3) ... [2020-10-26 19:21:32,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edd2690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:32, skipping insertion in model container [2020-10-26 19:21:32,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:31" (2/3) ... [2020-10-26 19:21:32,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edd2690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:32, skipping insertion in model container [2020-10-26 19:21:32,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:32" (3/3) ... [2020-10-26 19:21:32,473 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2020-10-26 19:21:32,485 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:21:32,489 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:21:32,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:21:32,532 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:21:32,533 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:21:32,533 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:21:32,533 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:21:32,533 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:21:32,533 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:21:32,533 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:21:32,534 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:21:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:21:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:21:32,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:32,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:32,560 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1347201846, now seen corresponding path program 1 times [2020-10-26 19:21:32,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:32,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806532590] [2020-10-26 19:21:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:32,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:32,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:32,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:33,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:33,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:21:33,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:21:33,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-26 19:21:33,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:21:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:33,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:21:33,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:21:33,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:33,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:33,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:33,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:33,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:21:33,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:33,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:33,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806532590] [2020-10-26 19:21:33,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:21:33,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:21:33,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886434846] [2020-10-26 19:21:33,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:21:33,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:33,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:21:33,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:33,506 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-26 19:21:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:33,652 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2020-10-26 19:21:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:21:33,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-26 19:21:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:33,662 INFO L225 Difference]: With dead ends: 71 [2020-10-26 19:21:33,662 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:21:33,666 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 [2020-10-26 19:21:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:21:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-26 19:21:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:21:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-26 19:21:33,710 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-10-26 19:21:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:33,711 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-26 19:21:33,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:21:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-26 19:21:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:21:33,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:33,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:33,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:21:33,714 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:33,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1425424922, now seen corresponding path program 1 times [2020-10-26 19:21:33,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:33,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937587625] [2020-10-26 19:21:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:33,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:33,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:38,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:38,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:21:38,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:21:38,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:21:38,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:21:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:38,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:21:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:39,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:39,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:39,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:39,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:39,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:21:39,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:21:39,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937587625] [2020-10-26 19:21:39,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:39,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:21:39,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216837652] [2020-10-26 19:21:39,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:21:39,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:39,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:21:39,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:21:39,340 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2020-10-26 19:21:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:40,114 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-26 19:21:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:21:40,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-26 19:21:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:40,120 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:21:40,120 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:21:40,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:21:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:21:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-26 19:21:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:21:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-26 19:21:40,158 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2020-10-26 19:21:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:40,159 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-26 19:21:40,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:21:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-26 19:21:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:21:40,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:40,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:40,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:21:40,162 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:40,167 INFO L82 PathProgramCache]: Analyzing trace with hash 742729624, now seen corresponding path program 2 times [2020-10-26 19:21:40,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:40,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069706595] [2020-10-26 19:21:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:40,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:41,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:43,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:45,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:21:45,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:21:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:21:45,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:21:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:21:45,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:45,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:45,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:45,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:45,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:45,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:21:45,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:45,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:45,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:45,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:45,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:21:45,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069706595] [2020-10-26 19:21:45,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:45,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:21:45,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187406635] [2020-10-26 19:21:45,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:21:45,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:45,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:21:45,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:21:45,755 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 15 states. [2020-10-26 19:21:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:46,771 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-10-26 19:21:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:21:46,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-26 19:21:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:46,775 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:21:46,776 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:21:46,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:21:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:21:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2020-10-26 19:21:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:21:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-26 19:21:46,810 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 30 [2020-10-26 19:21:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:46,811 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-26 19:21:46,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:21:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-26 19:21:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:21:46,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:46,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:46,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:21:46,816 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash -935650316, now seen corresponding path program 1 times [2020-10-26 19:21:46,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:46,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334491155] [2020-10-26 19:21:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:46,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:49,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:50,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:21:50,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:21:50,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3163 [2020-10-26 19:21:50,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:50,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:21:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:21:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:21:50,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:50,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:50,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:50,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:50,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:21:50,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:50,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:50,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:50,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:50,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:21:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:21:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:50,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:50,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:21:50,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:50,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:50,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:21:50,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:50,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:21:50,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334491155] [2020-10-26 19:21:50,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:50,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:21:50,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131634045] [2020-10-26 19:21:50,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:21:50,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:50,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:21:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:50,091 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 5 states. [2020-10-26 19:21:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:50,240 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-10-26 19:21:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:21:50,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-26 19:21:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:50,241 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:21:50,242 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:21:50,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:21:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-26 19:21:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:21:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-26 19:21:50,263 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2020-10-26 19:21:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:50,263 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-26 19:21:50,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:21:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-26 19:21:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:21:50,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:50,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:50,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:21:50,266 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1179011292, now seen corresponding path program 3 times [2020-10-26 19:21:50,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:50,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961920017] [2020-10-26 19:21:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:50,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:53,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:55,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:55,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:55,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:21:55,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:21:55,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-26 19:21:55,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:21:55,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:21:55,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:56,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:56,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:56,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:56,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:21:56,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961920017] [2020-10-26 19:21:56,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:56,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:21:56,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33679845] [2020-10-26 19:21:56,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:21:56,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:21:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:21:56,385 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 17 states. [2020-10-26 19:21:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:57,539 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-10-26 19:21:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:21:57,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-26 19:21:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:57,541 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:21:57,541 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:21:57,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:21:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:21:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 67. [2020-10-26 19:21:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:21:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-26 19:21:57,558 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 37 [2020-10-26 19:21:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:57,559 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-26 19:21:57,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:21:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-26 19:21:57,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:21:57,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:57,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:57,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:21:57,561 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1481062968, now seen corresponding path program 2 times [2020-10-26 19:21:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:57,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887348308] [2020-10-26 19:21:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:00,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:02,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:22:02,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:22:02,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:22:02,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:02,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:22:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:02,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:22:02,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:02,992 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 24 [2020-10-26 19:22:03,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:03,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:03,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:03,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:03,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:03,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:03,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:22:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:03,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:03,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:03,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:03,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:22:03,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:22:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:22:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:22:03,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:03,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887348308] [2020-10-26 19:22:03,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:03,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:22:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113752170] [2020-10-26 19:22:03,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:22:03,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:03,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:22:03,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:22:03,717 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 20 states. [2020-10-26 19:22:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:04,440 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-26 19:22:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:22:04,441 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-26 19:22:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:04,444 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:22:04,444 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:22:04,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:22:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:22:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-26 19:22:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:22:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-26 19:22:04,460 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 43 [2020-10-26 19:22:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:04,460 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-26 19:22:04,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:22:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-26 19:22:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:22:04,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:04,462 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:04,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:22:04,462 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:04,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1030396438, now seen corresponding path program 4 times [2020-10-26 19:22:04,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:04,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581374133] [2020-10-26 19:22:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:04,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:04,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:04,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:06,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:09,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:09,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:22:09,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:22:09,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:22:09,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:22:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:09,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:22:09,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:10,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:10,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:10,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:10,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:10,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:10,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:10,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:10,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:22:10,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581374133] [2020-10-26 19:22:10,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:10,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:22:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873255384] [2020-10-26 19:22:10,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:22:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:10,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:22:10,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:22:10,474 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 18 states. [2020-10-26 19:22:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:11,562 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2020-10-26 19:22:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:22:11,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-26 19:22:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:11,564 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:22:11,564 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:22:11,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:22:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:22:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2020-10-26 19:22:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:22:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-26 19:22:11,583 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 43 [2020-10-26 19:22:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:11,583 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-26 19:22:11,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:22:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-26 19:22:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:22:11,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:11,585 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:11,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:22:11,585 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:11,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1632870324, now seen corresponding path program 3 times [2020-10-26 19:22:11,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:11,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261288165] [2020-10-26 19:22:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:11,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:11,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:11,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:11,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:16,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:22:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:16,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:16,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:16,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:16,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:16,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:16,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:16,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:16,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:22:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:16,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:16,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:16,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:16,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:16,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:16,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:16,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:22:16,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261288165] [2020-10-26 19:22:16,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:16,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:22:16,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840338486] [2020-10-26 19:22:16,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:22:16,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:22:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:22:16,676 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 6 states. [2020-10-26 19:22:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:16,814 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2020-10-26 19:22:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:22:16,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-26 19:22:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:16,816 INFO L225 Difference]: With dead ends: 149 [2020-10-26 19:22:16,816 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:22:16,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:22:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:22:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-26 19:22:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:22:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-26 19:22:16,838 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 47 [2020-10-26 19:22:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:16,838 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-26 19:22:16,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:22:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-26 19:22:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:22:16,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:16,840 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:16,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:22:16,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1572943098, now seen corresponding path program 5 times [2020-10-26 19:22:16,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:16,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542546268] [2020-10-26 19:22:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:16,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:16,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:21,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:22:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:21,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:21,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:21,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:21,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:21,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:21,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:21,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:21,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:21,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:21,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:21,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:22:21,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542546268] [2020-10-26 19:22:21,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:21,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:22:21,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928909472] [2020-10-26 19:22:21,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:22:21,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:21,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:22:21,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:22:21,925 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 7 states. [2020-10-26 19:22:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:22,066 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-10-26 19:22:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:22:22,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-10-26 19:22:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:22,068 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:22:22,068 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:22:22,069 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 [2020-10-26 19:22:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:22:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-26 19:22:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:22:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-26 19:22:22,090 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 50 [2020-10-26 19:22:22,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:22,091 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-26 19:22:22,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:22:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-26 19:22:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:22:22,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:22,094 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:22,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:22:22,094 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2056143216, now seen corresponding path program 6 times [2020-10-26 19:22:22,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:22,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044855474] [2020-10-26 19:22:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:22,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:22,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:27,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:22:27,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:27,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:27,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:27,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:27,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:27,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:27,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:27,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:27,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:27,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:27,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:22:27,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044855474] [2020-10-26 19:22:27,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:27,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:22:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035056375] [2020-10-26 19:22:27,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:22:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:22:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:22:27,204 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 8 states. [2020-10-26 19:22:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:27,372 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2020-10-26 19:22:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:22:27,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-10-26 19:22:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:27,376 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:22:27,376 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:22:27,377 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 [2020-10-26 19:22:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:22:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-26 19:22:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:22:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-26 19:22:27,395 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 51 [2020-10-26 19:22:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:27,395 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-26 19:22:27,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:22:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-26 19:22:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:22:27,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:27,398 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:27,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:22:27,399 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash 599583362, now seen corresponding path program 7 times [2020-10-26 19:22:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038504892] [2020-10-26 19:22:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:27,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:32,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:32,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:22:32,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:22:32,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:22:32,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:22:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:22:32,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:32,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:32,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:32,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:32,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:32,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:32,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:22:32,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:32,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:22:32,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038504892] [2020-10-26 19:22:32,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:32,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:22:32,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832031875] [2020-10-26 19:22:32,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:22:32,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:22:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:22:32,518 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 9 states. [2020-10-26 19:22:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:32,681 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2020-10-26 19:22:32,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:22:32,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-26 19:22:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:32,682 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:22:32,682 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:22:32,683 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 [2020-10-26 19:22:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:22:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-26 19:22:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:22:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-26 19:22:32,693 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 56 [2020-10-26 19:22:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:32,694 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-26 19:22:32,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:22:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-26 19:22:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:22:32,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:32,695 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:32,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:22:32,695 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:32,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1437119546, now seen corresponding path program 8 times [2020-10-26 19:22:32,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:32,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197984147] [2020-10-26 19:22:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:32,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:32,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:32,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:34,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:22:37,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:37,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:37,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:37,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:37,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:37,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:37,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:37,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:37,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:37,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 19:22:37,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197984147] [2020-10-26 19:22:37,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:37,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:22:37,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430941187] [2020-10-26 19:22:37,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:22:37,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:22:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:22:37,793 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 10 states. [2020-10-26 19:22:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:37,985 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2020-10-26 19:22:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:22:37,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-26 19:22:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:37,987 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:22:37,987 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:22:37,989 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 [2020-10-26 19:22:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:22:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-26 19:22:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:22:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-26 19:22:38,003 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2020-10-26 19:22:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:38,003 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-26 19:22:38,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:22:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-26 19:22:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:22:38,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:38,006 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:38,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:22:38,006 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:38,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2078789194, now seen corresponding path program 9 times [2020-10-26 19:22:38,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:38,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612118519] [2020-10-26 19:22:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:38,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:38,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:43,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:22:43,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:43,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:43,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:43,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:43,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:43,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:43,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:22:43,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612118519] [2020-10-26 19:22:43,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:43,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:22:43,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71459018] [2020-10-26 19:22:43,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:22:43,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:22:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:22:43,159 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 11 states. [2020-10-26 19:22:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:43,386 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2020-10-26 19:22:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:22:43,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-26 19:22:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:43,388 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:22:43,388 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:22:43,389 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 [2020-10-26 19:22:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:22:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-26 19:22:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:22:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:22:43,404 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 70 [2020-10-26 19:22:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:43,404 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:22:43,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:22:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:22:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:22:43,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:43,406 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:43,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:22:43,406 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1586569850, now seen corresponding path program 10 times [2020-10-26 19:22:43,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:43,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281482301] [2020-10-26 19:22:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:43,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:43,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:43,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:48,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:22:48,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:48,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:48,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:48,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:48,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:48,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:48,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:48,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:48,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:48,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-26 19:22:48,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281482301] [2020-10-26 19:22:48,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:48,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:22:48,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734165630] [2020-10-26 19:22:48,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:22:48,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:22:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:48,600 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 12 states. [2020-10-26 19:22:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:48,816 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-26 19:22:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:22:48,817 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-26 19:22:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:48,818 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:22:48,818 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:22:48,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:22:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-26 19:22:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:22:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-26 19:22:48,833 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2020-10-26 19:22:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:48,833 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-26 19:22:48,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:22:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-26 19:22:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:22:48,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:48,834 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:48,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:22:48,835 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:48,835 INFO L82 PathProgramCache]: Analyzing trace with hash -522577174, now seen corresponding path program 11 times [2020-10-26 19:22:48,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:48,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426891136] [2020-10-26 19:22:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:48,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:53,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:22:53,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:22:53,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:22:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:53,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:22:53,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:54,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:54,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:54,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:54,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:54,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:54,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:54,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:54,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:54,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-26 19:22:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426891136] [2020-10-26 19:22:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:22:54,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481607477] [2020-10-26 19:22:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:22:54,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:54,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:22:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:54,026 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 13 states. [2020-10-26 19:22:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:54,228 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2020-10-26 19:22:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:22:54,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-26 19:22:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:54,229 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:22:54,229 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:22:54,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:22:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-26 19:22:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:22:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-26 19:22:54,243 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 84 [2020-10-26 19:22:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:54,243 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-26 19:22:54,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:22:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-26 19:22:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:22:54,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:54,244 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:54,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:22:54,245 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1012054830, now seen corresponding path program 12 times [2020-10-26 19:22:54,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:54,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436264477] [2020-10-26 19:22:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:54,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:54,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:22:59,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:59,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:59,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:59,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:59,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:59,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:59,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:59,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-26 19:22:59,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436264477] [2020-10-26 19:22:59,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:59,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:22:59,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838161867] [2020-10-26 19:22:59,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:22:59,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:22:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:22:59,441 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 14 states. [2020-10-26 19:22:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:59,711 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-10-26 19:22:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:22:59,711 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 91 [2020-10-26 19:22:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:59,712 INFO L225 Difference]: With dead ends: 185 [2020-10-26 19:22:59,712 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:22:59,713 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 [2020-10-26 19:22:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:22:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-26 19:22:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:22:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-26 19:22:59,727 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2020-10-26 19:22:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:59,727 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-26 19:22:59,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:22:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-26 19:22:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:22:59,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:59,728 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:59,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:22:59,729 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash 87270942, now seen corresponding path program 13 times [2020-10-26 19:22:59,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:59,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576369409] [2020-10-26 19:22:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:59,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:04,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:23:04,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:04,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:23:04,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:23:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:23:04,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:04,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:04,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:04,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:04,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:04,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:04,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:04,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-26 19:23:04,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576369409] [2020-10-26 19:23:04,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:04,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:23:04,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910232681] [2020-10-26 19:23:04,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:23:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:23:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:23:04,920 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 15 states. [2020-10-26 19:23:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:05,228 INFO L93 Difference]: Finished difference Result 198 states and 209 transitions. [2020-10-26 19:23:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:23:05,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2020-10-26 19:23:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:05,230 INFO L225 Difference]: With dead ends: 198 [2020-10-26 19:23:05,230 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:23:05,231 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 [2020-10-26 19:23:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:23:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-10-26 19:23:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:23:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:23:05,244 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 98 [2020-10-26 19:23:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:05,244 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:23:05,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:23:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:23:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:23:05,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:05,245 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:05,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:23:05,246 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:05,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1022694882, now seen corresponding path program 14 times [2020-10-26 19:23:05,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:05,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458335224] [2020-10-26 19:23:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:05,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:05,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:23:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:10,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:10,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:10,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:10,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:10,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:10,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:10,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-10-26 19:23:10,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458335224] [2020-10-26 19:23:10,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:10,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:23:10,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738054410] [2020-10-26 19:23:10,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:23:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:10,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:23:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:23:10,530 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 16 states. [2020-10-26 19:23:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:10,817 INFO L93 Difference]: Finished difference Result 211 states and 222 transitions. [2020-10-26 19:23:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:23:10,818 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-10-26 19:23:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:10,819 INFO L225 Difference]: With dead ends: 211 [2020-10-26 19:23:10,819 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:23:10,820 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 [2020-10-26 19:23:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:23:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-26 19:23:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:23:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-26 19:23:10,833 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2020-10-26 19:23:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:10,833 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-26 19:23:10,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:23:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-26 19:23:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:23:10,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:10,835 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:10,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:23:10,835 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:10,836 INFO L82 PathProgramCache]: Analyzing trace with hash -136981678, now seen corresponding path program 15 times [2020-10-26 19:23:10,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:10,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756853286] [2020-10-26 19:23:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:10,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:11,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:15,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:23:15,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:15,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:23:15,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:15,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:23:15,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:15,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:23:15,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:16,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:16,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:16,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:16,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:16,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:16,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:16,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:16,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:16,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:16,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:16,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-26 19:23:16,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756853286] [2020-10-26 19:23:16,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:16,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:23:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891468425] [2020-10-26 19:23:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:23:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:23:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:23:16,064 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 17 states. [2020-10-26 19:23:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:16,387 INFO L93 Difference]: Finished difference Result 224 states and 235 transitions. [2020-10-26 19:23:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:23:16,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-26 19:23:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:16,389 INFO L225 Difference]: With dead ends: 224 [2020-10-26 19:23:16,389 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:23:16,390 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 [2020-10-26 19:23:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:23:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-10-26 19:23:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:23:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-10-26 19:23:16,404 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 112 [2020-10-26 19:23:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:16,404 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-10-26 19:23:16,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:23:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-10-26 19:23:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 19:23:16,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:16,406 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:16,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:23:16,406 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1085197674, now seen corresponding path program 16 times [2020-10-26 19:23:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:16,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222418189] [2020-10-26 19:23:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:16,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:16,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5143 [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:23:21,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:21,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:21,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-26 19:23:21,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222418189] [2020-10-26 19:23:21,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:21,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:23:21,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623664672] [2020-10-26 19:23:21,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:23:21,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:23:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:23:21,794 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 18 states. [2020-10-26 19:23:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:22,151 INFO L93 Difference]: Finished difference Result 237 states and 248 transitions. [2020-10-26 19:23:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:23:22,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2020-10-26 19:23:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:22,153 INFO L225 Difference]: With dead ends: 237 [2020-10-26 19:23:22,153 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:23:22,154 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 [2020-10-26 19:23:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:23:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-26 19:23:22,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:23:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2020-10-26 19:23:22,171 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 119 [2020-10-26 19:23:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:22,171 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2020-10-26 19:23:22,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:23:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2020-10-26 19:23:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 19:23:22,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:22,173 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:22,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:23:22,173 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash -84827514, now seen corresponding path program 17 times [2020-10-26 19:23:22,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:22,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047662226] [2020-10-26 19:23:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:22,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:22,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:22,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:27,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:27,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:23:27,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:27,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-26 19:23:27,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:27,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:23:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:23:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:27,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:27,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:27,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:27,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:27,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:27,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:27,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:27,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-26 19:23:27,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047662226] [2020-10-26 19:23:27,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:27,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:23:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686353659] [2020-10-26 19:23:27,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:23:27,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:23:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:23:27,582 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 19 states. [2020-10-26 19:23:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:27,882 INFO L93 Difference]: Finished difference Result 250 states and 261 transitions. [2020-10-26 19:23:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:23:27,883 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 126 [2020-10-26 19:23:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:27,884 INFO L225 Difference]: With dead ends: 250 [2020-10-26 19:23:27,887 INFO L226 Difference]: Without dead ends: 141 [2020-10-26 19:23:27,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:23:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-26 19:23:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-10-26 19:23:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:23:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:23:27,901 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 126 [2020-10-26 19:23:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:27,901 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:23:27,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:23:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:23:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:23:27,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:27,903 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:27,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:23:27,903 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 130027850, now seen corresponding path program 18 times [2020-10-26 19:23:27,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:27,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413606442] [2020-10-26 19:23:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:27,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:28,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:33,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:33,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:23:33,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:33,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-26 19:23:33,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:33,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:23:33,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:33,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:23:33,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:33,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:33,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2020-10-26 19:23:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413606442] [2020-10-26 19:23:33,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:33,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:23:33,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018770133] [2020-10-26 19:23:33,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:23:33,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:23:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:23:33,376 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 20 states. [2020-10-26 19:23:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:33,740 INFO L93 Difference]: Finished difference Result 263 states and 274 transitions. [2020-10-26 19:23:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:23:33,744 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 133 [2020-10-26 19:23:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:33,745 INFO L225 Difference]: With dead ends: 263 [2020-10-26 19:23:33,745 INFO L226 Difference]: Without dead ends: 148 [2020-10-26 19:23:33,746 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 [2020-10-26 19:23:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-26 19:23:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2020-10-26 19:23:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-26 19:23:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2020-10-26 19:23:33,762 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2020-10-26 19:23:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:33,763 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2020-10-26 19:23:33,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:23:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2020-10-26 19:23:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-26 19:23:33,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:33,764 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:33,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:23:33,765 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1942481990, now seen corresponding path program 19 times [2020-10-26 19:23:33,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:33,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011240386] [2020-10-26 19:23:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:33,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:33,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:38,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:38,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 19:23:38,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:38,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 19:23:38,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:23:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:38,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:23:38,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:39,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:39,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:39,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:39,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-10-26 19:23:39,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011240386] [2020-10-26 19:23:39,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:39,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:23:39,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056553042] [2020-10-26 19:23:39,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:23:39,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:39,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:23:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:23:39,146 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand 21 states. [2020-10-26 19:23:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:39,573 INFO L93 Difference]: Finished difference Result 276 states and 287 transitions. [2020-10-26 19:23:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:23:39,573 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 140 [2020-10-26 19:23:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:39,575 INFO L225 Difference]: With dead ends: 276 [2020-10-26 19:23:39,575 INFO L226 Difference]: Without dead ends: 155 [2020-10-26 19:23:39,576 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 [2020-10-26 19:23:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-26 19:23:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-26 19:23:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-26 19:23:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-26 19:23:39,595 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 140 [2020-10-26 19:23:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:39,595 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-26 19:23:39,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:23:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-26 19:23:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 19:23:39,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:39,597 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:39,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:23:39,597 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1071992322, now seen corresponding path program 20 times [2020-10-26 19:23:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:39,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342466747] [2020-10-26 19:23:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:39,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:39,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:39,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:44,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 19:23:44,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:44,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:23:44,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:44,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:23:44,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:44,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:23:44,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:44,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:44,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:44,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:44,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:44,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:44,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:44,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:44,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:44,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-26 19:23:44,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342466747] [2020-10-26 19:23:44,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:44,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:23:44,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517517350] [2020-10-26 19:23:44,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:23:44,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:23:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:23:44,996 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 22 states. [2020-10-26 19:23:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:45,404 INFO L93 Difference]: Finished difference Result 289 states and 300 transitions. [2020-10-26 19:23:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:23:45,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 147 [2020-10-26 19:23:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:45,406 INFO L225 Difference]: With dead ends: 289 [2020-10-26 19:23:45,406 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:23:45,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:23:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:23:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-26 19:23:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-26 19:23:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2020-10-26 19:23:45,422 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2020-10-26 19:23:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:45,423 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2020-10-26 19:23:45,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:23:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2020-10-26 19:23:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:23:45,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:45,425 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:45,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:23:45,425 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1692018414, now seen corresponding path program 21 times [2020-10-26 19:23:45,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:45,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917462944] [2020-10-26 19:23:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:45,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:45,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:50,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:23:50,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:50,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:50,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:50,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:50,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:50,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:50,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-26 19:23:50,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917462944] [2020-10-26 19:23:50,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:50,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:23:50,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395659411] [2020-10-26 19:23:50,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:23:50,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:50,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:23:50,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:23:50,832 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 23 states. [2020-10-26 19:23:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:51,243 INFO L93 Difference]: Finished difference Result 302 states and 313 transitions. [2020-10-26 19:23:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:23:51,243 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 154 [2020-10-26 19:23:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:51,245 INFO L225 Difference]: With dead ends: 302 [2020-10-26 19:23:51,245 INFO L226 Difference]: Without dead ends: 169 [2020-10-26 19:23:51,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:23:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-26 19:23:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-10-26 19:23:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-26 19:23:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2020-10-26 19:23:51,262 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 154 [2020-10-26 19:23:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:51,262 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2020-10-26 19:23:51,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:23:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2020-10-26 19:23:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-26 19:23:51,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:51,264 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:51,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:23:51,265 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2008683698, now seen corresponding path program 22 times [2020-10-26 19:23:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:51,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397563984] [2020-10-26 19:23:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:51,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:51,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:56,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:56,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-26 19:23:56,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:56,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-26 19:23:56,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:56,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:23:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:56,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:23:56,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:56,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:56,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:56,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:56,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:56,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:56,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:56,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:56,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-26 19:23:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397563984] [2020-10-26 19:23:56,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:56,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:23:56,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171966207] [2020-10-26 19:23:56,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:23:56,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:56,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:23:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:23:56,724 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 24 states. [2020-10-26 19:23:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:57,198 INFO L93 Difference]: Finished difference Result 315 states and 326 transitions. [2020-10-26 19:23:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:23:57,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 161 [2020-10-26 19:23:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:57,203 INFO L225 Difference]: With dead ends: 315 [2020-10-26 19:23:57,203 INFO L226 Difference]: Without dead ends: 176 [2020-10-26 19:23:57,203 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 [2020-10-26 19:23:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-26 19:23:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-26 19:23:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-26 19:23:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2020-10-26 19:23:57,218 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 161 [2020-10-26 19:23:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:57,219 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2020-10-26 19:23:57,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:23:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2020-10-26 19:23:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-26 19:23:57,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:57,220 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:57,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:23:57,220 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2039012386, now seen corresponding path program 23 times [2020-10-26 19:23:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:57,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078385435] [2020-10-26 19:23:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:02,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:02,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-26 19:24:02,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:02,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5302 [2020-10-26 19:24:02,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:02,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:24:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:02,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:24:02,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:02,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:02,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:02,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:02,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:02,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:02,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:02,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:02,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-26 19:24:02,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078385435] [2020-10-26 19:24:02,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:02,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:24:02,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928288710] [2020-10-26 19:24:02,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:24:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:24:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:24:02,946 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 25 states. [2020-10-26 19:24:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:03,440 INFO L93 Difference]: Finished difference Result 328 states and 339 transitions. [2020-10-26 19:24:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:24:03,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 168 [2020-10-26 19:24:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:03,443 INFO L225 Difference]: With dead ends: 328 [2020-10-26 19:24:03,443 INFO L226 Difference]: Without dead ends: 183 [2020-10-26 19:24:03,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:24:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-26 19:24:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-10-26 19:24:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-26 19:24:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-10-26 19:24:03,463 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 168 [2020-10-26 19:24:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:03,464 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-10-26 19:24:03,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:24:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-10-26 19:24:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-26 19:24:03,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:03,465 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:03,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:24:03,466 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash 595016038, now seen corresponding path program 24 times [2020-10-26 19:24:03,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:03,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132453265] [2020-10-26 19:24:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:03,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:08,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:08,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-26 19:24:08,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5478 [2020-10-26 19:24:08,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:24:08,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:08,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:24:08,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:09,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:09,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:09,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:09,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:09,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:09,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:09,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:09,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:09,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:09,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-26 19:24:09,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132453265] [2020-10-26 19:24:09,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:09,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:24:09,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453557665] [2020-10-26 19:24:09,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:24:09,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:24:09,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:24:09,413 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 26 states. [2020-10-26 19:24:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:09,813 INFO L93 Difference]: Finished difference Result 341 states and 352 transitions. [2020-10-26 19:24:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:24:09,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 175 [2020-10-26 19:24:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:09,814 INFO L225 Difference]: With dead ends: 341 [2020-10-26 19:24:09,815 INFO L226 Difference]: Without dead ends: 190 [2020-10-26 19:24:09,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:24:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-26 19:24:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-26 19:24:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-26 19:24:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2020-10-26 19:24:09,836 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 175 [2020-10-26 19:24:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:09,836 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2020-10-26 19:24:09,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:24:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2020-10-26 19:24:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 19:24:09,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:09,838 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:09,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:24:09,838 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash -92982442, now seen corresponding path program 25 times [2020-10-26 19:24:09,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:09,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167357042] [2020-10-26 19:24:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:09,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:10,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:10,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:15,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5787 [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:24:15,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:16,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:16,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:16,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:16,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:16,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:16,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:16,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:16,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:16,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2020-10-26 19:24:16,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167357042] [2020-10-26 19:24:16,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:16,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:24:16,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849814933] [2020-10-26 19:24:16,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:24:16,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:16,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:24:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:24:16,139 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand 27 states. [2020-10-26 19:24:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:16,647 INFO L93 Difference]: Finished difference Result 354 states and 365 transitions. [2020-10-26 19:24:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:24:16,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 182 [2020-10-26 19:24:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:16,649 INFO L225 Difference]: With dead ends: 354 [2020-10-26 19:24:16,649 INFO L226 Difference]: Without dead ends: 197 [2020-10-26 19:24:16,650 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 [2020-10-26 19:24:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-26 19:24:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-10-26 19:24:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-26 19:24:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-10-26 19:24:16,674 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 182 [2020-10-26 19:24:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:16,675 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-10-26 19:24:16,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:24:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-10-26 19:24:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-26 19:24:16,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:16,677 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:16,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:24:16,677 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1649729510, now seen corresponding path program 26 times [2020-10-26 19:24:16,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:16,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479720313] [2020-10-26 19:24:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:16,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:16,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:16,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:22,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:22,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 19:24:22,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:22,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5462 [2020-10-26 19:24:22,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:24:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:24:22,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:22,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:22,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:22,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:22,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:22,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:22,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:22,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2020-10-26 19:24:22,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479720313] [2020-10-26 19:24:22,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:22,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:24:22,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311052981] [2020-10-26 19:24:22,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:24:22,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:24:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:24:22,656 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 28 states. [2020-10-26 19:24:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:23,202 INFO L93 Difference]: Finished difference Result 367 states and 378 transitions. [2020-10-26 19:24:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:24:23,203 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 189 [2020-10-26 19:24:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:23,204 INFO L225 Difference]: With dead ends: 367 [2020-10-26 19:24:23,204 INFO L226 Difference]: Without dead ends: 204 [2020-10-26 19:24:23,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:24:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-26 19:24:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-26 19:24:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-26 19:24:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2020-10-26 19:24:23,225 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 189 [2020-10-26 19:24:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:23,225 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2020-10-26 19:24:23,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:24:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2020-10-26 19:24:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-26 19:24:23,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:23,227 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:23,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:24:23,227 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1397763210, now seen corresponding path program 27 times [2020-10-26 19:24:23,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:23,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428511598] [2020-10-26 19:24:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:28,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5265 [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:24:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:28,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:29,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:29,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:29,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2020-10-26 19:24:29,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428511598] [2020-10-26 19:24:29,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:29,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:24:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387145882] [2020-10-26 19:24:29,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:24:29,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:29,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:24:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:24:29,036 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand 29 states. [2020-10-26 19:24:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:29,605 INFO L93 Difference]: Finished difference Result 380 states and 391 transitions. [2020-10-26 19:24:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:24:29,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 196 [2020-10-26 19:24:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:29,607 INFO L225 Difference]: With dead ends: 380 [2020-10-26 19:24:29,607 INFO L226 Difference]: Without dead ends: 211 [2020-10-26 19:24:29,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:24:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-26 19:24:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-26 19:24:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-26 19:24:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2020-10-26 19:24:29,628 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 196 [2020-10-26 19:24:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:29,628 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2020-10-26 19:24:29,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:24:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2020-10-26 19:24:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 19:24:29,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:29,630 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:29,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:24:29,630 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:29,630 INFO L82 PathProgramCache]: Analyzing trace with hash 640600270, now seen corresponding path program 28 times [2020-10-26 19:24:29,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:29,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846676813] [2020-10-26 19:24:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:29,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5618 [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:24:35,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:35,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:35,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:35,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:35,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:35,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:35,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:35,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2020-10-26 19:24:35,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846676813] [2020-10-26 19:24:35,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:35,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:24:35,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55762538] [2020-10-26 19:24:35,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:24:35,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:24:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:24:35,870 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand 30 states. [2020-10-26 19:24:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:36,418 INFO L93 Difference]: Finished difference Result 393 states and 404 transitions. [2020-10-26 19:24:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:24:36,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 203 [2020-10-26 19:24:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:36,421 INFO L225 Difference]: With dead ends: 393 [2020-10-26 19:24:36,421 INFO L226 Difference]: Without dead ends: 218 [2020-10-26 19:24:36,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:24:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-26 19:24:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-10-26 19:24:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-26 19:24:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 219 transitions. [2020-10-26 19:24:36,442 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 219 transitions. Word has length 203 [2020-10-26 19:24:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:36,443 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 219 transitions. [2020-10-26 19:24:36,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:24:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 219 transitions. [2020-10-26 19:24:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:24:36,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:36,444 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:36,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:24:36,445 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:36,445 INFO L82 PathProgramCache]: Analyzing trace with hash 726321086, now seen corresponding path program 29 times [2020-10-26 19:24:36,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:36,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057261201] [2020-10-26 19:24:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:36,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:41,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:41,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 19:24:41,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:41,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5446 [2020-10-26 19:24:41,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:24:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:24:41,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:42,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:42,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:42,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:42,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:42,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:42,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:42,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:42,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:42,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2020-10-26 19:24:42,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057261201] [2020-10-26 19:24:42,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:42,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:24:42,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891042075] [2020-10-26 19:24:42,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:24:42,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:42,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:24:42,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:24:42,498 INFO L87 Difference]: Start difference. First operand 215 states and 219 transitions. Second operand 31 states. [2020-10-26 19:24:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:43,135 INFO L93 Difference]: Finished difference Result 406 states and 417 transitions. [2020-10-26 19:24:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:24:43,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 210 [2020-10-26 19:24:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:43,141 INFO L225 Difference]: With dead ends: 406 [2020-10-26 19:24:43,141 INFO L226 Difference]: Without dead ends: 225 [2020-10-26 19:24:43,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:24:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-26 19:24:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-26 19:24:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-26 19:24:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2020-10-26 19:24:43,170 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 210 [2020-10-26 19:24:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:43,170 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2020-10-26 19:24:43,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:24:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2020-10-26 19:24:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 19:24:43,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:43,172 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:43,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:24:43,172 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash -497339518, now seen corresponding path program 30 times [2020-10-26 19:24:43,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:43,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194622374] [2020-10-26 19:24:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:43,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:43,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:48,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:48,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-26 19:24:48,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:48,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5365 [2020-10-26 19:24:48,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:48,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:24:48,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:48,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:24:48,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:49,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:49,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:49,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:49,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:49,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:49,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:49,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:49,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:49,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:49,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:49,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2020-10-26 19:24:49,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194622374] [2020-10-26 19:24:49,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:49,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:24:49,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531740619] [2020-10-26 19:24:49,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:24:49,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:24:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:24:49,205 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand 32 states. [2020-10-26 19:24:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:49,757 INFO L93 Difference]: Finished difference Result 419 states and 430 transitions. [2020-10-26 19:24:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:24:49,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 217 [2020-10-26 19:24:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:49,759 INFO L225 Difference]: With dead ends: 419 [2020-10-26 19:24:49,759 INFO L226 Difference]: Without dead ends: 232 [2020-10-26 19:24:49,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:24:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-26 19:24:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2020-10-26 19:24:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-26 19:24:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 233 transitions. [2020-10-26 19:24:49,782 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 233 transitions. Word has length 217 [2020-10-26 19:24:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:49,782 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 233 transitions. [2020-10-26 19:24:49,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:24:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 233 transitions. [2020-10-26 19:24:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-26 19:24:49,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:49,784 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:49,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:24:49,784 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1695941874, now seen corresponding path program 31 times [2020-10-26 19:24:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:49,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265739926] [2020-10-26 19:24:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:49,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:49,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:55,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6091 [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:24:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:56,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:56,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2020-10-26 19:24:56,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265739926] [2020-10-26 19:24:56,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:56,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:24:56,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885088294] [2020-10-26 19:24:56,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:24:56,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:56,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:24:56,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:56,576 INFO L87 Difference]: Start difference. First operand 229 states and 233 transitions. Second operand 33 states. [2020-10-26 19:24:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:57,192 INFO L93 Difference]: Finished difference Result 432 states and 443 transitions. [2020-10-26 19:24:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:24:57,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 224 [2020-10-26 19:24:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:57,194 INFO L225 Difference]: With dead ends: 432 [2020-10-26 19:24:57,195 INFO L226 Difference]: Without dead ends: 239 [2020-10-26 19:24:57,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-26 19:24:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2020-10-26 19:24:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-26 19:24:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2020-10-26 19:24:57,213 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 224 [2020-10-26 19:24:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:57,213 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2020-10-26 19:24:57,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:24:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2020-10-26 19:24:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-26 19:24:57,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:57,215 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:57,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:24:57,215 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:57,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:57,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1560895542, now seen corresponding path program 32 times [2020-10-26 19:24:57,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:57,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534121645] [2020-10-26 19:24:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:57,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:57,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:02,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5240 [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:25:02,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:03,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:03,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:03,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:03,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:03,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:03,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:03,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:03,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:03,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:03,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:03,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2700 trivial. 0 not checked. [2020-10-26 19:25:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534121645] [2020-10-26 19:25:03,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:03,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:25:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780537551] [2020-10-26 19:25:03,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:25:03,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:25:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:25:03,171 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand 34 states. [2020-10-26 19:25:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:03,889 INFO L93 Difference]: Finished difference Result 445 states and 456 transitions. [2020-10-26 19:25:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:25:03,889 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 231 [2020-10-26 19:25:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:03,891 INFO L225 Difference]: With dead ends: 445 [2020-10-26 19:25:03,891 INFO L226 Difference]: Without dead ends: 246 [2020-10-26 19:25:03,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:25:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-26 19:25:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-26 19:25:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-26 19:25:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 247 transitions. [2020-10-26 19:25:03,915 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 247 transitions. Word has length 231 [2020-10-26 19:25:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:03,915 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 247 transitions. [2020-10-26 19:25:03,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:25:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 247 transitions. [2020-10-26 19:25:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 19:25:03,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:03,917 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:03,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:25:03,918 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash 518186022, now seen corresponding path program 33 times [2020-10-26 19:25:03,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:03,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594530740] [2020-10-26 19:25:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:04,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:04,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5317 [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:25:09,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:09,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:09,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:09,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2020-10-26 19:25:10,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594530740] [2020-10-26 19:25:10,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:10,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:25:10,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941620874] [2020-10-26 19:25:10,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:25:10,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:10,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:25:10,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:25:10,015 INFO L87 Difference]: Start difference. First operand 243 states and 247 transitions. Second operand 35 states. [2020-10-26 19:25:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:10,633 INFO L93 Difference]: Finished difference Result 458 states and 469 transitions. [2020-10-26 19:25:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:25:10,634 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 238 [2020-10-26 19:25:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:10,636 INFO L225 Difference]: With dead ends: 458 [2020-10-26 19:25:10,636 INFO L226 Difference]: Without dead ends: 253 [2020-10-26 19:25:10,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:25:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-26 19:25:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2020-10-26 19:25:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-26 19:25:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 254 transitions. [2020-10-26 19:25:10,656 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 254 transitions. Word has length 238 [2020-10-26 19:25:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:10,656 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 254 transitions. [2020-10-26 19:25:10,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:25:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 254 transitions. [2020-10-26 19:25:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 19:25:10,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:10,658 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:10,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:25:10,658 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:10,658 INFO L82 PathProgramCache]: Analyzing trace with hash 110251754, now seen corresponding path program 34 times [2020-10-26 19:25:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:10,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666584044] [2020-10-26 19:25:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:11,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:16,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:16,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 19:25:16,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:25:16,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5307 [2020-10-26 19:25:16,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:16,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:25:16,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:16,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:25:16,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:16,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3072 trivial. 0 not checked. [2020-10-26 19:25:16,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666584044] [2020-10-26 19:25:16,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:16,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:25:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764019067] [2020-10-26 19:25:16,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:25:16,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:25:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:25:16,811 INFO L87 Difference]: Start difference. First operand 250 states and 254 transitions. Second operand 36 states. [2020-10-26 19:25:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:17,590 INFO L93 Difference]: Finished difference Result 471 states and 482 transitions. [2020-10-26 19:25:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:25:17,591 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 245 [2020-10-26 19:25:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:17,593 INFO L225 Difference]: With dead ends: 471 [2020-10-26 19:25:17,594 INFO L226 Difference]: Without dead ends: 260 [2020-10-26 19:25:17,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:25:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-26 19:25:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-10-26 19:25:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-26 19:25:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2020-10-26 19:25:17,616 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 245 [2020-10-26 19:25:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:17,616 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2020-10-26 19:25:17,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:25:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2020-10-26 19:25:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-26 19:25:17,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:17,618 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:17,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:25:17,618 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1302174374, now seen corresponding path program 35 times [2020-10-26 19:25:17,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:17,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542309674] [2020-10-26 19:25:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:17,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:18,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking...