/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=DEEPEST --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/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:11:04,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:11:04,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:11:04,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:11:04,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:11:04,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:11:04,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:11:04,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:11:04,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:11:04,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:11:04,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:11:04,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:11:04,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:11:04,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:11:04,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:11:04,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:11:04,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:11:04,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:11:04,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:11:04,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:11:04,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:11:04,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:11:04,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:11:04,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:11:04,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:11:04,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:11:04,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:11:04,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:11:04,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:11:04,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:11:04,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:11:04,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:11:04,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:11:04,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:11:04,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:11:04,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:11:04,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:11:04,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:11:04,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:11:04,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:11:04,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:11:04,366 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 [2020-10-27 20:11:04,419 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:11:04,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:11:04,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:11:04,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:11:04,424 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:11:04,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:11:04,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:11:04,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:11:04,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:11:04,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:11:04,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:11:04,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:11:04,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:11:04,427 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:11:04,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:11:04,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:11:04,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:11:04,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:11:04,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:11:04,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:11:04,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:11:04,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:11:04,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:11:04,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:11:04,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:11:04,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:11:04,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:11:04,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:11:04,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:11:04,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:11:04,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:11:04,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:11:04,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:11:04,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:11:04,983 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:11:04,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2020-10-27 20:11:05,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a19ac2f18/c2a2e075c1224e0d8051b96b58635695/FLAG3039d65d2 [2020-10-27 20:11:05,678 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:11:05,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2020-10-27 20:11:05,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a19ac2f18/c2a2e075c1224e0d8051b96b58635695/FLAG3039d65d2 [2020-10-27 20:11:06,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a19ac2f18/c2a2e075c1224e0d8051b96b58635695 [2020-10-27 20:11:06,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:11:06,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:11:06,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:06,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:11:06,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:11:06,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a83de79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06, skipping insertion in model container [2020-10-27 20:11:06,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:11:06,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:11:06,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:06,331 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:11:06,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:11:06,368 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:11:06,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06 WrapperNode [2020-10-27 20:11:06,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:11:06,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:11:06,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:11:06,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:11:06,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (1/1) ... [2020-10-27 20:11:06,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:11:06,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:11:06,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:11:06,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:11:06,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (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 [2020-10-27 20:11:06,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:11:06,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:11:06,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:11:06,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:11:06,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:11:06,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:11:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:11:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:11:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:11:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:11:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:11:06,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:11:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:11:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:11:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:11:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:11:06,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:11:06,973 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:11:06,974 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:11:06,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:06 BoogieIcfgContainer [2020-10-27 20:11:06,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:11:06,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:11:06,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:11:06,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:11:06,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:11:06" (1/3) ... [2020-10-27 20:11:06,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578d17fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:06, skipping insertion in model container [2020-10-27 20:11:06,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:11:06" (2/3) ... [2020-10-27 20:11:06,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578d17fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:11:06, skipping insertion in model container [2020-10-27 20:11:06,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:11:06" (3/3) ... [2020-10-27 20:11:06,991 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2020-10-27 20:11:07,006 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:11:07,011 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:11:07,031 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:11:07,092 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:11:07,093 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:11:07,093 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:11:07,093 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:11:07,093 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:11:07,093 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:11:07,094 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:11:07,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:11:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:11:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:11:07,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:07,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:07,128 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash 665310781, now seen corresponding path program 1 times [2020-10-27 20:11:07,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:07,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144299351] [2020-10-27 20:11:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:07,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:07,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:11:07,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:07,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-27 20:11:07,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:11:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:11:07,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:07,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:07,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:07,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:07,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:11:07,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:07,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:07,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144299351] [2020-10-27 20:11:07,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:07,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:11:07,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8679658] [2020-10-27 20:11:07,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:11:07,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:11:07,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:07,665 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:11:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:07,749 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-27 20:11:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:11:07,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:11:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:07,760 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:11:07,760 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:11:07,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:11:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:11:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:11:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:11:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:11:07,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:11:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:07,808 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:11:07,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:11:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:11:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:11:07,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:07,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:07,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:11:07,810 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash -364744009, now seen corresponding path program 1 times [2020-10-27 20:11:07,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:07,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735762907] [2020-10-27 20:11:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:07,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:11:08,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 20:11:08,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:11:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:11:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:08,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:08,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:08,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:11:08,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:08,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:08,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:08,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:08,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735762907] [2020-10-27 20:11:08,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:11:08,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:11:08,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374363694] [2020-10-27 20:11:08,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:11:08,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:11:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:11:08,088 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-27 20:11:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:08,140 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:11:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:11:08,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:11:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:08,141 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:11:08,142 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:11:08,151 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 [2020-10-27 20:11:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:11:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-27 20:11:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:11:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:11:08,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-27 20:11:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:08,159 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:11:08,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:11:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:11:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:11:08,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:08,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:08,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:11:08,161 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:08,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1375402741, now seen corresponding path program 1 times [2020-10-27 20:11:08,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:08,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187291243] [2020-10-27 20:11:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:08,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:11:08,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 20:11:08,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:11:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:11:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:08,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:08,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:08,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 20:11:08,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:08,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:08,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187291243] [2020-10-27 20:11:08,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:08,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:11:08,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778233904] [2020-10-27 20:11:08,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:11:08,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:08,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:11:08,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:08,436 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-27 20:11:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:08,507 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 20:11:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:11:08,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 20:11:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:08,508 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:11:08,508 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:11:08,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:11:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:11:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:11:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:11:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 20:11:08,516 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-27 20:11:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:08,516 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 20:11:08,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:11:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 20:11:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:11:08,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:08,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:08,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:11:08,518 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1380815949, now seen corresponding path program 2 times [2020-10-27 20:11:08,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:08,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887597127] [2020-10-27 20:11:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:08,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:11:08,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 20:11:08,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:11:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:11:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:08,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:08,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:08,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:11:08,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:08,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:08,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:08,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 20:11:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:08,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887597127] [2020-10-27 20:11:08,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:08,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:11:08,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31780948] [2020-10-27 20:11:08,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:11:08,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:08,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:11:08,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:08,758 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-27 20:11:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:08,846 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 20:11:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:11:08,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:11:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:08,847 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:11:08,847 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:11:08,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:11:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:11:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:11:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:11:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 20:11:08,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-27 20:11:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:08,855 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 20:11:08,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:11:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 20:11:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:11:08,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:08,856 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:08,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:11:08,856 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash -112155407, now seen corresponding path program 3 times [2020-10-27 20:11:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:08,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373247119] [2020-10-27 20:11:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:08,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:08,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:08,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:11:08,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 20:11:08,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:08,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:11:08,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:08,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:11:08,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:09,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:09,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:09,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:09,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:09,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:09,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:11:09,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:09,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:09,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:09,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373247119] [2020-10-27 20:11:09,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:09,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:11:09,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766452327] [2020-10-27 20:11:09,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:11:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:09,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:11:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:11:09,073 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-10-27 20:11:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:09,133 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 20:11:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:11:09,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 20:11:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:09,134 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:11:09,134 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:11:09,135 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 [2020-10-27 20:11:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:11:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:11:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:11:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 20:11:09,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-27 20:11:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:09,141 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 20:11:09,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:11:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 20:11:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:11:09,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:09,142 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:09,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:11:09,143 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:09,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:09,143 INFO L82 PathProgramCache]: Analyzing trace with hash -700086609, now seen corresponding path program 4 times [2020-10-27 20:11:09,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:09,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14618611] [2020-10-27 20:11:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:09,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:09,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:09,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:11:09,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:09,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 20:11:09,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:09,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:11:09,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:09,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:11:09,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:09,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:09,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:09,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:09,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:09,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:09,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:11:09,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:09,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:09,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:09,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14618611] [2020-10-27 20:11:09,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:09,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:11:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178799625] [2020-10-27 20:11:09,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:11:09,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:09,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:11:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:11:09,404 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-10-27 20:11:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:09,483 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 20:11:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:11:09,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 20:11:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:09,484 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:11:09,485 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:11:09,485 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 [2020-10-27 20:11:09,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:11:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 20:11:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:11:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 20:11:09,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-27 20:11:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:09,492 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 20:11:09,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:11:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 20:11:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:11:09,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:09,494 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:09,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:11:09,494 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1233711341, now seen corresponding path program 5 times [2020-10-27 20:11:09,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:09,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806228804] [2020-10-27 20:11:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:09,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:09,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:09,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:11:09,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 20:11:09,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:09,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:11:09,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:09,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:11:09,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:09,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:09,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:09,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:09,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:09,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:09,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:09,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:09,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:09,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:09,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806228804] [2020-10-27 20:11:09,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:09,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:11:09,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002308137] [2020-10-27 20:11:09,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:11:09,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:09,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:11:09,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:11:09,755 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-27 20:11:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:09,818 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 20:11:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:11:09,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 20:11:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:09,820 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:11:09,820 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:11:09,821 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 [2020-10-27 20:11:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:11:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:11:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:11:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 20:11:09,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-27 20:11:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:09,827 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 20:11:09,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:11:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 20:11:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:11:09,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:09,828 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:09,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:11:09,828 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -107297877, now seen corresponding path program 6 times [2020-10-27 20:11:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:09,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580055526] [2020-10-27 20:11:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:09,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:09,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:11:09,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 20:11:09,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:11:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:11:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:10,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:10,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:10,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:10,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:10,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:10,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:10,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:10,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:10,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:10,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580055526] [2020-10-27 20:11:10,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:10,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:11:10,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483307506] [2020-10-27 20:11:10,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:11:10,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:11:10,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:11:10,101 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-10-27 20:11:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:10,202 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 20:11:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:11:10,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 20:11:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:10,204 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:11:10,204 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:11:10,205 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 [2020-10-27 20:11:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:11:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 20:11:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:11:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 20:11:10,211 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-27 20:11:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:10,211 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 20:11:10,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:11:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 20:11:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:11:10,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:10,212 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:10,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:11:10,212 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash -326967575, now seen corresponding path program 7 times [2020-10-27 20:11:10,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:10,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366200126] [2020-10-27 20:11:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:10,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:10,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:10,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:11:10,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:10,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 20:11:10,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:11:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:11:10,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:10,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:10,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:10,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:10,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:10,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:10,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:10,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:10,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:10,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:10,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:10,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:10,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366200126] [2020-10-27 20:11:10,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:10,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:11:10,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319455006] [2020-10-27 20:11:10,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:11:10,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:11:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:11:10,514 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-10-27 20:11:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:10,594 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 20:11:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:11:10,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 20:11:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:10,595 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:11:10,595 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:11:10,596 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 [2020-10-27 20:11:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:11:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 20:11:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:11:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 20:11:10,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-27 20:11:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:10,602 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 20:11:10,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:11:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 20:11:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:11:10,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:10,603 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:10,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:11:10,604 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash -976149849, now seen corresponding path program 8 times [2020-10-27 20:11:10,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:10,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425282326] [2020-10-27 20:11:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:10,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:10,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:11:10,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:10,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 20:11:10,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:10,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:11:10,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:10,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:11:10,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:10,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:10,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:10,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:10,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:10,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:10,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:10,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:10,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425282326] [2020-10-27 20:11:10,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:10,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:11:10,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379165791] [2020-10-27 20:11:10,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:11:10,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:11:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:11:10,984 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 12 states. [2020-10-27 20:11:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:11,076 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 20:11:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:11:11,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 20:11:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:11,077 INFO L225 Difference]: With dead ends: 40 [2020-10-27 20:11:11,078 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:11:11,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:11:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:11:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:11:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:11:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 20:11:11,084 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-27 20:11:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:11,084 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 20:11:11,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:11:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 20:11:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:11:11,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:11,085 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:11,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:11:11,086 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2070057243, now seen corresponding path program 9 times [2020-10-27 20:11:11,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:11,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140406063] [2020-10-27 20:11:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:11,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:11,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:11:11,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:11,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 20:11:11,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:11,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:11:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:11:11,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:11,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:11,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:11,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:11,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:11,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:11,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:11,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140406063] [2020-10-27 20:11:11,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:11,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:11:11,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592520163] [2020-10-27 20:11:11,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:11:11,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:11:11,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:11,484 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-10-27 20:11:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:11,567 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 20:11:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:11:11,567 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 20:11:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:11,568 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:11:11,568 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 20:11:11,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:11:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 20:11:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 20:11:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:11:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 20:11:11,574 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-27 20:11:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:11,574 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 20:11:11,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:11:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 20:11:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:11:11,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:11,576 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:11,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:11:11,576 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1048075357, now seen corresponding path program 10 times [2020-10-27 20:11:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:11,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452715071] [2020-10-27 20:11:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:11,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:11,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:11,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:11:11,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:11,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 20:11:11,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:11:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:11,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:11:11,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:11,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:11,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:11,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:11,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:11,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:11,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:11,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:11,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:11,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:11,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452715071] [2020-10-27 20:11:11,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:11,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:11:11,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278983923] [2020-10-27 20:11:11,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:11:11,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:11,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:11:11,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:11:11,998 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 14 states. [2020-10-27 20:11:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:12,106 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 20:11:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:11:12,106 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 20:11:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:12,107 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:11:12,107 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:11:12,108 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 [2020-10-27 20:11:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:11:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 20:11:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:11:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 20:11:12,116 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-27 20:11:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:12,118 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 20:11:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:11:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 20:11:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:11:12,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:12,120 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:12,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:11:12,121 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:12,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1823973601, now seen corresponding path program 11 times [2020-10-27 20:11:12,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:12,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002032550] [2020-10-27 20:11:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:12,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:12,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:12,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:11:12,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 20:11:12,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:11:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:12,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:11:12,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:12,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:12,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:12,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:12,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:12,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:12,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:12,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:12,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:12,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:12,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002032550] [2020-10-27 20:11:12,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:12,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:11:12,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690100824] [2020-10-27 20:11:12,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:11:12,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:11:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:11:12,662 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-10-27 20:11:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:12,776 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 20:11:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:11:12,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 20:11:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:12,778 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:11:12,778 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:11:12,778 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 [2020-10-27 20:11:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:11:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 20:11:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 20:11:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 20:11:12,787 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-27 20:11:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:12,787 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 20:11:12,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:11:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 20:11:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:11:12,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:12,789 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:12,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:11:12,790 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:12,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash 199050911, now seen corresponding path program 12 times [2020-10-27 20:11:12,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:12,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461909573] [2020-10-27 20:11:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:13,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:13,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 20:11:13,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:13,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 20:11:13,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:13,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:11:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:13,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:11:13,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:13,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:13,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:13,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:13,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:13,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:13,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:13,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:13,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:13,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:13,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:13,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461909573] [2020-10-27 20:11:13,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:13,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:11:13,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793492601] [2020-10-27 20:11:13,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:11:13,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:13,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:11:13,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:11:13,404 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 16 states. [2020-10-27 20:11:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:13,520 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 20:11:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:11:13,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 20:11:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:13,522 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:11:13,522 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:11:13,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:11:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:11:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 20:11:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:11:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 20:11:13,540 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-27 20:11:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:13,541 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 20:11:13,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:11:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 20:11:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:11:13,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:13,545 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:13,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:11:13,546 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:13,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2016441565, now seen corresponding path program 13 times [2020-10-27 20:11:13,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:13,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146058081] [2020-10-27 20:11:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:13,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:13,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:13,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:11:13,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:13,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 20:11:13,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:11:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:11:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:14,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:14,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:14,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:14,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:14,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:14,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:14,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:14,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:14,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146058081] [2020-10-27 20:11:14,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:14,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:11:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653473951] [2020-10-27 20:11:14,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:11:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:11:14,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:11:14,196 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-10-27 20:11:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:14,335 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 20:11:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:11:14,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-27 20:11:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:14,337 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:11:14,337 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:11:14,338 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 [2020-10-27 20:11:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:11:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 20:11:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 20:11:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 20:11:14,353 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-27 20:11:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:14,353 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 20:11:14,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:11:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 20:11:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:11:14,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:14,354 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:14,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:11:14,354 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 477170587, now seen corresponding path program 14 times [2020-10-27 20:11:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:14,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626280893] [2020-10-27 20:11:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:14,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:14,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:14,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:11:14,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:14,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 20:11:14,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:11:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:11:14,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:15,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:15,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:15,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:15,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:15,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:15,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:11:15,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:15,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:15,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 20 [2020-10-27 20:11:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:15,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626280893] [2020-10-27 20:11:15,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:15,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:11:15,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376597618] [2020-10-27 20:11:15,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:11:15,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:11:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:11:15,138 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-10-27 20:11:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:15,288 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 20:11:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:11:15,290 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-27 20:11:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:15,291 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:11:15,291 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:11:15,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:11:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:11:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 20:11:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:11:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 20:11:15,300 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-27 20:11:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:15,301 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 20:11:15,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:11:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 20:11:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:11:15,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:15,304 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:15,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:11:15,304 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1293489447, now seen corresponding path program 15 times [2020-10-27 20:11:15,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:15,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214745888] [2020-10-27 20:11:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:15,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:15,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:15,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:11:15,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:15,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 20:11:15,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:11:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:11:15,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:15,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:15,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:15,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:15,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:15,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:15,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:15,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:15,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:15,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:15,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214745888] [2020-10-27 20:11:15,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:15,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:11:15,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116583688] [2020-10-27 20:11:15,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:11:15,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:15,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:11:15,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:11:15,994 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-10-27 20:11:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:16,130 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 20:11:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:11:16,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-27 20:11:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:16,131 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:11:16,131 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:11:16,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:11:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:11:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:11:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:11:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 20:11:16,144 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-27 20:11:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:16,144 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 20:11:16,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:11:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 20:11:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:11:16,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:16,145 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:16,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:11:16,145 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:16,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2090732905, now seen corresponding path program 16 times [2020-10-27 20:11:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:16,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225223240] [2020-10-27 20:11:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:16,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:16,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:16,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:11:16,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:16,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-27 20:11:16,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:16,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:11:16,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:16,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 20:11:16,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:16,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:16,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:16,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:16,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:16,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:16,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:16,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:16,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:16,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225223240] [2020-10-27 20:11:16,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:16,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:11:16,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75820061] [2020-10-27 20:11:16,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:11:16,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:11:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:11:16,979 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 20 states. [2020-10-27 20:11:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:17,128 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 20:11:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:11:17,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-27 20:11:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:17,131 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:11:17,131 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:11:17,132 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 [2020-10-27 20:11:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:11:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 20:11:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:11:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 20:11:17,141 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-27 20:11:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:17,142 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 20:11:17,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:11:17,142 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 20:11:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:11:17,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:17,143 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:17,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:11:17,144 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash 557449941, now seen corresponding path program 17 times [2020-10-27 20:11:17,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:17,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017235347] [2020-10-27 20:11:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:17,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:17,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:17,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:11:17,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:17,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-27 20:11:17,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:17,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:11:17,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:17,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:11:17,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:17,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:17,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:17,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:17,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:17,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:17,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:17,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:17,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:17,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017235347] [2020-10-27 20:11:17,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:17,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:11:17,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17579094] [2020-10-27 20:11:18,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:11:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:11:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:11:18,002 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-10-27 20:11:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:18,167 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 20:11:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:11:18,168 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-27 20:11:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:18,169 INFO L225 Difference]: With dead ends: 58 [2020-10-27 20:11:18,169 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:11:18,169 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 [2020-10-27 20:11:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:11:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 20:11:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 20:11:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 20:11:18,178 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-27 20:11:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:18,180 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 20:11:18,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:11:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 20:11:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 20:11:18,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:18,180 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:18,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:11:18,181 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1454441581, now seen corresponding path program 18 times [2020-10-27 20:11:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:18,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508986113] [2020-10-27 20:11:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:18,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:18,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 20:11:18,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:18,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-27 20:11:18,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:11:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 20:11:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:19,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:19,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:19,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:19,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:19,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:19,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:19,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:19,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:19,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508986113] [2020-10-27 20:11:19,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:19,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:11:19,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428709053] [2020-10-27 20:11:19,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:11:19,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:19,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:11:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:11:19,154 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 22 states. [2020-10-27 20:11:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:19,315 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 20:11:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:11:19,315 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-27 20:11:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:19,316 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:11:19,316 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:11:19,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:11:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:11:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 20:11:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:11:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 20:11:19,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-27 20:11:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:19,321 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 20:11:19,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:11:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 20:11:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:11:19,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:19,322 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:19,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:11:19,322 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2146911023, now seen corresponding path program 19 times [2020-10-27 20:11:19,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:19,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124607418] [2020-10-27 20:11:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:19,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:19,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:19,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 20:11:19,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:19,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-27 20:11:19,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:11:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:11:19,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:20,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:20,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:20,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:20,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:20,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:20,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:20,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:20,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:20,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:20,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124607418] [2020-10-27 20:11:20,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:20,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:11:20,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944195389] [2020-10-27 20:11:20,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:11:20,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:20,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:11:20,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:11:20,275 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-10-27 20:11:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:20,455 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 20:11:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:11:20,455 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-27 20:11:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:20,456 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:11:20,456 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:11:20,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:11:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:11:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 20:11:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:11:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 20:11:20,462 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-27 20:11:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:20,462 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 20:11:20,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:11:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 20:11:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 20:11:20,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:20,463 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:20,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:11:20,464 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1890113905, now seen corresponding path program 20 times [2020-10-27 20:11:20,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:20,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234332179] [2020-10-27 20:11:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:20,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:21,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:21,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:11:21,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-27 20:11:21,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:21,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:11:21,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:21,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 20:11:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:21,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:21,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:21,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:21,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:21,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:21,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:21,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:21,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234332179] [2020-10-27 20:11:21,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:21,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:11:21,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307813449] [2020-10-27 20:11:21,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:11:21,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:11:21,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:11:21,472 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 24 states. [2020-10-27 20:11:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:21,608 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 20:11:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:11:21,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-27 20:11:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:21,610 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:11:21,610 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:11:21,611 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 [2020-10-27 20:11:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:11:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 20:11:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:11:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 20:11:21,615 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-27 20:11:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:21,615 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 20:11:21,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:11:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 20:11:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 20:11:21,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:21,616 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:21,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:11:21,616 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash 78780621, now seen corresponding path program 21 times [2020-10-27 20:11:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:21,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131410088] [2020-10-27 20:11:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:22,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:22,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 20:11:22,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:22,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-27 20:11:22,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:22,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:11:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:11:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:22,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:22,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:22,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:22,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:22,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:22,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:22,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:22,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:22,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:22,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:22,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:22,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131410088] [2020-10-27 20:11:22,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:22,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:11:22,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748428507] [2020-10-27 20:11:22,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:11:22,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:22,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:11:22,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:11:22,722 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-10-27 20:11:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:22,967 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 20:11:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:11:22,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-27 20:11:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:22,969 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:11:22,969 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:11:22,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:11:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:11:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 20:11:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:11:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 20:11:22,974 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-27 20:11:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:22,974 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 20:11:22,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:11:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 20:11:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:11:22,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:22,975 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:22,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:11:22,975 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1894157429, now seen corresponding path program 22 times [2020-10-27 20:11:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:22,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911713157] [2020-10-27 20:11:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:23,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:23,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:23,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:11:23,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:23,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 717 [2020-10-27 20:11:23,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:11:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:11:23,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:24,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:24,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:24,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:24,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:24,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:11:24,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:24,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:24,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:24,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:24,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:24,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911713157] [2020-10-27 20:11:24,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:24,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:11:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978925785] [2020-10-27 20:11:24,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:11:24,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:24,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:11:24,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:11:24,232 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 26 states. [2020-10-27 20:11:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:24,431 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 20:11:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:11:24,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-27 20:11:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:24,433 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:11:24,433 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:11:24,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:11:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:11:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 20:11:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:11:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 20:11:24,438 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-27 20:11:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:24,438 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 20:11:24,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:11:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 20:11:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:11:24,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:24,439 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:24,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:11:24,439 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 487921353, now seen corresponding path program 23 times [2020-10-27 20:11:24,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:24,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468092127] [2020-10-27 20:11:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:24,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:25,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:25,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 20:11:25,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:25,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-27 20:11:25,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:25,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:11:25,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:25,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:11:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:25,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:25,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:25,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:25,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:25,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:25,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:25,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:25,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:25,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468092127] [2020-10-27 20:11:25,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:25,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:11:25,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600441095] [2020-10-27 20:11:25,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:11:25,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:11:25,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:11:25,690 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-10-27 20:11:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:25,912 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 20:11:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:11:25,913 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-27 20:11:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:25,914 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:11:25,914 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 20:11:25,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:11:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 20:11:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 20:11:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:11:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 20:11:25,919 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-27 20:11:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:25,920 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 20:11:25,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:11:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 20:11:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 20:11:25,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:25,921 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:25,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:11:25,921 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:25,921 INFO L82 PathProgramCache]: Analyzing trace with hash 448062087, now seen corresponding path program 24 times [2020-10-27 20:11:25,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:25,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403706548] [2020-10-27 20:11:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:26,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:11:26,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:27,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:27,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:27,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403706548] [2020-10-27 20:11:27,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:27,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:11:27,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404773019] [2020-10-27 20:11:27,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:11:27,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:27,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:11:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:11:27,357 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 28 states. [2020-10-27 20:11:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:27,569 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-27 20:11:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:11:27,570 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-27 20:11:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:27,570 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:11:27,571 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:11:27,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:11:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:11:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 20:11:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:11:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-27 20:11:27,576 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-27 20:11:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:27,576 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-27 20:11:27,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:11:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-27 20:11:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:11:27,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:27,577 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:27,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:11:27,577 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash 798013125, now seen corresponding path program 25 times [2020-10-27 20:11:27,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:27,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431243156] [2020-10-27 20:11:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:28,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:28,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:11:28,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:28,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-27 20:11:28,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:28,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:11:28,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:28,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 20:11:28,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:29,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:29,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:29,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:29,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:11:29,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:29,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:29,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:29,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431243156] [2020-10-27 20:11:29,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:29,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:11:29,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630078402] [2020-10-27 20:11:29,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:11:29,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:11:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:11:29,030 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-10-27 20:11:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:29,249 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-27 20:11:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:11:29,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-27 20:11:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:29,250 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:11:29,250 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:11:29,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:11:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:11:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 20:11:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:11:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-27 20:11:29,264 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-27 20:11:29,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:29,265 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-27 20:11:29,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:11:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-27 20:11:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:11:29,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:29,265 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:29,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:11:29,266 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:29,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:29,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2093511555, now seen corresponding path program 26 times [2020-10-27 20:11:29,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:29,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628528196] [2020-10-27 20:11:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:29,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:30,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:30,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 20:11:30,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:30,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-27 20:11:30,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:30,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:11:30,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:30,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 20:11:30,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:30,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:30,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:30,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:30,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:30,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:30,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:30,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628528196] [2020-10-27 20:11:30,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:30,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:11:30,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928944650] [2020-10-27 20:11:30,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:11:30,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:11:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:11:30,660 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 30 states. [2020-10-27 20:11:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:30,923 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-27 20:11:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:11:30,929 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-27 20:11:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:30,929 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:11:30,929 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:11:30,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:11:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:11:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-27 20:11:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 20:11:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-27 20:11:30,940 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-27 20:11:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:30,941 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-27 20:11:30,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:11:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-27 20:11:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:11:30,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:30,942 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:30,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:11:30,943 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1526986945, now seen corresponding path program 27 times [2020-10-27 20:11:30,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:30,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444445777] [2020-10-27 20:11:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:31,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:11:31,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:32,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:32,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:32,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:32,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:32,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:32,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:32,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:32,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444445777] [2020-10-27 20:11:32,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:32,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:11:32,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634959323] [2020-10-27 20:11:32,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:11:32,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:32,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:11:32,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:11:32,507 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-10-27 20:11:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:32,762 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-27 20:11:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:11:32,762 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-27 20:11:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:32,763 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:11:32,763 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:11:32,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:11:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:11:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 20:11:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:11:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-27 20:11:32,768 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-27 20:11:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:32,769 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-27 20:11:32,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:11:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-27 20:11:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 20:11:32,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:32,770 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:32,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:11:32,770 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1737283969, now seen corresponding path program 28 times [2020-10-27 20:11:32,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:32,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395225075] [2020-10-27 20:11:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:32,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:33,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:33,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 20:11:33,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:33,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-27 20:11:33,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:33,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:11:33,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:33,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 20:11:33,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:34,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:34,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:34,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:34,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:34,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:34,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:34,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:34,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:34,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:34,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395225075] [2020-10-27 20:11:34,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:34,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:11:34,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052322034] [2020-10-27 20:11:34,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:11:34,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:11:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:11:34,431 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 32 states. [2020-10-27 20:11:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:34,704 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-27 20:11:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:11:34,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-27 20:11:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:34,706 INFO L225 Difference]: With dead ends: 80 [2020-10-27 20:11:34,706 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:11:34,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:11:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:11:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 20:11:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:11:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-27 20:11:34,712 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-27 20:11:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:34,712 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-27 20:11:34,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:11:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-27 20:11:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 20:11:34,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:34,713 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:34,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:11:34,714 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash 919461053, now seen corresponding path program 29 times [2020-10-27 20:11:34,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:34,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355034027] [2020-10-27 20:11:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:35,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 20:11:35,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:36,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:36,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:36,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:36,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:36,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:36,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:36,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:36,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355034027] [2020-10-27 20:11:36,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:36,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:11:36,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918743851] [2020-10-27 20:11:36,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:11:36,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:11:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:11:36,455 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-10-27 20:11:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:36,718 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-27 20:11:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:11:36,719 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-27 20:11:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:36,719 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:11:36,720 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 20:11:36,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:11:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 20:11:36,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 20:11:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 20:11:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-27 20:11:36,725 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-27 20:11:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:36,725 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-27 20:11:36,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:11:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-27 20:11:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 20:11:36,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:36,726 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:36,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:11:36,727 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:36,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1454113925, now seen corresponding path program 30 times [2020-10-27 20:11:36,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:36,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846679920] [2020-10-27 20:11:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:36,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:37,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:37,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 20:11:37,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:37,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-27 20:11:37,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:11:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:11:37,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:38,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:38,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:38,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:38,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:38,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:11:38,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:38,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:38,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846679920] [2020-10-27 20:11:38,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:38,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:11:38,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129281482] [2020-10-27 20:11:38,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:11:38,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:11:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:11:38,520 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 34 states. [2020-10-27 20:11:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:38,711 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-27 20:11:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:11:38,711 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-27 20:11:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:38,712 INFO L225 Difference]: With dead ends: 84 [2020-10-27 20:11:38,712 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:11:38,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:11:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:11:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 20:11:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:11:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-27 20:11:38,721 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-27 20:11:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:38,722 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-27 20:11:38,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:11:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-27 20:11:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:11:38,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:38,725 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:38,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:11:38,725 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1832033607, now seen corresponding path program 31 times [2020-10-27 20:11:38,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:38,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908391398] [2020-10-27 20:11:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:38,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:39,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:39,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 20:11:39,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:39,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-27 20:11:39,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:11:39,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:39,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:11:39,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:40,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:40,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:40,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:40,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:40,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:40,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:40,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:40,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:40,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908391398] [2020-10-27 20:11:40,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:40,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:11:40,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840549242] [2020-10-27 20:11:40,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:11:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:11:40,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:11:40,636 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-10-27 20:11:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:40,918 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-27 20:11:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:11:40,919 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-10-27 20:11:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:40,920 INFO L225 Difference]: With dead ends: 86 [2020-10-27 20:11:40,920 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 20:11:40,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:11:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 20:11:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 20:11:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:11:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-27 20:11:40,929 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-27 20:11:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:40,930 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-27 20:11:40,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:11:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-27 20:11:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 20:11:40,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:40,932 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:40,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:11:40,933 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:40,933 INFO L82 PathProgramCache]: Analyzing trace with hash 59372151, now seen corresponding path program 32 times [2020-10-27 20:11:40,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:40,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539770081] [2020-10-27 20:11:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:40,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:41,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:41,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 20:11:41,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:41,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-27 20:11:41,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:41,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:11:41,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:41,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 20:11:41,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:42,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:42,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:42,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:42,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:42,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:42,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:42,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:42,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:42,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:42,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:42,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:42,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539770081] [2020-10-27 20:11:42,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:42,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:11:42,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330272735] [2020-10-27 20:11:42,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:11:42,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:11:42,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:11:42,780 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 36 states. [2020-10-27 20:11:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:42,976 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-27 20:11:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:11:42,977 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 77 [2020-10-27 20:11:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:42,978 INFO L225 Difference]: With dead ends: 88 [2020-10-27 20:11:42,978 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:11:42,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:11:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:11:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 20:11:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 20:11:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-27 20:11:42,984 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-27 20:11:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:42,984 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-27 20:11:42,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:11:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-27 20:11:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 20:11:42,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:42,985 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:42,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:11:42,985 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:42,986 INFO L82 PathProgramCache]: Analyzing trace with hash 929139381, now seen corresponding path program 33 times [2020-10-27 20:11:42,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:42,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637323567] [2020-10-27 20:11:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:43,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:43,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 20:11:43,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:43,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-27 20:11:43,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:11:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 20:11:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:44,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:44,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:44,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:44,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:44,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:44,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:44,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:44,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:44,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:44,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637323567] [2020-10-27 20:11:44,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:44,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:11:44,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856836051] [2020-10-27 20:11:44,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:11:44,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:44,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:11:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:11:44,720 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-10-27 20:11:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:45,057 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-27 20:11:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:11:45,057 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-10-27 20:11:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:45,058 INFO L225 Difference]: With dead ends: 90 [2020-10-27 20:11:45,058 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 20:11:45,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:11:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 20:11:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 20:11:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:11:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-27 20:11:45,068 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-27 20:11:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:45,068 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-27 20:11:45,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:11:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-27 20:11:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:11:45,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:45,072 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:45,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:11:45,072 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:45,073 INFO L82 PathProgramCache]: Analyzing trace with hash -743175309, now seen corresponding path program 34 times [2020-10-27 20:11:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:45,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035698554] [2020-10-27 20:11:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:45,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:45,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:11:45,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:45,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-27 20:11:45,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:11:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 20:11:45,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:46,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:46,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:46,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:46,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035698554] [2020-10-27 20:11:46,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:46,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:11:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055279552] [2020-10-27 20:11:46,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:11:46,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:11:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:11:46,940 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 38 states. [2020-10-27 20:11:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:47,244 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-27 20:11:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:11:47,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 81 [2020-10-27 20:11:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:47,246 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:11:47,246 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:11:47,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:11:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:11:47,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 20:11:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 20:11:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-27 20:11:47,252 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-27 20:11:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:47,252 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-27 20:11:47,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:11:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-27 20:11:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 20:11:47,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:47,253 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:47,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:11:47,254 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1519823695, now seen corresponding path program 35 times [2020-10-27 20:11:47,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:47,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482490009] [2020-10-27 20:11:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 20:11:48,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:49,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:49,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:49,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:49,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:49,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:49,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:49,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:49,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:49,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:49,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:49,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:49,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482490009] [2020-10-27 20:11:49,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:49,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:11:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951657531] [2020-10-27 20:11:49,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:11:49,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:11:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:11:49,195 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-10-27 20:11:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:49,442 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-27 20:11:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:11:49,443 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-10-27 20:11:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:49,444 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:11:49,444 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 20:11:49,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:11:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 20:11:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 20:11:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:11:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-27 20:11:49,451 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-27 20:11:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:49,452 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-27 20:11:49,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:11:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-27 20:11:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 20:11:49,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:49,453 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:49,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:11:49,453 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash -554613137, now seen corresponding path program 36 times [2020-10-27 20:11:49,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:49,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057676136] [2020-10-27 20:11:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:49,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:50,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:50,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 20:11:50,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:50,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-27 20:11:50,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:50,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:11:50,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:50,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 20:11:50,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:51,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:51,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:51,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:51,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057676136] [2020-10-27 20:11:51,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:51,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:11:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077621913] [2020-10-27 20:11:51,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:11:51,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:11:51,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:11:51,464 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 40 states. [2020-10-27 20:11:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:51,719 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-27 20:11:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:11:51,719 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 85 [2020-10-27 20:11:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:51,721 INFO L225 Difference]: With dead ends: 96 [2020-10-27 20:11:51,721 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:11:51,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:11:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:11:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 20:11:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 20:11:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-27 20:11:51,728 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-27 20:11:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:51,728 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-27 20:11:51,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:11:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-27 20:11:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 20:11:51,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:51,729 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:51,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:11:51,730 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash -700202835, now seen corresponding path program 37 times [2020-10-27 20:11:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:51,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066341592] [2020-10-27 20:11:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:52,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:52,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 20:11:52,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:52,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 925 [2020-10-27 20:11:52,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:52,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:11:52,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 20:11:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:53,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:53,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:53,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:53,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:53,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:53,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:11:53,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:53,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:53,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:53,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066341592] [2020-10-27 20:11:53,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:53,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:11:53,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844343945] [2020-10-27 20:11:53,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:11:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:11:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:11:53,887 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-10-27 20:11:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:54,162 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-27 20:11:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:11:54,162 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-10-27 20:11:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:54,164 INFO L225 Difference]: With dead ends: 98 [2020-10-27 20:11:54,164 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:11:54,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:11:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:11:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 20:11:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 20:11:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-10-27 20:11:54,173 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2020-10-27 20:11:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:54,173 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-10-27 20:11:54,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:11:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-10-27 20:11:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 20:11:54,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:54,174 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:54,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:11:54,175 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:54,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1122018155, now seen corresponding path program 38 times [2020-10-27 20:11:54,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:54,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12506036] [2020-10-27 20:11:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:55,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:55,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:11:55,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:55,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1119 [2020-10-27 20:11:55,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:55,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:11:55,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:55,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 20:11:55,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:56,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:56,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:56,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12506036] [2020-10-27 20:11:56,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:56,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:11:56,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089785135] [2020-10-27 20:11:56,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:11:56,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:56,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:11:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:11:56,569 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 42 states. [2020-10-27 20:11:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:56,877 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-27 20:11:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:11:56,877 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 89 [2020-10-27 20:11:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:56,879 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:11:56,879 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:11:56,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:11:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:11:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-27 20:11:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 20:11:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-27 20:11:56,886 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2020-10-27 20:11:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:56,886 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-27 20:11:56,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:11:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-27 20:11:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 20:11:56,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:56,888 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:56,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:11:56,888 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash -70267223, now seen corresponding path program 39 times [2020-10-27 20:11:56,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:56,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358606546] [2020-10-27 20:11:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:57,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 20:11:57,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:11:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:11:59,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:11:59,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:11:59,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:11:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:11:59,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:11:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:11:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:11:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:11:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:11:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:11:59,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358606546] [2020-10-27 20:11:59,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:11:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:11:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892582949] [2020-10-27 20:11:59,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:11:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:11:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:11:59,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:11:59,232 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-10-27 20:11:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:11:59,596 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-27 20:11:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:11:59,597 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-10-27 20:11:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:11:59,601 INFO L225 Difference]: With dead ends: 102 [2020-10-27 20:11:59,601 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 20:11:59,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:11:59,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 20:11:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 20:11:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:11:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-27 20:11:59,608 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-27 20:11:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:11:59,608 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-27 20:11:59,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:11:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-27 20:11:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 20:11:59,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:11:59,610 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:11:59,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:11:59,610 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:11:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:11:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash 899752551, now seen corresponding path program 40 times [2020-10-27 20:11:59,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:11:59,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669145491] [2020-10-27 20:11:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:11:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:11:59,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:00,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:00,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 20:12:00,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:00,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-27 20:12:00,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:12:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:00,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 20:12:00,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:01,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:01,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:01,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:01,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:01,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:01,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:01,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:01,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:01,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:01,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:01,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:01,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669145491] [2020-10-27 20:12:01,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:01,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:12:01,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267577543] [2020-10-27 20:12:01,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:12:01,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:12:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:12:01,995 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 44 states. [2020-10-27 20:12:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:02,251 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-27 20:12:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:12:02,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 93 [2020-10-27 20:12:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:02,253 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:12:02,253 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:12:02,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:12:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:12:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 20:12:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 20:12:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-27 20:12:02,260 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-27 20:12:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:02,261 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-27 20:12:02,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:12:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-27 20:12:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 20:12:02,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:02,262 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:02,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:12:02,262 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1080852133, now seen corresponding path program 41 times [2020-10-27 20:12:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:02,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864507496] [2020-10-27 20:12:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:02,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:03,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:03,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 20:12:03,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-27 20:12:03,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:03,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:12:03,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:03,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 20:12:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:04,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:04,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:04,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:04,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:04,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:04,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:04,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:04,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:04,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:04,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:04,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:04,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864507496] [2020-10-27 20:12:04,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:04,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:12:04,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069644378] [2020-10-27 20:12:04,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:12:04,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:12:04,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:12:04,732 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-10-27 20:12:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:05,092 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-27 20:12:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:12:05,093 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-10-27 20:12:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:05,095 INFO L225 Difference]: With dead ends: 106 [2020-10-27 20:12:05,096 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:12:05,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:12:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:12:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 20:12:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 20:12:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-27 20:12:05,102 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-27 20:12:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:05,102 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-27 20:12:05,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:12:05,103 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-27 20:12:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 20:12:05,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:05,107 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:05,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:12:05,107 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:05,108 INFO L82 PathProgramCache]: Analyzing trace with hash -976108701, now seen corresponding path program 42 times [2020-10-27 20:12:05,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:05,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258977880] [2020-10-27 20:12:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:05,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:06,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:06,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 20:12:06,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:06,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-27 20:12:06,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:12:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 20:12:06,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:07,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:07,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:07,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:07,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:07,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:07,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:12:07,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:07,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:07,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:07,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:07,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:07,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258977880] [2020-10-27 20:12:07,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:07,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:12:07,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465771303] [2020-10-27 20:12:07,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:12:07,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:07,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:12:07,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:12:07,842 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 46 states. [2020-10-27 20:12:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:08,118 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-27 20:12:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:12:08,119 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 97 [2020-10-27 20:12:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:08,120 INFO L225 Difference]: With dead ends: 108 [2020-10-27 20:12:08,121 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:12:08,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:12:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:12:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 20:12:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 20:12:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-27 20:12:08,126 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-27 20:12:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:08,126 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-27 20:12:08,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:12:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-27 20:12:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 20:12:08,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:08,128 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:08,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:12:08,128 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2030514015, now seen corresponding path program 43 times [2020-10-27 20:12:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:08,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087406132] [2020-10-27 20:12:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:08,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 20:12:09,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:10,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:10,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:10,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:10,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:10,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:10,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:10,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:10,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:10,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:10,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:10,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087406132] [2020-10-27 20:12:10,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:10,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:12:10,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15042696] [2020-10-27 20:12:10,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:12:10,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:10,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:12:10,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:12:10,807 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-10-27 20:12:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:11,206 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-27 20:12:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:12:11,207 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-10-27 20:12:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:11,208 INFO L225 Difference]: With dead ends: 110 [2020-10-27 20:12:11,208 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 20:12:11,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:12:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 20:12:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 20:12:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 20:12:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-10-27 20:12:11,214 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2020-10-27 20:12:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:11,214 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-10-27 20:12:11,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:12:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-10-27 20:12:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 20:12:11,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:11,215 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:11,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:12:11,215 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:11,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1701738913, now seen corresponding path program 44 times [2020-10-27 20:12:11,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:11,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156086434] [2020-10-27 20:12:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:11,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:12,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:12,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 20:12:12,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:12,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-27 20:12:12,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:12:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 20:12:12,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:13,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:13,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:13,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:13,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:13,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:13,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:13,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:13,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156086434] [2020-10-27 20:12:13,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:13,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:12:13,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949864627] [2020-10-27 20:12:13,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:12:13,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:13,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:12:13,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:12:13,946 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 48 states. [2020-10-27 20:12:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:14,354 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-27 20:12:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:12:14,355 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 101 [2020-10-27 20:12:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:14,356 INFO L225 Difference]: With dead ends: 112 [2020-10-27 20:12:14,357 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:12:14,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:12:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:12:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 20:12:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 20:12:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-27 20:12:14,362 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2020-10-27 20:12:14,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:14,362 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-27 20:12:14,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:12:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-27 20:12:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 20:12:14,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:14,363 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:14,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:12:14,363 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash 718521501, now seen corresponding path program 45 times [2020-10-27 20:12:14,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:14,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415074153] [2020-10-27 20:12:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:14,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 20:12:15,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:17,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:17,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415074153] [2020-10-27 20:12:17,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:17,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:12:17,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051596035] [2020-10-27 20:12:17,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:12:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:12:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:12:17,247 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 49 states. [2020-10-27 20:12:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:17,652 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-27 20:12:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:12:17,653 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 103 [2020-10-27 20:12:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:17,654 INFO L225 Difference]: With dead ends: 114 [2020-10-27 20:12:17,654 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 20:12:17,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:12:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 20:12:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 20:12:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 20:12:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-27 20:12:17,659 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2020-10-27 20:12:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:17,659 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-27 20:12:17,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:12:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-27 20:12:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 20:12:17,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:17,660 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:17,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:12:17,660 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:17,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1283495077, now seen corresponding path program 46 times [2020-10-27 20:12:17,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:17,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948757732] [2020-10-27 20:12:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:17,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:18,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:18,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 20:12:18,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:18,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1156 [2020-10-27 20:12:18,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:12:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:18,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 20:12:18,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:20,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:20,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:20,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:20,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:20,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:12:20,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:20,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948757732] [2020-10-27 20:12:20,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:20,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:12:20,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906203872] [2020-10-27 20:12:20,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:12:20,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:20,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:12:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:12:20,642 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 50 states. [2020-10-27 20:12:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:21,062 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 20:12:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:12:21,062 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 105 [2020-10-27 20:12:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:21,064 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:12:21,064 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:12:21,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:12:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:12:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 20:12:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 20:12:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-27 20:12:21,076 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2020-10-27 20:12:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:21,076 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-27 20:12:21,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:12:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-27 20:12:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:12:21,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:21,077 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:21,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:12:21,077 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1076077927, now seen corresponding path program 47 times [2020-10-27 20:12:21,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:21,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938072095] [2020-10-27 20:12:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:21,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:22,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:22,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 20:12:22,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:22,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-27 20:12:22,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:22,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:12:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 20:12:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:24,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:24,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:24,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:24,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:24,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:24,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:24,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938072095] [2020-10-27 20:12:24,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:24,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:12:24,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050583206] [2020-10-27 20:12:24,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:12:24,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:12:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:12:24,385 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 51 states. [2020-10-27 20:12:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:24,810 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-27 20:12:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:12:24,811 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 107 [2020-10-27 20:12:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:24,812 INFO L225 Difference]: With dead ends: 118 [2020-10-27 20:12:24,812 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 20:12:24,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:12:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 20:12:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 20:12:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:12:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-10-27 20:12:24,821 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2020-10-27 20:12:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:24,821 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-10-27 20:12:24,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:12:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-10-27 20:12:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 20:12:24,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:24,822 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:24,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:12:24,823 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 683307607, now seen corresponding path program 48 times [2020-10-27 20:12:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:24,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439563652] [2020-10-27 20:12:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:24,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:26,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:26,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 20:12:26,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:26,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-10-27 20:12:26,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:26,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:12:26,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:26,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 20:12:26,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:28,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:28,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:28,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:28,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439563652] [2020-10-27 20:12:28,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:28,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:12:28,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858448774] [2020-10-27 20:12:28,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:12:28,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:12:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:12:28,062 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 52 states. [2020-10-27 20:12:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:28,495 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-27 20:12:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:12:28,495 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 109 [2020-10-27 20:12:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:28,497 INFO L225 Difference]: With dead ends: 120 [2020-10-27 20:12:28,497 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:12:28,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:12:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:12:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 20:12:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 20:12:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-10-27 20:12:28,502 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2020-10-27 20:12:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:28,502 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-10-27 20:12:28,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:12:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-10-27 20:12:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 20:12:28,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:28,503 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:28,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:12:28,503 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash -764308843, now seen corresponding path program 49 times [2020-10-27 20:12:28,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:28,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956047883] [2020-10-27 20:12:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:28,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1324 [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 20:12:29,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:31,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:31,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:31,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:31,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:31,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:31,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:31,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956047883] [2020-10-27 20:12:31,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:31,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:12:31,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320649842] [2020-10-27 20:12:31,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:12:31,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:31,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:12:31,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:12:31,895 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 53 states. [2020-10-27 20:12:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:32,326 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-27 20:12:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:12:32,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 111 [2020-10-27 20:12:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:32,328 INFO L225 Difference]: With dead ends: 122 [2020-10-27 20:12:32,328 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 20:12:32,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:12:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 20:12:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 20:12:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 20:12:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2020-10-27 20:12:32,333 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2020-10-27 20:12:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:32,334 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2020-10-27 20:12:32,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:12:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2020-10-27 20:12:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 20:12:32,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:32,335 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:32,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:12:32,335 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash -354313389, now seen corresponding path program 50 times [2020-10-27 20:12:32,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:32,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793644643] [2020-10-27 20:12:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:33,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 20:12:33,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:35,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:35,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:35,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:35,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:35,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:35,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:35,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:35,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:35,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793644643] [2020-10-27 20:12:35,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:35,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 20:12:35,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319439597] [2020-10-27 20:12:35,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 20:12:35,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:35,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 20:12:35,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:12:35,836 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 54 states. [2020-10-27 20:12:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:36,099 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-27 20:12:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 20:12:36,099 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 113 [2020-10-27 20:12:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:36,101 INFO L225 Difference]: With dead ends: 124 [2020-10-27 20:12:36,101 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:12:36,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:12:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:12:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 20:12:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 20:12:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-27 20:12:36,107 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2020-10-27 20:12:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:36,107 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-27 20:12:36,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 20:12:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-27 20:12:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 20:12:36,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:36,108 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:36,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:12:36,109 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1485673327, now seen corresponding path program 51 times [2020-10-27 20:12:36,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:36,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257926557] [2020-10-27 20:12:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:36,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:37,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:37,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 20:12:37,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:37,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1400 [2020-10-27 20:12:37,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:37,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 20:12:37,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:37,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 20:12:37,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:39,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:39,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:39,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:39,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:39,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257926557] [2020-10-27 20:12:39,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:39,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 20:12:39,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350682916] [2020-10-27 20:12:39,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 20:12:39,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 20:12:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:12:39,728 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 55 states. [2020-10-27 20:12:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:40,140 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-27 20:12:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:12:40,141 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 115 [2020-10-27 20:12:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:40,143 INFO L225 Difference]: With dead ends: 126 [2020-10-27 20:12:40,143 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 20:12:40,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:12:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 20:12:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 20:12:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 20:12:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-27 20:12:40,151 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2020-10-27 20:12:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:40,152 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-27 20:12:40,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 20:12:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-27 20:12:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 20:12:40,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:40,153 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:40,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:12:40,153 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2095847857, now seen corresponding path program 52 times [2020-10-27 20:12:40,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:40,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753588365] [2020-10-27 20:12:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:40,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:41,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:41,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 20:12:41,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-27 20:12:41,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:12:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 20:12:41,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:43,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:43,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:43,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:43,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753588365] [2020-10-27 20:12:43,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:43,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 20:12:43,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252683893] [2020-10-27 20:12:43,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 20:12:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 20:12:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:12:43,911 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 56 states. [2020-10-27 20:12:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:44,381 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-27 20:12:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 20:12:44,381 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 117 [2020-10-27 20:12:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:44,383 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:12:44,383 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:12:44,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:12:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:12:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 20:12:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 20:12:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-10-27 20:12:44,388 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2020-10-27 20:12:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:44,388 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-10-27 20:12:44,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 20:12:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-10-27 20:12:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 20:12:44,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:44,390 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:44,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:12:44,390 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:44,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash -63051635, now seen corresponding path program 53 times [2020-10-27 20:12:44,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:44,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520361256] [2020-10-27 20:12:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:44,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:46,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:46,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 20:12:46,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:46,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-10-27 20:12:46,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 20:12:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:46,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 20:12:46,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:48,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:48,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520361256] [2020-10-27 20:12:48,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:48,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 20:12:48,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10150936] [2020-10-27 20:12:48,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 20:12:48,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 20:12:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:12:48,567 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 57 states. [2020-10-27 20:12:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:48,875 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-27 20:12:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 20:12:48,875 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 119 [2020-10-27 20:12:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:48,877 INFO L225 Difference]: With dead ends: 130 [2020-10-27 20:12:48,878 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 20:12:48,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:12:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 20:12:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 20:12:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 20:12:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-10-27 20:12:48,884 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2020-10-27 20:12:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:48,884 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-10-27 20:12:48,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 20:12:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-10-27 20:12:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 20:12:48,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:48,885 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:48,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:12:48,885 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash -756001973, now seen corresponding path program 54 times [2020-10-27 20:12:48,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:48,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994206998] [2020-10-27 20:12:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:48,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:50,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:50,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 20:12:50,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1610 [2020-10-27 20:12:50,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 20:12:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:50,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 20:12:50,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:52,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:52,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:52,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:52,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:52,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:52,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:52,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:52,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:52,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:52,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:52,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:52,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994206998] [2020-10-27 20:12:52,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:52,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 20:12:52,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860206943] [2020-10-27 20:12:52,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 20:12:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 20:12:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:12:52,941 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 58 states. [2020-10-27 20:12:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:53,442 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-27 20:12:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 20:12:53,443 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 121 [2020-10-27 20:12:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:53,444 INFO L225 Difference]: With dead ends: 132 [2020-10-27 20:12:53,444 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:12:53,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 20:12:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:12:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 20:12:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 20:12:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-10-27 20:12:53,450 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2020-10-27 20:12:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:53,451 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-10-27 20:12:53,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 20:12:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-10-27 20:12:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 20:12:53,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:53,452 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:53,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 20:12:53,452 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash -961345911, now seen corresponding path program 55 times [2020-10-27 20:12:53,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:53,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608161799] [2020-10-27 20:12:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:53,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 20:12:55,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:57,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:12:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:57,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:57,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:57,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:12:57,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:57,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:12:57,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:57,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:12:57,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:12:57,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:12:57,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:12:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:12:57,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608161799] [2020-10-27 20:12:57,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:12:57,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 20:12:57,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351876791] [2020-10-27 20:12:57,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 20:12:57,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:12:57,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 20:12:57,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:12:57,720 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 59 states. [2020-10-27 20:12:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:12:58,015 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-27 20:12:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 20:12:58,015 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 123 [2020-10-27 20:12:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:12:58,017 INFO L225 Difference]: With dead ends: 134 [2020-10-27 20:12:58,017 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 20:12:58,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:12:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 20:12:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 20:12:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 20:12:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-10-27 20:12:58,024 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2020-10-27 20:12:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:12:58,024 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-10-27 20:12:58,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 20:12:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-10-27 20:12:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 20:12:58,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:12:58,025 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:12:58,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 20:12:58,025 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:12:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:12:58,026 INFO L82 PathProgramCache]: Analyzing trace with hash -728374713, now seen corresponding path program 56 times [2020-10-27 20:12:58,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:12:58,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811498408] [2020-10-27 20:12:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:12:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:12:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:12:59,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1729 [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 20:12:59,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:02,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:02,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:02,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:02,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:02,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:02,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:02,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:02,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:02,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811498408] [2020-10-27 20:13:02,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:02,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 20:13:02,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036572721] [2020-10-27 20:13:02,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 20:13:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:02,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 20:13:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 20:13:02,414 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 60 states. [2020-10-27 20:13:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:02,907 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-27 20:13:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 20:13:02,907 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 125 [2020-10-27 20:13:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:02,909 INFO L225 Difference]: With dead ends: 136 [2020-10-27 20:13:02,909 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:13:02,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 20:13:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:13:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-27 20:13:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 20:13:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-10-27 20:13:02,917 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2020-10-27 20:13:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:02,917 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-10-27 20:13:02,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 20:13:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-10-27 20:13:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 20:13:02,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:02,918 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:02,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 20:13:02,918 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:02,918 INFO L82 PathProgramCache]: Analyzing trace with hash -181352827, now seen corresponding path program 57 times [2020-10-27 20:13:02,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:02,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814013076] [2020-10-27 20:13:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:04,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1762 [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 20:13:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:07,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:07,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:07,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:07,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:07,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:07,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:07,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:07,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:07,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:07,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:07,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814013076] [2020-10-27 20:13:07,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:07,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 20:13:07,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20749079] [2020-10-27 20:13:07,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 20:13:07,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 20:13:07,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:13:07,466 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 61 states. [2020-10-27 20:13:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:07,873 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-27 20:13:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 20:13:07,874 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 127 [2020-10-27 20:13:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:07,876 INFO L225 Difference]: With dead ends: 138 [2020-10-27 20:13:07,876 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 20:13:07,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:13:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 20:13:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-27 20:13:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 20:13:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2020-10-27 20:13:07,882 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2020-10-27 20:13:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:07,882 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2020-10-27 20:13:07,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 20:13:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2020-10-27 20:13:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 20:13:07,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:07,884 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:07,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 20:13:07,884 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:07,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1520669507, now seen corresponding path program 58 times [2020-10-27 20:13:07,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:07,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606983410] [2020-10-27 20:13:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:07,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:09,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:09,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 20:13:09,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:09,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1910 [2020-10-27 20:13:09,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 20:13:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 20:13:09,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:12,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:12,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:12,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:12,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606983410] [2020-10-27 20:13:12,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:12,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 20:13:12,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829604001] [2020-10-27 20:13:12,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 20:13:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 20:13:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 20:13:12,641 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 62 states. [2020-10-27 20:13:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:13,181 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-27 20:13:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 20:13:13,182 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 129 [2020-10-27 20:13:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:13,184 INFO L225 Difference]: With dead ends: 140 [2020-10-27 20:13:13,184 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 20:13:13,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 20:13:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 20:13:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-27 20:13:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 20:13:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-10-27 20:13:13,190 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2020-10-27 20:13:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:13,191 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-10-27 20:13:13,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 20:13:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-10-27 20:13:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 20:13:13,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:13,192 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:13,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 20:13:13,192 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:13,193 INFO L82 PathProgramCache]: Analyzing trace with hash 781592705, now seen corresponding path program 59 times [2020-10-27 20:13:13,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:13,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943207916] [2020-10-27 20:13:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:13,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:15,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 20:13:15,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:17,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:17,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:17,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:17,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:17,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:17,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:17,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:17,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943207916] [2020-10-27 20:13:17,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:17,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 20:13:17,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734037335] [2020-10-27 20:13:17,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 20:13:17,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:17,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 20:13:17,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:13:17,958 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 63 states. [2020-10-27 20:13:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:18,482 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-27 20:13:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 20:13:18,482 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 131 [2020-10-27 20:13:18,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:18,484 INFO L225 Difference]: With dead ends: 142 [2020-10-27 20:13:18,484 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 20:13:18,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:13:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 20:13:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-27 20:13:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 20:13:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2020-10-27 20:13:18,489 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2020-10-27 20:13:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:18,490 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2020-10-27 20:13:18,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 20:13:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2020-10-27 20:13:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 20:13:18,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:18,491 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:18,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 20:13:18,491 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:18,491 INFO L82 PathProgramCache]: Analyzing trace with hash -801610177, now seen corresponding path program 60 times [2020-10-27 20:13:18,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:18,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45474220] [2020-10-27 20:13:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:18,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:20,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:20,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 20:13:20,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:20,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1991 [2020-10-27 20:13:20,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 20:13:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:20,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 20:13:20,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:23,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:23,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:23,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:23,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:23,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:23,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45474220] [2020-10-27 20:13:23,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:23,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 20:13:23,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491306244] [2020-10-27 20:13:23,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 20:13:23,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 20:13:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 20:13:23,519 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 64 states. [2020-10-27 20:13:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:24,045 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-27 20:13:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 20:13:24,046 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 133 [2020-10-27 20:13:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:24,047 INFO L225 Difference]: With dead ends: 144 [2020-10-27 20:13:24,047 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 20:13:24,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 20:13:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 20:13:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-27 20:13:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 20:13:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2020-10-27 20:13:24,054 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2020-10-27 20:13:24,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:24,054 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2020-10-27 20:13:24,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 20:13:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2020-10-27 20:13:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 20:13:24,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:24,055 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:24,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 20:13:24,055 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1841156995, now seen corresponding path program 61 times [2020-10-27 20:13:24,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:24,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139886796] [2020-10-27 20:13:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:24,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2057 [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:29,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:29,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:29,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:29,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:29,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:13:29,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:29,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:29,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139886796] [2020-10-27 20:13:29,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:29,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-27 20:13:29,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365755584] [2020-10-27 20:13:29,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-27 20:13:29,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:29,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-27 20:13:29,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:13:29,210 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 65 states. [2020-10-27 20:13:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:29,654 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-10-27 20:13:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-27 20:13:29,655 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 135 [2020-10-27 20:13:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:29,656 INFO L225 Difference]: With dead ends: 146 [2020-10-27 20:13:29,656 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 20:13:29,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:13:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 20:13:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-27 20:13:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 20:13:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2020-10-27 20:13:29,661 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2020-10-27 20:13:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:29,662 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2020-10-27 20:13:29,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-27 20:13:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2020-10-27 20:13:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 20:13:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:29,663 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:29,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 20:13:29,663 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash -118269125, now seen corresponding path program 62 times [2020-10-27 20:13:29,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:29,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165612633] [2020-10-27 20:13:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:29,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:31,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:31,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 20:13:31,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:31,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2047 [2020-10-27 20:13:31,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-27 20:13:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 20:13:31,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:34,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:34,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:34,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:34,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:34,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:34,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:34,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:34,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165612633] [2020-10-27 20:13:34,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:34,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-27 20:13:34,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092408401] [2020-10-27 20:13:34,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-27 20:13:34,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:34,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-27 20:13:34,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 20:13:34,949 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 66 states. [2020-10-27 20:13:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:35,365 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-27 20:13:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-27 20:13:35,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 137 [2020-10-27 20:13:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:35,367 INFO L225 Difference]: With dead ends: 148 [2020-10-27 20:13:35,367 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 20:13:35,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 20:13:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 20:13:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-27 20:13:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 20:13:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2020-10-27 20:13:35,380 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2020-10-27 20:13:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:35,380 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2020-10-27 20:13:35,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-27 20:13:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2020-10-27 20:13:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 20:13:35,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:35,383 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:35,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 20:13:35,383 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2014564985, now seen corresponding path program 63 times [2020-10-27 20:13:35,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:35,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447729991] [2020-10-27 20:13:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:35,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2470 [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 20:13:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:41,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:41,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:41,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447729991] [2020-10-27 20:13:41,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:41,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-27 20:13:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844947641] [2020-10-27 20:13:41,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-27 20:13:41,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-27 20:13:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:13:41,180 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 67 states. [2020-10-27 20:13:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:41,578 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-10-27 20:13:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 20:13:41,579 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 139 [2020-10-27 20:13:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:41,581 INFO L225 Difference]: With dead ends: 150 [2020-10-27 20:13:41,581 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 20:13:41,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:13:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 20:13:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-27 20:13:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 20:13:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-10-27 20:13:41,587 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2020-10-27 20:13:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:41,587 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-10-27 20:13:41,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-27 20:13:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-10-27 20:13:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 20:13:41,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:41,588 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:41,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 20:13:41,589 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:41,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1326222793, now seen corresponding path program 64 times [2020-10-27 20:13:41,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:41,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470961380] [2020-10-27 20:13:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:43,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:43,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 20:13:43,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2241 [2020-10-27 20:13:43,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-27 20:13:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 20:13:43,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:47,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:47,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:47,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:47,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:47,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:47,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:47,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:47,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470961380] [2020-10-27 20:13:47,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:47,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-27 20:13:47,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588856323] [2020-10-27 20:13:47,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-27 20:13:47,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:47,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-27 20:13:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 20:13:47,291 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 68 states. [2020-10-27 20:13:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:47,699 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-10-27 20:13:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-27 20:13:47,701 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 141 [2020-10-27 20:13:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:47,702 INFO L225 Difference]: With dead ends: 152 [2020-10-27 20:13:47,702 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 20:13:47,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 20:13:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 20:13:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-27 20:13:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 20:13:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2020-10-27 20:13:47,707 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2020-10-27 20:13:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:47,707 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2020-10-27 20:13:47,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-27 20:13:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2020-10-27 20:13:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 20:13:47,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:47,708 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:47,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 20:13:47,709 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 812259957, now seen corresponding path program 65 times [2020-10-27 20:13:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:47,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388692959] [2020-10-27 20:13:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:47,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:50,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:50,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 20:13:50,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:50,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2262 [2020-10-27 20:13:50,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:50,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-27 20:13:50,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:50,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 20:13:50,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:53,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:53,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:53,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:13:53,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388692959] [2020-10-27 20:13:53,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:13:53,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-27 20:13:53,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695821199] [2020-10-27 20:13:53,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-27 20:13:53,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:53,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-27 20:13:53,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:13:53,580 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 69 states. [2020-10-27 20:13:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:54,016 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-10-27 20:13:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-27 20:13:54,017 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 143 [2020-10-27 20:13:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:54,018 INFO L225 Difference]: With dead ends: 154 [2020-10-27 20:13:54,018 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 20:13:54,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:13:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 20:13:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-27 20:13:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 20:13:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2020-10-27 20:13:54,023 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2020-10-27 20:13:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:54,023 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2020-10-27 20:13:54,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-27 20:13:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2020-10-27 20:13:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 20:13:54,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:54,025 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:54,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 20:13:54,025 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1395152077, now seen corresponding path program 66 times [2020-10-27 20:13:54,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:54,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834828778] [2020-10-27 20:13:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:54,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:56,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:56,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 20:13:56,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:56,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2366 [2020-10-27 20:13:56,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-27 20:13:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-27 20:13:56,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:00,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:00,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834828778] [2020-10-27 20:14:00,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:00,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-27 20:14:00,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582757681] [2020-10-27 20:14:00,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-27 20:14:00,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:00,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-27 20:14:00,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 20:14:00,100 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 70 states. [2020-10-27 20:14:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:00,609 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-10-27 20:14:00,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-27 20:14:00,610 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 145 [2020-10-27 20:14:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:00,612 INFO L225 Difference]: With dead ends: 156 [2020-10-27 20:14:00,612 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 20:14:00,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-27 20:14:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 20:14:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-27 20:14:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 20:14:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2020-10-27 20:14:00,618 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2020-10-27 20:14:00,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:00,618 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2020-10-27 20:14:00,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-27 20:14:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2020-10-27 20:14:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 20:14:00,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:00,619 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:00,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 20:14:00,620 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1004272527, now seen corresponding path program 67 times [2020-10-27 20:14:00,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:00,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865378062] [2020-10-27 20:14:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:00,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:03,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:03,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 20:14:03,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:03,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2428 [2020-10-27 20:14:03,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-27 20:14:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-27 20:14:03,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:06,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:06,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:06,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:06,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:06,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:06,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:14:06,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:06,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:06,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:06,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:06,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865378062] [2020-10-27 20:14:06,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:06,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-27 20:14:06,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155400880] [2020-10-27 20:14:06,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-27 20:14:06,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-27 20:14:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:14:06,776 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 71 states. [2020-10-27 20:14:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:07,402 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-27 20:14:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-27 20:14:07,403 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 147 [2020-10-27 20:14:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:07,405 INFO L225 Difference]: With dead ends: 158 [2020-10-27 20:14:07,405 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 20:14:07,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:14:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 20:14:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-27 20:14:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 20:14:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2020-10-27 20:14:07,412 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2020-10-27 20:14:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:07,412 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2020-10-27 20:14:07,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-27 20:14:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2020-10-27 20:14:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 20:14:07,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:07,413 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:07,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 20:14:07,413 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash 968820271, now seen corresponding path program 68 times [2020-10-27 20:14:07,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:07,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323173591] [2020-10-27 20:14:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:07,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2622 [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 20:14:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:13,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:13,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:13,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:13,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:13,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:13,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:13,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:13,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:13,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:13,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323173591] [2020-10-27 20:14:13,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:13,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-27 20:14:13,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849878538] [2020-10-27 20:14:13,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-27 20:14:13,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-27 20:14:13,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 20:14:13,961 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 72 states. [2020-10-27 20:14:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:14,597 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-10-27 20:14:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-27 20:14:14,598 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 149 [2020-10-27 20:14:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:14,600 INFO L225 Difference]: With dead ends: 160 [2020-10-27 20:14:14,600 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 20:14:14,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 20:14:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 20:14:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-27 20:14:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 20:14:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-10-27 20:14:14,605 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2020-10-27 20:14:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:14,605 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-10-27 20:14:14,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-27 20:14:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-10-27 20:14:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 20:14:14,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:14,608 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:14,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 20:14:14,608 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:14,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:14,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1264545683, now seen corresponding path program 69 times [2020-10-27 20:14:14,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:14,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283235853] [2020-10-27 20:14:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:14,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:17,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:17,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 20:14:17,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:17,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2628 [2020-10-27 20:14:17,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:17,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-27 20:14:17,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:17,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-27 20:14:17,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:21,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:21,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:21,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:21,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:21,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:21,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:21,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:21,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:21,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283235853] [2020-10-27 20:14:21,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:21,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-27 20:14:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609562602] [2020-10-27 20:14:21,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-27 20:14:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-27 20:14:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:14:21,315 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 73 states. [2020-10-27 20:14:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:21,705 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-10-27 20:14:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-27 20:14:21,706 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 151 [2020-10-27 20:14:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:21,707 INFO L225 Difference]: With dead ends: 162 [2020-10-27 20:14:21,708 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 20:14:21,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:14:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 20:14:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-27 20:14:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 20:14:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2020-10-27 20:14:21,714 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2020-10-27 20:14:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:21,714 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2020-10-27 20:14:21,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-27 20:14:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2020-10-27 20:14:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 20:14:21,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:21,715 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:21,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 20:14:21,715 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash -45579477, now seen corresponding path program 70 times [2020-10-27 20:14:21,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:21,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719505926] [2020-10-27 20:14:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:21,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:24,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2724 [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-27 20:14:24,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:28,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:28,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:28,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:28,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719505926] [2020-10-27 20:14:28,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:28,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-27 20:14:28,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972781152] [2020-10-27 20:14:28,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-27 20:14:28,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:28,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-27 20:14:28,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 20:14:28,668 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 74 states. [2020-10-27 20:14:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:29,199 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-10-27 20:14:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-27 20:14:29,200 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 153 [2020-10-27 20:14:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:29,201 INFO L225 Difference]: With dead ends: 164 [2020-10-27 20:14:29,201 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 20:14:29,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-27 20:14:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 20:14:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-27 20:14:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 20:14:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2020-10-27 20:14:29,206 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2020-10-27 20:14:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:29,206 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2020-10-27 20:14:29,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-27 20:14:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2020-10-27 20:14:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 20:14:29,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:29,207 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:29,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 20:14:29,208 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1145127319, now seen corresponding path program 71 times [2020-10-27 20:14:29,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:29,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416826088] [2020-10-27 20:14:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:29,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:31,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:31,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 20:14:31,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2757 [2020-10-27 20:14:31,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:31,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-27 20:14:31,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:31,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-27 20:14:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:36,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:36,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:36,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:36,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:36,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416826088] [2020-10-27 20:14:36,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:36,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-27 20:14:36,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486425478] [2020-10-27 20:14:36,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-27 20:14:36,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:36,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-27 20:14:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:14:36,261 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 75 states. [2020-10-27 20:14:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:36,952 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-10-27 20:14:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-27 20:14:36,953 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 155 [2020-10-27 20:14:36,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:36,955 INFO L225 Difference]: With dead ends: 166 [2020-10-27 20:14:36,955 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 20:14:36,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:14:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 20:14:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-27 20:14:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 20:14:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2020-10-27 20:14:36,961 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2020-10-27 20:14:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:36,961 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2020-10-27 20:14:36,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-27 20:14:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2020-10-27 20:14:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 20:14:36,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:36,962 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:36,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 20:14:36,963 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:36,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1248648665, now seen corresponding path program 72 times [2020-10-27 20:14:36,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:36,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195811751] [2020-10-27 20:14:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:37,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:39,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:39,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 20:14:39,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:39,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2818 [2020-10-27 20:14:39,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-27 20:14:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 20:14:39,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:44,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:44,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:44,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:44,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:44,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195811751] [2020-10-27 20:14:44,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:44,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-27 20:14:44,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828453731] [2020-10-27 20:14:44,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-27 20:14:44,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-27 20:14:44,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 20:14:44,207 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 76 states. [2020-10-27 20:14:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:44,678 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-27 20:14:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-27 20:14:44,679 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 157 [2020-10-27 20:14:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:44,681 INFO L225 Difference]: With dead ends: 168 [2020-10-27 20:14:44,681 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 20:14:44,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-27 20:14:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 20:14:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-27 20:14:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 20:14:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2020-10-27 20:14:44,686 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2020-10-27 20:14:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:44,686 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2020-10-27 20:14:44,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-27 20:14:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2020-10-27 20:14:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 20:14:44,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:44,687 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:44,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-27 20:14:44,688 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:44,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1948414363, now seen corresponding path program 73 times [2020-10-27 20:14:44,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:44,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773074201] [2020-10-27 20:14:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:44,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:47,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:47,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 20:14:47,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:47,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2927 [2020-10-27 20:14:47,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-27 20:14:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:14:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 20:14:47,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:52,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:14:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:14:52,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:14:52,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:14:52,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:14:52,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:14:52,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:14:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:14:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:14:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:14:52,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:14:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:14:52,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773074201] [2020-10-27 20:14:52,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:14:52,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-27 20:14:52,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833549698] [2020-10-27 20:14:52,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-27 20:14:52,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:14:52,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-27 20:14:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:14:52,196 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 77 states. [2020-10-27 20:14:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:14:52,912 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-10-27 20:14:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-27 20:14:52,913 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 159 [2020-10-27 20:14:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:14:52,914 INFO L225 Difference]: With dead ends: 170 [2020-10-27 20:14:52,914 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 20:14:52,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:14:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 20:14:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-27 20:14:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 20:14:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-10-27 20:14:52,920 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2020-10-27 20:14:52,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:14:52,921 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-10-27 20:14:52,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-27 20:14:52,921 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-10-27 20:14:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 20:14:52,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:14:52,922 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:14:52,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-27 20:14:52,922 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:14:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:14:52,922 INFO L82 PathProgramCache]: Analyzing trace with hash -113384669, now seen corresponding path program 74 times [2020-10-27 20:14:52,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:14:52,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837747376] [2020-10-27 20:14:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:14:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:14:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking...