/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:13:41,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:13:41,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:13:41,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:13:41,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:13:41,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:13:41,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:13:41,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:13:41,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:13:41,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:13:41,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:13:41,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:13:41,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:13:41,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:13:41,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:13:41,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:13:41,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:13:41,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:13:41,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:13:41,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:13:41,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:13:41,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:13:41,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:13:41,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:13:41,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:13:41,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:13:41,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:13:41,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:13:41,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:13:41,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-26 19:13:41,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:13:41,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:13:41,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:13:41,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:13:41,427 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:13:41,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:13:41,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:13:41,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:13:41,433 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:13:41,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:13:41,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:13:41,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:13:41,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:13:41,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:13:41,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:13:41,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:13:41,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:13:41,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:13:41,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:13:41,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:13:41,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:13:41,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:13:41,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:13:41,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:13:41,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:13:41,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:41,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:13:41,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:13:41,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:13:41,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:13:41,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:13:41,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:13:41,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:13:41,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:13:41,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:13:41,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:13:41,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:13:41,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:13:41,926 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:13:41,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-26 19:13:42,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd8fda75e/07154e89f06c4b5fad4ace718bc82a65/FLAG9aa016d05 [2020-10-26 19:13:42,760 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:13:42,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-26 19:13:42,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd8fda75e/07154e89f06c4b5fad4ace718bc82a65/FLAG9aa016d05 [2020-10-26 19:13:43,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd8fda75e/07154e89f06c4b5fad4ace718bc82a65 [2020-10-26 19:13:43,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:13:43,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:13:43,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:43,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:13:43,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:13:43,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191418ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43, skipping insertion in model container [2020-10-26 19:13:43,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:13:43,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:13:43,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:43,385 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:13:43,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:43,433 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:13:43,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43 WrapperNode [2020-10-26 19:13:43,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:43,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:13:43,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:13:43,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:13:43,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... [2020-10-26 19:13:43,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:13:43,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:13:43,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:13:43,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:13:43,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:13:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:13:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:13:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:13:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:13:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:13:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:13:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:13:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:13:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:13:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:13:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:13:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:13:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:13:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:13:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:13:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:13:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:13:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:13:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:13:44,045 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:13:44,046 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-26 19:13:44,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:44 BoogieIcfgContainer [2020-10-26 19:13:44,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:13:44,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:13:44,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:13:44,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:13:44,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:13:43" (1/3) ... [2020-10-26 19:13:44,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d40fb5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:44, skipping insertion in model container [2020-10-26 19:13:44,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:43" (2/3) ... [2020-10-26 19:13:44,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d40fb5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:44, skipping insertion in model container [2020-10-26 19:13:44,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:44" (3/3) ... [2020-10-26 19:13:44,073 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2020-10-26 19:13:44,099 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:13:44,105 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:13:44,122 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:13:44,174 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:13:44,174 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:13:44,175 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:13:44,175 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:13:44,175 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:13:44,175 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:13:44,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:13:44,175 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:13:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-26 19:13:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:44,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:44,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:44,214 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:44,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1006986874, now seen corresponding path program 1 times [2020-10-26 19:13:44,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:44,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73584845] [2020-10-26 19:13:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:13:44,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 19:13:44,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:44,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:44,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:13:44,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:44,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:44,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:13:44,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:44,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73584845] [2020-10-26 19:13:44,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:44,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:13:44,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192023535] [2020-10-26 19:13:44,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:13:44,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:13:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:44,763 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-26 19:13:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:44,953 INFO L93 Difference]: Finished difference Result 89 states and 133 transitions. [2020-10-26 19:13:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:13:44,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-26 19:13:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:44,965 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:13:44,965 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:13:44,970 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 [2020-10-26 19:13:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:13:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:13:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:13:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-26 19:13:45,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-26 19:13:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:45,020 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-26 19:13:45,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:13:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-26 19:13:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:45,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:45,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:45,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:13:45,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1889588042, now seen corresponding path program 1 times [2020-10-26 19:13:45,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:45,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207578840] [2020-10-26 19:13:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:45,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:45,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:13:45,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:45,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-26 19:13:45,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:45,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:13:45,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:45,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:13:45,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:45,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:45,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:45,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:45,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:45,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:13:45,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:45,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207578840] [2020-10-26 19:13:45,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:45,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:13:45,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813662456] [2020-10-26 19:13:45,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:13:45,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:13:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:45,394 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-26 19:13:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:45,560 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-26 19:13:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:13:45,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-26 19:13:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:45,562 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:13:45,563 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:13:45,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:13:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:13:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:13:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-26 19:13:45,576 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2020-10-26 19:13:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:45,576 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-26 19:13:45,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:13:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-26 19:13:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:13:45,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:45,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:45,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:13:45,578 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:45,579 INFO L82 PathProgramCache]: Analyzing trace with hash -888776724, now seen corresponding path program 1 times [2020-10-26 19:13:45,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:45,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342847422] [2020-10-26 19:13:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:45,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:13:45,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:45,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-26 19:13:45,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:13:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:45,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:45,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:45,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:45,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:45,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:13:45,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:45,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:45,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:45,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:45,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:45,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342847422] [2020-10-26 19:13:45,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:45,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:13:45,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861042787] [2020-10-26 19:13:45,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:13:45,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:13:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:45,836 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 5 states. [2020-10-26 19:13:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:45,977 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-26 19:13:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:13:45,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-26 19:13:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:45,978 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:13:45,979 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:13:45,980 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 [2020-10-26 19:13:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:13:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:13:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:13:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-10-26 19:13:45,989 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2020-10-26 19:13:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:45,990 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-10-26 19:13:45,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:13:45,990 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-10-26 19:13:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:13:45,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:45,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:45,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:13:45,992 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:45,992 INFO L82 PathProgramCache]: Analyzing trace with hash 572341262, now seen corresponding path program 2 times [2020-10-26 19:13:45,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:45,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101679340] [2020-10-26 19:13:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:13:46,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-26 19:13:46,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:46,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:13:46,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:46,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:46,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:46,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:46,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:46,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101679340] [2020-10-26 19:13:46,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:46,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:13:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894913968] [2020-10-26 19:13:46,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:46,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:46,341 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 6 states. [2020-10-26 19:13:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:46,482 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-26 19:13:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:46,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-26 19:13:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:46,484 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:13:46,484 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:13:46,485 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 [2020-10-26 19:13:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:13:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:13:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:13:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-26 19:13:46,494 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2020-10-26 19:13:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:46,495 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-26 19:13:46,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-26 19:13:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:13:46,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:46,496 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:46,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:13:46,497 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash 252420016, now seen corresponding path program 3 times [2020-10-26 19:13:46,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:46,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294809378] [2020-10-26 19:13:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:13:46,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:46,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-26 19:13:46,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:13:46,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:46,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:13:46,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:46,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:46,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:46,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:46,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:46,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294809378] [2020-10-26 19:13:46,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:46,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:13:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755206815] [2020-10-26 19:13:46,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:13:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:13:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:46,865 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 7 states. [2020-10-26 19:13:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:47,014 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-26 19:13:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:13:47,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-26 19:13:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:47,016 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:13:47,016 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:13:47,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:13:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:13:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:13:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-26 19:13:47,024 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 24 [2020-10-26 19:13:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:47,025 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-26 19:13:47,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:13:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-26 19:13:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:13:47,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:47,026 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:47,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:13:47,027 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2045747922, now seen corresponding path program 4 times [2020-10-26 19:13:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:47,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388435272] [2020-10-26 19:13:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:47,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:13:47,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:47,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-26 19:13:47,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:47,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:13:47,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:47,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:13:47,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:47,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:47,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:47,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:47,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:47,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:47,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:47,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:47,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:47,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:47,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:47,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388435272] [2020-10-26 19:13:47,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:47,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:13:47,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145256413] [2020-10-26 19:13:47,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:13:47,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:13:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:47,387 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 8 states. [2020-10-26 19:13:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:47,528 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-26 19:13:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:13:47,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-26 19:13:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:47,529 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:13:47,529 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:13:47,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:13:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:13:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:13:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-26 19:13:47,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 26 [2020-10-26 19:13:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:47,538 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-26 19:13:47,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:13:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-26 19:13:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:13:47,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:47,539 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:47,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:13:47,540 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1142987404, now seen corresponding path program 5 times [2020-10-26 19:13:47,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:47,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251196735] [2020-10-26 19:13:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:47,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:47,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:13:47,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:47,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 19:13:47,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:13:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:47,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:13:47,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:47,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:47,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:47,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:47,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:47,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:47,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:47,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:47,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:47,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:47,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:47,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251196735] [2020-10-26 19:13:47,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:47,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:13:47,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375605959] [2020-10-26 19:13:47,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:13:47,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:13:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:47,986 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 9 states. [2020-10-26 19:13:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:48,128 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-10-26 19:13:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:13:48,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-26 19:13:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:48,130 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:13:48,130 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:13:48,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:13:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:13:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:13:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-26 19:13:48,138 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 28 [2020-10-26 19:13:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:48,139 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-26 19:13:48,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:13:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-26 19:13:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:13:48,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:48,140 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:48,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:13:48,141 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1089013654, now seen corresponding path program 6 times [2020-10-26 19:13:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:48,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018143817] [2020-10-26 19:13:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:48,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:48,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:13:48,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:48,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-26 19:13:48,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:13:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:13:48,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:48,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:48,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:48,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:48,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:48,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:48,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:48,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:48,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:48,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:48,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018143817] [2020-10-26 19:13:48,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:48,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:13:48,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749854611] [2020-10-26 19:13:48,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:13:48,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:13:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:13:48,648 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 10 states. [2020-10-26 19:13:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:48,784 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-26 19:13:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:13:48,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-26 19:13:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:48,786 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:13:48,786 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:13:48,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:13:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:13:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:13:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:13:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-26 19:13:48,794 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2020-10-26 19:13:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:48,794 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-26 19:13:48,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:13:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-26 19:13:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:13:48,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:48,796 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:48,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:13:48,796 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:48,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1441617608, now seen corresponding path program 7 times [2020-10-26 19:13:48,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:48,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973389670] [2020-10-26 19:13:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:48,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:49,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:13:49,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:49,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-26 19:13:49,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:13:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:13:49,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:49,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:49,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:49,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:49,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:49,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:49,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:49,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:49,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:49,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:49,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:49,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973389670] [2020-10-26 19:13:49,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:49,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:13:49,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852852618] [2020-10-26 19:13:49,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:13:49,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:49,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:13:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:13:49,400 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 11 states. [2020-10-26 19:13:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:49,545 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2020-10-26 19:13:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:13:49,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:13:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:49,547 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:13:49,547 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:13:49,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:13:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:13:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:13:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:13:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-26 19:13:49,554 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 32 [2020-10-26 19:13:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:49,555 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-26 19:13:49,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:13:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-26 19:13:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:13:49,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:49,556 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:49,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:13:49,557 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1868196442, now seen corresponding path program 8 times [2020-10-26 19:13:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:49,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756950231] [2020-10-26 19:13:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:49,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:50,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:50,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:13:50,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-26 19:13:50,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:13:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:13:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:50,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:50,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:50,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:50,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:50,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:50,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:50,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:50,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:50,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:50,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:50,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:50,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756950231] [2020-10-26 19:13:50,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:50,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:13:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546009609] [2020-10-26 19:13:50,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:13:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:50,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:13:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:13:50,242 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 12 states. [2020-10-26 19:13:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:50,446 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2020-10-26 19:13:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:13:50,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-26 19:13:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:50,447 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:13:50,447 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:13:50,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:13:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:13:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:13:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:13:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-26 19:13:50,458 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 34 [2020-10-26 19:13:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:50,458 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-26 19:13:50,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:13:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-26 19:13:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:13:50,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:50,460 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:50,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:13:50,460 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 28732156, now seen corresponding path program 9 times [2020-10-26 19:13:50,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:50,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301040269] [2020-10-26 19:13:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:50,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:50,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:51,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:13:51,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-26 19:13:51,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:13:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:13:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:51,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:51,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:51,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:51,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:51,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:51,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:51,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:51,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:51,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:51,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301040269] [2020-10-26 19:13:51,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:51,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:13:51,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151319269] [2020-10-26 19:13:51,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:13:51,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:51,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:13:51,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:13:51,393 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2020-10-26 19:13:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:51,543 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-26 19:13:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:13:51,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:13:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:51,545 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:13:51,545 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:13:51,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:13:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:13:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:13:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:13:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-26 19:13:51,555 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 36 [2020-10-26 19:13:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:51,556 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-26 19:13:51,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:13:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-26 19:13:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:13:51,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:51,561 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:51,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:13:51,562 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:51,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1830079262, now seen corresponding path program 10 times [2020-10-26 19:13:51,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:51,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527030111] [2020-10-26 19:13:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:52,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:13:52,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:52,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-26 19:13:52,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:13:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:52,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:13:52,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:52,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:52,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:52,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:52,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:52,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:52,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:52,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:52,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527030111] [2020-10-26 19:13:52,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:52,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:13:52,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955718460] [2020-10-26 19:13:52,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:13:52,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:52,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:13:52,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:13:52,670 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 14 states. [2020-10-26 19:13:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:52,864 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-26 19:13:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:13:52,864 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-26 19:13:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:52,865 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:13:52,865 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:13:52,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:13:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:13:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:13:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:13:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-26 19:13:52,879 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 38 [2020-10-26 19:13:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:52,879 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-26 19:13:52,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:13:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-26 19:13:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:13:52,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:52,880 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:52,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:13:52,880 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:52,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2052827840, now seen corresponding path program 11 times [2020-10-26 19:13:52,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:52,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473077477] [2020-10-26 19:13:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:52,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:53,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:13:53,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-26 19:13:53,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:13:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:13:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:54,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:54,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:54,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:13:54,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:54,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:54,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:54,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:54,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:54,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473077477] [2020-10-26 19:13:54,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:54,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:13:54,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634554200] [2020-10-26 19:13:54,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:13:54,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:13:54,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:13:54,176 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 15 states. [2020-10-26 19:13:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:54,384 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-10-26 19:13:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:13:54,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-26 19:13:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:54,385 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:13:54,385 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:13:54,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:13:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:13:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:13:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:13:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-26 19:13:54,402 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 40 [2020-10-26 19:13:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:54,403 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-26 19:13:54,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:13:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-26 19:13:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:13:54,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:54,406 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:54,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:13:54,407 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1365846498, now seen corresponding path program 12 times [2020-10-26 19:13:54,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:54,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521634205] [2020-10-26 19:13:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:54,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:55,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:13:55,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:55,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-26 19:13:55,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:13:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:55,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:13:55,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:55,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:55,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:55,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:55,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:55,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:55,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:55,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:55,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:55,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:55,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521634205] [2020-10-26 19:13:55,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:55,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:13:55,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944816479] [2020-10-26 19:13:55,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:13:55,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:55,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:13:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:13:55,712 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 16 states. [2020-10-26 19:13:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:55,911 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2020-10-26 19:13:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:13:55,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-26 19:13:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:55,913 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:13:55,913 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:13:55,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:13:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:13:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:13:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:13:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-26 19:13:55,921 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 42 [2020-10-26 19:13:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:55,922 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-26 19:13:55,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:13:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-26 19:13:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:13:55,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:55,923 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:55,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:13:55,923 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:55,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1693226876, now seen corresponding path program 13 times [2020-10-26 19:13:55,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:55,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719074976] [2020-10-26 19:13:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:13:57,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:57,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-26 19:13:57,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:13:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:57,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:13:57,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:57,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:57,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:57,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:57,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719074976] [2020-10-26 19:13:57,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:57,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:13:57,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719587961] [2020-10-26 19:13:57,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:13:57,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:57,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:13:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:13:57,471 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 17 states. [2020-10-26 19:13:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:57,690 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2020-10-26 19:13:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:13:57,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-26 19:13:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:57,692 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:13:57,692 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:13:57,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:13:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:13:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:13:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:13:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-26 19:13:57,701 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 44 [2020-10-26 19:13:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:57,701 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-26 19:13:57,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:13:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-26 19:13:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:13:57,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:57,702 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:57,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:13:57,702 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash 589858470, now seen corresponding path program 14 times [2020-10-26 19:13:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:57,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891873933] [2020-10-26 19:13:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:13:59,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:59,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1569 [2020-10-26 19:13:59,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:13:59,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:59,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:13:59,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:59,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:59,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:59,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:13:59,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:59,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891873933] [2020-10-26 19:13:59,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:59,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:13:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383483020] [2020-10-26 19:13:59,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:13:59,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:59,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:13:59,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:13:59,505 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 18 states. [2020-10-26 19:13:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:59,680 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2020-10-26 19:13:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:13:59,680 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-26 19:13:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:59,681 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:13:59,681 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:13:59,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:13:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:13:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:13:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:13:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-10-26 19:13:59,687 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 46 [2020-10-26 19:13:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:59,687 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-10-26 19:13:59,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:13:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-10-26 19:13:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:13:59,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:59,688 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:59,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:13:59,695 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash -93412280, now seen corresponding path program 15 times [2020-10-26 19:13:59,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:59,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777159292] [2020-10-26 19:13:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:59,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:01,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:14:01,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:01,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-26 19:14:01,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:14:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:01,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:14:01,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:01,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:01,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:01,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:01,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:01,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:01,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:01,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777159292] [2020-10-26 19:14:01,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:01,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:14:01,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173060121] [2020-10-26 19:14:01,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:14:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:01,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:14:01,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:01,420 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 19 states. [2020-10-26 19:14:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:01,633 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2020-10-26 19:14:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:14:01,634 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:14:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:01,634 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:14:01,635 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:14:01,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:14:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:14:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:14:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-26 19:14:01,643 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 48 [2020-10-26 19:14:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:01,644 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-26 19:14:01,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:14:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-26 19:14:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:14:01,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:01,645 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:01,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:14:01,645 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:01,646 INFO L82 PathProgramCache]: Analyzing trace with hash 413393258, now seen corresponding path program 16 times [2020-10-26 19:14:01,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:01,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36712333] [2020-10-26 19:14:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:01,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:03,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:14:03,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1590 [2020-10-26 19:14:03,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:14:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:14:03,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:03,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:03,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:03,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:03,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:14:03,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:03,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:03,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:03,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:03,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36712333] [2020-10-26 19:14:03,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:03,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:14:03,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488795485] [2020-10-26 19:14:03,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:14:03,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:03,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:14:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:03,547 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 20 states. [2020-10-26 19:14:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:03,771 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-10-26 19:14:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:14:03,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-26 19:14:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:03,773 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:14:03,774 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:14:03,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:14:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:14:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:14:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-26 19:14:03,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 50 [2020-10-26 19:14:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:03,780 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-26 19:14:03,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:14:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-26 19:14:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:14:03,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:03,781 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:03,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:14:03,782 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2122210828, now seen corresponding path program 17 times [2020-10-26 19:14:03,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:03,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557161036] [2020-10-26 19:14:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:03,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:14:05,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:05,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1751 [2020-10-26 19:14:05,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:14:05,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:05,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:14:05,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:05,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:05,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:05,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:05,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:05,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:05,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:05,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557161036] [2020-10-26 19:14:05,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:05,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:14:05,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793950980] [2020-10-26 19:14:05,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:14:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:14:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:05,829 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 21 states. [2020-10-26 19:14:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:05,976 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-10-26 19:14:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:14:05,977 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-26 19:14:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:05,978 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:14:05,978 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:14:05,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:14:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:14:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:14:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:14:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-26 19:14:05,986 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 52 [2020-10-26 19:14:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:05,986 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-26 19:14:05,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:14:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-26 19:14:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:14:05,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:05,989 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:05,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:14:05,989 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:05,990 INFO L82 PathProgramCache]: Analyzing trace with hash -676578770, now seen corresponding path program 18 times [2020-10-26 19:14:05,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:05,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373252570] [2020-10-26 19:14:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:06,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:14:07,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:07,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:14:07,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:08,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:08,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:08,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:08,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:08,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:14:08,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:08,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:08,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373252570] [2020-10-26 19:14:08,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:08,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:14:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437192388] [2020-10-26 19:14:08,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:14:08,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:14:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:08,082 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 22 states. [2020-10-26 19:14:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:08,342 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-26 19:14:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:14:08,343 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-26 19:14:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:08,344 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:14:08,344 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:14:08,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:14:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:14:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:14:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:14:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-10-26 19:14:08,356 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 54 [2020-10-26 19:14:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:08,356 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-10-26 19:14:08,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:14:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-10-26 19:14:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:14:08,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:08,359 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:08,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:14:08,359 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1663855152, now seen corresponding path program 19 times [2020-10-26 19:14:08,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:08,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60084003] [2020-10-26 19:14:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:08,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:14:10,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:10,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1945 [2020-10-26 19:14:10,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:14:10,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:10,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:14:10,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:10,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:10,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:10,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:10,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:10,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:10,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:10,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:10,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60084003] [2020-10-26 19:14:10,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:10,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:14:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255366150] [2020-10-26 19:14:10,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:14:10,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:10,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:14:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:10,640 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 23 states. [2020-10-26 19:14:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:10,876 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-26 19:14:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:14:10,876 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-26 19:14:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:10,877 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:14:10,878 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:14:10,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:14:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:14:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:14:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:14:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-26 19:14:10,887 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 56 [2020-10-26 19:14:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-26 19:14:10,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:14:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-26 19:14:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:14:10,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:10,888 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:10,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:14:10,888 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1248685838, now seen corresponding path program 20 times [2020-10-26 19:14:10,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:10,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114641714] [2020-10-26 19:14:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:12,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:14:12,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:12,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1943 [2020-10-26 19:14:12,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:14:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:14:12,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:13,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:13,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:13,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:13,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:13,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:13,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:13,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:13,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:13,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:13,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:13,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:13,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114641714] [2020-10-26 19:14:13,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:13,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:14:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153607249] [2020-10-26 19:14:13,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:14:13,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:14:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:13,207 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 24 states. [2020-10-26 19:14:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:13,454 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-26 19:14:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:14:13,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-26 19:14:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:13,456 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:14:13,456 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:14:13,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:14:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:14:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:14:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-10-26 19:14:13,467 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 58 [2020-10-26 19:14:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:13,468 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-10-26 19:14:13,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:14:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-10-26 19:14:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:14:13,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:13,469 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:13,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:14:13,469 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1702933612, now seen corresponding path program 21 times [2020-10-26 19:14:13,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:13,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048134528] [2020-10-26 19:14:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:13,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:13,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:15,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:14:15,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:15,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1971 [2020-10-26 19:14:15,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:14:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:14:15,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:15,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:15,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:15,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:15,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:15,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:15,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:15,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:15,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:15,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:15,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048134528] [2020-10-26 19:14:15,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:15,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:14:15,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695365221] [2020-10-26 19:14:15,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:14:15,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:15,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:14:15,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:15,885 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 25 states. [2020-10-26 19:14:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:16,144 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2020-10-26 19:14:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:14:16,145 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-26 19:14:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:16,146 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:14:16,146 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:14:16,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:14:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:14:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:14:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:14:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-26 19:14:16,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 60 [2020-10-26 19:14:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:16,152 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-26 19:14:16,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:14:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-26 19:14:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:14:16,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:16,153 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:16,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:14:16,153 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash -148380234, now seen corresponding path program 22 times [2020-10-26 19:14:16,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:16,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791632805] [2020-10-26 19:14:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:18,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:14:18,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:18,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1910 [2020-10-26 19:14:18,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:18,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:14:18,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:18,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:14:18,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:18,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:18,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:18,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:18,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:18,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:18,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:18,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:18,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:18,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:18,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:18,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791632805] [2020-10-26 19:14:18,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:18,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:14:18,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87082231] [2020-10-26 19:14:18,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:14:18,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:14:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:14:18,541 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 26 states. [2020-10-26 19:14:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:18,898 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2020-10-26 19:14:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:14:18,899 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-26 19:14:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:18,900 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:14:18,901 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:14:18,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:14:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:14:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:14:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:14:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-26 19:14:18,909 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 62 [2020-10-26 19:14:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:18,910 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-26 19:14:18,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:14:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-26 19:14:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:14:18,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:18,912 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:18,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:14:18,914 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:18,915 INFO L82 PathProgramCache]: Analyzing trace with hash -871202984, now seen corresponding path program 23 times [2020-10-26 19:14:18,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:18,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784551908] [2020-10-26 19:14:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:21,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:14:21,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:21,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-26 19:14:21,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:21,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:14:21,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:21,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:14:21,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:21,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:21,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:21,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:21,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:21,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:21,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:21,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:21,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784551908] [2020-10-26 19:14:21,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:21,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:14:21,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677355767] [2020-10-26 19:14:21,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:14:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:14:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:14:21,506 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 27 states. [2020-10-26 19:14:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:21,719 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2020-10-26 19:14:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:14:21,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:14:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:21,721 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:14:21,721 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:14:21,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:14:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:14:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:14:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:14:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-26 19:14:21,727 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 64 [2020-10-26 19:14:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:21,727 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-26 19:14:21,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:14:21,728 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-26 19:14:21,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:14:21,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:21,728 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:21,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:14:21,729 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash 280836218, now seen corresponding path program 24 times [2020-10-26 19:14:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:21,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487380864] [2020-10-26 19:14:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:23,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:14:23,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1986 [2020-10-26 19:14:23,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:14:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:23,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:14:23,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:24,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:24,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:24,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:24,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487380864] [2020-10-26 19:14:24,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:24,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:14:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046259721] [2020-10-26 19:14:24,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:14:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:14:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:14:24,208 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 28 states. [2020-10-26 19:14:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:24,536 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-10-26 19:14:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:14:24,537 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-26 19:14:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:24,538 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:14:24,539 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:14:24,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:14:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:14:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:14:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:14:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2020-10-26 19:14:24,544 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 66 [2020-10-26 19:14:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:24,545 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2020-10-26 19:14:24,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:14:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2020-10-26 19:14:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:14:24,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:24,546 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:24,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:14:24,546 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash -711053028, now seen corresponding path program 25 times [2020-10-26 19:14:24,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:24,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484204995] [2020-10-26 19:14:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:24,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:26,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:14:26,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2111 [2020-10-26 19:14:26,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:14:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:14:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:27,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:27,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:27,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:27,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:27,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:27,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484204995] [2020-10-26 19:14:27,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:27,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:14:27,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127587900] [2020-10-26 19:14:27,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:14:27,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:14:27,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:14:27,193 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 29 states. [2020-10-26 19:14:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:27,528 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2020-10-26 19:14:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:14:27,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2020-10-26 19:14:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:27,530 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:14:27,530 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:14:27,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:14:27,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:14:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:14:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:14:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-10-26 19:14:27,538 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 68 [2020-10-26 19:14:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:27,538 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-10-26 19:14:27,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:14:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-10-26 19:14:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:14:27,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:27,539 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:27,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:14:27,539 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash -433878722, now seen corresponding path program 26 times [2020-10-26 19:14:27,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:27,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146417599] [2020-10-26 19:14:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2215 [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:14:29,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:30,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:30,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:30,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:30,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:30,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:30,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:30,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:30,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146417599] [2020-10-26 19:14:30,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:30,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:14:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100372669] [2020-10-26 19:14:30,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:14:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:14:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:14:30,309 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 30 states. [2020-10-26 19:14:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:30,662 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2020-10-26 19:14:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:14:30,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-26 19:14:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:30,664 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:14:30,664 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:14:30,665 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 [2020-10-26 19:14:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:14:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:14:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:14:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-10-26 19:14:30,670 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 70 [2020-10-26 19:14:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:30,670 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-10-26 19:14:30,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:14:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-10-26 19:14:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:14:30,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:30,671 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:30,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:14:30,671 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash -357343008, now seen corresponding path program 27 times [2020-10-26 19:14:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:30,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613902281] [2020-10-26 19:14:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:14:33,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:33,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:33,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:33,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:33,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:33,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:14:33,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:33,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:33,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:33,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:33,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:33,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613902281] [2020-10-26 19:14:33,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:33,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:14:33,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398341014] [2020-10-26 19:14:33,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:14:33,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:14:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:14:33,575 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 31 states. [2020-10-26 19:14:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:33,834 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-26 19:14:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:14:33,835 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-26 19:14:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:33,836 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:14:33,836 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:14:33,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:14:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:14:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:14:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:14:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-26 19:14:33,844 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 72 [2020-10-26 19:14:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:33,844 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-26 19:14:33,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:14:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-26 19:14:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:14:33,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:33,845 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:33,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:14:33,846 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:33,846 INFO L82 PathProgramCache]: Analyzing trace with hash 179034114, now seen corresponding path program 28 times [2020-10-26 19:14:33,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:33,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809653630] [2020-10-26 19:14:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:36,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2636 [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:14:36,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:37,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:37,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:37,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809653630] [2020-10-26 19:14:37,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:37,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:14:37,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321199387] [2020-10-26 19:14:37,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:14:37,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:37,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:14:37,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:14:37,118 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 32 states. [2020-10-26 19:14:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:37,438 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-26 19:14:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:14:37,438 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-26 19:14:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:37,440 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:14:37,440 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:14:37,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:14:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:14:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:14:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:14:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2020-10-26 19:14:37,453 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 74 [2020-10-26 19:14:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:37,453 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2020-10-26 19:14:37,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:14:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2020-10-26 19:14:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:14:37,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:37,454 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:37,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:14:37,455 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash 241372836, now seen corresponding path program 29 times [2020-10-26 19:14:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:37,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020143445] [2020-10-26 19:14:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:37,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:40,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:14:40,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:40,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2777 [2020-10-26 19:14:40,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:40,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:14:40,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:40,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:14:40,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:40,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:40,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:40,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:40,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:40,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:40,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:40,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020143445] [2020-10-26 19:14:40,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:40,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:14:40,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013114254] [2020-10-26 19:14:40,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:14:40,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:40,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:14:40,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:14:40,908 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand 33 states. [2020-10-26 19:14:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:41,241 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-26 19:14:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:14:41,241 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-26 19:14:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:41,242 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:14:41,243 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:14:41,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:14:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:14:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:14:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:14:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-10-26 19:14:41,250 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 76 [2020-10-26 19:14:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:41,250 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-10-26 19:14:41,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:14:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-10-26 19:14:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:14:41,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:41,251 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:41,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:14:41,252 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash 19342534, now seen corresponding path program 30 times [2020-10-26 19:14:41,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:41,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823717188] [2020-10-26 19:14:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:41,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3296 [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:14:44,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:45,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:45,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:45,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:45,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:45,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:45,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:45,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:45,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:45,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:45,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823717188] [2020-10-26 19:14:45,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:45,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:14:45,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807718855] [2020-10-26 19:14:45,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:14:45,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:45,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:14:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:14:45,244 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 34 states. [2020-10-26 19:14:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:45,533 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2020-10-26 19:14:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:14:45,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-10-26 19:14:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:45,534 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:14:45,534 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:14:45,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:14:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:14:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:14:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:14:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-10-26 19:14:45,541 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 78 [2020-10-26 19:14:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:45,542 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-10-26 19:14:45,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:14:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-10-26 19:14:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:14:45,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:45,543 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:45,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:14:45,543 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1396587112, now seen corresponding path program 31 times [2020-10-26 19:14:45,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:45,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692995524] [2020-10-26 19:14:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:45,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:48,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:48,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:14:48,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3104 [2020-10-26 19:14:48,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:14:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:14:48,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:49,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:49,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:49,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:49,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:49,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:49,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:49,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:49,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:49,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692995524] [2020-10-26 19:14:49,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:49,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:14:49,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567003885] [2020-10-26 19:14:49,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:14:49,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:14:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:14:49,316 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 35 states. [2020-10-26 19:14:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:49,631 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2020-10-26 19:14:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:14:49,632 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2020-10-26 19:14:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:49,633 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:14:49,633 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:14:49,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:14:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:14:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:14:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:14:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-10-26 19:14:49,645 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 80 [2020-10-26 19:14:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:49,647 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-10-26 19:14:49,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:14:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-10-26 19:14:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:14:49,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:49,648 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:49,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:14:49,648 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2078699402, now seen corresponding path program 32 times [2020-10-26 19:14:49,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:49,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587195192] [2020-10-26 19:14:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:49,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:53,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3360 [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:14:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:53,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:53,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:53,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:53,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:53,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:53,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:53,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:53,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:53,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:53,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:53,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:53,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587195192] [2020-10-26 19:14:53,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:53,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:14:53,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106270025] [2020-10-26 19:14:53,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:14:53,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:53,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:14:53,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:14:53,775 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 36 states. [2020-10-26 19:14:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:53,995 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2020-10-26 19:14:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:14:53,997 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2020-10-26 19:14:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:53,999 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:14:53,999 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:14:54,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:14:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:14:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:14:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:14:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2020-10-26 19:14:54,010 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 82 [2020-10-26 19:14:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:54,011 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2020-10-26 19:14:54,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:14:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2020-10-26 19:14:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:14:54,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:54,012 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:54,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:14:54,012 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash 458613804, now seen corresponding path program 33 times [2020-10-26 19:14:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:54,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322089518] [2020-10-26 19:14:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:54,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:54,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:57,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3891 [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:14:57,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:58,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:58,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:58,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:58,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:58,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:58,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:58,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322089518] [2020-10-26 19:14:58,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:58,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:14:58,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785909444] [2020-10-26 19:14:58,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:14:58,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:14:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:14:58,702 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 37 states. [2020-10-26 19:14:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:59,034 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-10-26 19:14:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:14:59,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-10-26 19:14:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:59,036 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:14:59,036 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:14:59,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:14:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:14:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:14:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:14:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2020-10-26 19:14:59,042 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 84 [2020-10-26 19:14:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:59,043 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2020-10-26 19:14:59,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:14:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2020-10-26 19:14:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:14:59,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:59,044 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:59,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:14:59,044 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1665484722, now seen corresponding path program 34 times [2020-10-26 19:14:59,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:59,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74398399] [2020-10-26 19:14:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:59,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:59,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3962 [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:03,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:15:03,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:03,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:03,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:03,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:03,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:03,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:03,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74398399] [2020-10-26 19:15:03,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:03,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:15:03,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933007624] [2020-10-26 19:15:03,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:15:03,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:03,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:15:03,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:15:03,855 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 38 states. [2020-10-26 19:15:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:04,239 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2020-10-26 19:15:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:15:04,239 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-26 19:15:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:04,241 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:15:04,241 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:15:04,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:15:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:15:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:15:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:15:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2020-10-26 19:15:04,247 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 86 [2020-10-26 19:15:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:04,248 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2020-10-26 19:15:04,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:15:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2020-10-26 19:15:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:15:04,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:04,249 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:04,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:15:04,249 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:04,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1480264688, now seen corresponding path program 35 times [2020-10-26 19:15:04,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:04,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102629128] [2020-10-26 19:15:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:04,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:04,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4211 [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:15:08,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:09,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:09,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:09,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:09,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:09,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:09,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:09,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:09,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:09,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:09,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:09,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102629128] [2020-10-26 19:15:09,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:09,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:15:09,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362628443] [2020-10-26 19:15:09,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:15:09,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:15:09,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:15:09,349 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 39 states. [2020-10-26 19:15:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:09,669 INFO L93 Difference]: Finished difference Result 148 states and 170 transitions. [2020-10-26 19:15:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:15:09,670 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2020-10-26 19:15:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:09,672 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:15:09,672 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:15:09,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:15:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:15:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:15:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:15:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-10-26 19:15:09,679 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 88 [2020-10-26 19:15:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:09,679 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-10-26 19:15:09,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:15:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-10-26 19:15:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:15:09,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:09,680 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:09,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:15:09,680 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash 888471314, now seen corresponding path program 36 times [2020-10-26 19:15:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:09,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967247421] [2020-10-26 19:15:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:09,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:14,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:14,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:15:14,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:14,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4636 [2020-10-26 19:15:14,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:15:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:15:14,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:15,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:15,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:15,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:15,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:15,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:15,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:15,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:15,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:15,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967247421] [2020-10-26 19:15:15,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:15,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:15:15,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244336437] [2020-10-26 19:15:15,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:15:15,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:15:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:15:15,208 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 40 states. [2020-10-26 19:15:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:15,610 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-10-26 19:15:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:15:15,610 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2020-10-26 19:15:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:15,612 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:15:15,612 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:15:15,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:15:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:15:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:15:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:15:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-10-26 19:15:15,619 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 90 [2020-10-26 19:15:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:15,619 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-10-26 19:15:15,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:15:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-10-26 19:15:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:15:15,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:15,620 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:15,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:15:15,621 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -889278028, now seen corresponding path program 37 times [2020-10-26 19:15:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:15,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487837035] [2020-10-26 19:15:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:15,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:20,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:20,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:15:20,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:20,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4840 [2020-10-26 19:15:20,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:15:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:15:20,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:21,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:21,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:21,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:21,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:21,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:21,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:21,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:21,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:21,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:21,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:21,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:21,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487837035] [2020-10-26 19:15:21,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:21,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:15:21,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105091318] [2020-10-26 19:15:21,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:15:21,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:21,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:15:21,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:15:21,398 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 41 states. [2020-10-26 19:15:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:21,795 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2020-10-26 19:15:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:15:21,796 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2020-10-26 19:15:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:21,797 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:15:21,797 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:15:21,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:15:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:15:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:15:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:15:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2020-10-26 19:15:21,808 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 92 [2020-10-26 19:15:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:21,808 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2020-10-26 19:15:21,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:15:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2020-10-26 19:15:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:15:21,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:21,810 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:21,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:15:21,811 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:21,811 INFO L82 PathProgramCache]: Analyzing trace with hash 90588118, now seen corresponding path program 38 times [2020-10-26 19:15:21,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:21,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546213309] [2020-10-26 19:15:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:21,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:21,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:15:26,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:27,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:27,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:27,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:27,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:27,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:27,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:27,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:27,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546213309] [2020-10-26 19:15:27,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:27,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:15:27,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220263816] [2020-10-26 19:15:27,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:15:27,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:27,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:15:27,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:15:27,848 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 42 states. [2020-10-26 19:15:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:28,258 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2020-10-26 19:15:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:15:28,259 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2020-10-26 19:15:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:28,260 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:15:28,260 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:15:28,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:15:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:15:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:15:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:15:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2020-10-26 19:15:28,268 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 94 [2020-10-26 19:15:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:28,268 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2020-10-26 19:15:28,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:15:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2020-10-26 19:15:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:15:28,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:28,270 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:28,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:15:28,270 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1144116600, now seen corresponding path program 39 times [2020-10-26 19:15:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:28,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886845627] [2020-10-26 19:15:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:28,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:33,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:33,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:15:33,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:33,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:15:33,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:33,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:15:33,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:33,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:15:33,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:34,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:34,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:34,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:34,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886845627] [2020-10-26 19:15:34,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:34,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:15:34,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869747458] [2020-10-26 19:15:34,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:15:34,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:34,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:15:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:15:34,348 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 43 states. [2020-10-26 19:15:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:34,767 INFO L93 Difference]: Finished difference Result 156 states and 178 transitions. [2020-10-26 19:15:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:15:34,768 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2020-10-26 19:15:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:34,769 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:15:34,769 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:15:34,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:15:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:15:34,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:15:34,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:15:34,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2020-10-26 19:15:34,777 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 96 [2020-10-26 19:15:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:34,777 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2020-10-26 19:15:34,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:15:34,777 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2020-10-26 19:15:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:15:34,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:34,779 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:34,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:15:34,779 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:34,779 INFO L82 PathProgramCache]: Analyzing trace with hash -27294054, now seen corresponding path program 40 times [2020-10-26 19:15:34,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:34,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84175277] [2020-10-26 19:15:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:34,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:34,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:15:39,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:40,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:40,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:40,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:40,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:40,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:40,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:40,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:40,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:40,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84175277] [2020-10-26 19:15:40,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:40,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:15:40,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129786237] [2020-10-26 19:15:40,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:15:40,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:40,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:15:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:15:40,935 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand 44 states. [2020-10-26 19:15:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:41,349 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-10-26 19:15:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:15:41,350 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2020-10-26 19:15:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:41,352 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:15:41,352 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:15:41,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:15:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:15:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:15:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:15:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-10-26 19:15:41,360 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 98 [2020-10-26 19:15:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:41,360 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-10-26 19:15:41,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:15:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-10-26 19:15:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:15:41,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:41,361 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:41,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:15:41,362 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash -471500996, now seen corresponding path program 41 times [2020-10-26 19:15:41,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:41,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444009112] [2020-10-26 19:15:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:41,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:41,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:15:46,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:46,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:15:46,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:15:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:15:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:47,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:47,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:47,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:47,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:47,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444009112] [2020-10-26 19:15:47,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:47,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:15:47,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130777116] [2020-10-26 19:15:47,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:15:47,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:15:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:15:47,577 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 45 states. [2020-10-26 19:15:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:48,033 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2020-10-26 19:15:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:15:48,033 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2020-10-26 19:15:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:48,036 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:15:48,036 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:15:48,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:15:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:15:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-26 19:15:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:15:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-10-26 19:15:48,046 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 100 [2020-10-26 19:15:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:48,047 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-10-26 19:15:48,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:15:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-10-26 19:15:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:15:48,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:48,048 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:48,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:15:48,048 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2142357342, now seen corresponding path program 42 times [2020-10-26 19:15:48,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:48,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717757499] [2020-10-26 19:15:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:48,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:48,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:15:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:54,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:54,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:54,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717757499] [2020-10-26 19:15:54,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:54,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:15:54,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160396383] [2020-10-26 19:15:54,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:15:54,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:15:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:15:54,244 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 46 states. [2020-10-26 19:15:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:54,518 INFO L93 Difference]: Finished difference Result 162 states and 184 transitions. [2020-10-26 19:15:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:15:54,519 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2020-10-26 19:15:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:54,520 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:15:54,520 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:15:54,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:15:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:15:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-26 19:15:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:15:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2020-10-26 19:15:54,527 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 102 [2020-10-26 19:15:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:54,528 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2020-10-26 19:15:54,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:15:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2020-10-26 19:15:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:15:54,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:54,529 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:54,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:15:54,529 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1504352000, now seen corresponding path program 43 times [2020-10-26 19:15:54,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:54,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156039549] [2020-10-26 19:15:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:54,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:59,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:15:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:00,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:00,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:00,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:00,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:00,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:00,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:00,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:00,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156039549] [2020-10-26 19:16:00,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:00,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:16:00,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332759852] [2020-10-26 19:16:00,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:16:00,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:16:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:16:00,788 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 47 states. [2020-10-26 19:16:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:01,184 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2020-10-26 19:16:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:16:01,185 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2020-10-26 19:16:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:01,187 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:16:01,187 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:16:01,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:16:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:16:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-26 19:16:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:16:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2020-10-26 19:16:01,194 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 104 [2020-10-26 19:16:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:01,194 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2020-10-26 19:16:01,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:16:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2020-10-26 19:16:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:16:01,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:01,195 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:01,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:16:01,195 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1733425630, now seen corresponding path program 44 times [2020-10-26 19:16:01,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:01,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915882088] [2020-10-26 19:16:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:01,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:16:06,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:06,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:16:06,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:16:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:06,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:16:06,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:07,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:07,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:07,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:07,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:07,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:07,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:07,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:07,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:07,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:07,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:07,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915882088] [2020-10-26 19:16:07,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:07,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:16:07,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121510373] [2020-10-26 19:16:07,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:16:07,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:07,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:16:07,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:16:07,560 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand 48 states. [2020-10-26 19:16:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:07,844 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2020-10-26 19:16:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:16:07,845 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2020-10-26 19:16:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:07,846 INFO L225 Difference]: With dead ends: 166 [2020-10-26 19:16:07,846 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:16:07,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:16:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:16:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-26 19:16:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:16:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2020-10-26 19:16:07,853 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 106 [2020-10-26 19:16:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:07,853 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2020-10-26 19:16:07,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:16:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2020-10-26 19:16:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:16:07,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:07,854 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:07,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:16:07,854 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:07,855 INFO L82 PathProgramCache]: Analyzing trace with hash 613561540, now seen corresponding path program 45 times [2020-10-26 19:16:07,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:07,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097918586] [2020-10-26 19:16:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:07,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:07,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:12,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:16:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:14,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:14,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:14,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:14,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097918586] [2020-10-26 19:16:14,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:14,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:16:14,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996306497] [2020-10-26 19:16:14,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:16:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:16:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:16:14,242 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand 49 states. [2020-10-26 19:16:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:14,722 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2020-10-26 19:16:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:16:14,722 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2020-10-26 19:16:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:14,724 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:16:14,724 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:16:14,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:16:14,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:16:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-26 19:16:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-26 19:16:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2020-10-26 19:16:14,731 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 108 [2020-10-26 19:16:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:14,731 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2020-10-26 19:16:14,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:16:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2020-10-26 19:16:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:16:14,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:14,732 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:14,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:16:14,732 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1210401510, now seen corresponding path program 46 times [2020-10-26 19:16:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:14,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158048999] [2020-10-26 19:16:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:14,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:14,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:19,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:19,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:16:19,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:19,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:16:19,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:19,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:16:19,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:19,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:16:19,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:21,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:21,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:21,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:21,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:21,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:21,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:21,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:21,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:21,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:21,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:21,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158048999] [2020-10-26 19:16:21,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:21,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:16:21,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101925284] [2020-10-26 19:16:21,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:16:21,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:21,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:16:21,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:16:21,226 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand 50 states. [2020-10-26 19:16:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:21,623 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2020-10-26 19:16:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:16:21,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2020-10-26 19:16:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:21,625 INFO L225 Difference]: With dead ends: 170 [2020-10-26 19:16:21,625 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:16:21,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:16:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:16:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-26 19:16:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-26 19:16:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2020-10-26 19:16:21,632 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 110 [2020-10-26 19:16:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:21,633 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2020-10-26 19:16:21,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:16:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2020-10-26 19:16:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:16:21,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:21,634 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:21,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:16:21,634 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:21,634 INFO L82 PathProgramCache]: Analyzing trace with hash -752004984, now seen corresponding path program 47 times [2020-10-26 19:16:21,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:21,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460195014] [2020-10-26 19:16:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:21,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:26,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:26,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:16:26,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:26,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:16:26,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:16:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:16:26,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:28,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:28,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460195014] [2020-10-26 19:16:28,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:28,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:16:28,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019819118] [2020-10-26 19:16:28,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:16:28,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:28,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:16:28,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:16:28,126 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand 51 states. [2020-10-26 19:16:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:28,481 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2020-10-26 19:16:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:16:28,481 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2020-10-26 19:16:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:28,482 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:16:28,483 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:16:28,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:16:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:16:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-26 19:16:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:16:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-10-26 19:16:28,489 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 112 [2020-10-26 19:16:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:28,490 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-10-26 19:16:28,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:16:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-10-26 19:16:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:16:28,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:28,491 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:28,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:16:28,491 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1134002774, now seen corresponding path program 48 times [2020-10-26 19:16:28,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:28,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045438715] [2020-10-26 19:16:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:28,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:33,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:16:33,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:35,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:35,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:35,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:35,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:35,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:35,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045438715] [2020-10-26 19:16:35,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:35,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:16:35,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443769988] [2020-10-26 19:16:35,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:16:35,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:16:35,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:16:35,052 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 52 states. [2020-10-26 19:16:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:35,383 INFO L93 Difference]: Finished difference Result 174 states and 196 transitions. [2020-10-26 19:16:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:16:35,383 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2020-10-26 19:16:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:35,384 INFO L225 Difference]: With dead ends: 174 [2020-10-26 19:16:35,384 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:16:35,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:16:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:16:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-26 19:16:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-26 19:16:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2020-10-26 19:16:35,391 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 114 [2020-10-26 19:16:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:35,391 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2020-10-26 19:16:35,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:16:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2020-10-26 19:16:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:16:35,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:35,392 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:35,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:16:35,393 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1133308492, now seen corresponding path program 49 times [2020-10-26 19:16:35,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:35,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689064808] [2020-10-26 19:16:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:35,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:40,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:40,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 19:16:40,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:40,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:16:40,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:40,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:16:40,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:40,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:16:40,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:42,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:42,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:42,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:42,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:42,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689064808] [2020-10-26 19:16:42,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:42,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:16:42,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706329536] [2020-10-26 19:16:42,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:16:42,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:16:42,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:16:42,052 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand 53 states. [2020-10-26 19:16:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:42,398 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2020-10-26 19:16:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:16:42,399 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2020-10-26 19:16:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:42,401 INFO L225 Difference]: With dead ends: 176 [2020-10-26 19:16:42,401 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:16:42,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:16:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:16:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-26 19:16:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-26 19:16:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-10-26 19:16:42,410 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 116 [2020-10-26 19:16:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:42,411 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-10-26 19:16:42,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:16:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-10-26 19:16:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:16:42,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:42,414 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:42,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:16:42,414 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:42,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1823951250, now seen corresponding path program 50 times [2020-10-26 19:16:42,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:42,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178562626] [2020-10-26 19:16:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:47,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:16:47,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:49,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:49,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:49,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178562626] [2020-10-26 19:16:49,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:49,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:16:49,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813776934] [2020-10-26 19:16:49,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:16:49,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:16:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:16:49,151 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 54 states. [2020-10-26 19:16:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:49,573 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2020-10-26 19:16:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:16:49,573 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2020-10-26 19:16:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:49,575 INFO L225 Difference]: With dead ends: 178 [2020-10-26 19:16:49,575 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:16:49,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:16:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:16:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-26 19:16:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-26 19:16:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2020-10-26 19:16:49,582 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 118 [2020-10-26 19:16:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:49,582 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2020-10-26 19:16:49,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:16:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2020-10-26 19:16:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 19:16:49,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:49,583 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:49,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:16:49,583 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash -482213360, now seen corresponding path program 51 times [2020-10-26 19:16:49,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:49,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926403720] [2020-10-26 19:16:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:49,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:54,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:54,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 19:16:54,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:54,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:16:54,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:54,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-26 19:16:54,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:54,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 19:16:54,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:56,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:56,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926403720] [2020-10-26 19:16:56,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:56,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:16:56,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060994835] [2020-10-26 19:16:56,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:16:56,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:56,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:16:56,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:16:56,392 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 55 states. [2020-10-26 19:16:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:56,912 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2020-10-26 19:16:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:16:56,913 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2020-10-26 19:16:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:56,914 INFO L225 Difference]: With dead ends: 180 [2020-10-26 19:16:56,915 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:16:56,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:16:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:16:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-26 19:16:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-26 19:16:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2020-10-26 19:16:56,922 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 120 [2020-10-26 19:16:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:56,923 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2020-10-26 19:16:56,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:16:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2020-10-26 19:16:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:16:56,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:56,924 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:56,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-26 19:16:56,924 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:56,924 INFO L82 PathProgramCache]: Analyzing trace with hash 437710130, now seen corresponding path program 52 times [2020-10-26 19:16:56,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:56,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937740769] [2020-10-26 19:16:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:01,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:17:01,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:01,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:17:01,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-26 19:17:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 19:17:01,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:03,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:03,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:03,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:03,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:03,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:03,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:03,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:03,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:03,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937740769] [2020-10-26 19:17:03,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:03,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-26 19:17:03,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656064135] [2020-10-26 19:17:03,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-26 19:17:03,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-26 19:17:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:17:03,746 INFO L87 Difference]: Start difference. First operand 145 states and 156 transitions. Second operand 56 states. [2020-10-26 19:17:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:04,298 INFO L93 Difference]: Finished difference Result 182 states and 204 transitions. [2020-10-26 19:17:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-26 19:17:04,299 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2020-10-26 19:17:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:04,300 INFO L225 Difference]: With dead ends: 182 [2020-10-26 19:17:04,301 INFO L226 Difference]: Without dead ends: 148 [2020-10-26 19:17:04,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:17:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-26 19:17:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-26 19:17:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-26 19:17:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 158 transitions. [2020-10-26 19:17:04,307 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 158 transitions. Word has length 122 [2020-10-26 19:17:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:04,308 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 158 transitions. [2020-10-26 19:17:04,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-26 19:17:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 158 transitions. [2020-10-26 19:17:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:17:04,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:04,309 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:04,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-26 19:17:04,309 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -279078956, now seen corresponding path program 53 times [2020-10-26 19:17:04,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:04,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982897442] [2020-10-26 19:17:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:09,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:17:09,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:09,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:17:09,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-26 19:17:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 19:17:09,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:11,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982897442] [2020-10-26 19:17:11,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:11,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:17:11,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240656759] [2020-10-26 19:17:11,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:17:11,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:11,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:17:11,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:17:11,170 INFO L87 Difference]: Start difference. First operand 147 states and 158 transitions. Second operand 57 states. [2020-10-26 19:17:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:11,727 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2020-10-26 19:17:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:17:11,727 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2020-10-26 19:17:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:11,729 INFO L225 Difference]: With dead ends: 184 [2020-10-26 19:17:11,729 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:17:11,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:17:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:17:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-26 19:17:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-26 19:17:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2020-10-26 19:17:11,736 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 124 [2020-10-26 19:17:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:11,737 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2020-10-26 19:17:11,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:17:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2020-10-26 19:17:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 19:17:11,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:11,738 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:11,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-26 19:17:11,738 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1918623242, now seen corresponding path program 54 times [2020-10-26 19:17:11,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:11,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592311714] [2020-10-26 19:17:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:11,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:16,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:16,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:17:16,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:16,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:17:16,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-26 19:17:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 19:17:16,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:18,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:18,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:18,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:18,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:18,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:18,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:18,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:18,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:18,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:18,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:18,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:18,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592311714] [2020-10-26 19:17:18,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:18,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-26 19:17:18,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817154200] [2020-10-26 19:17:18,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-26 19:17:18,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-26 19:17:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:17:18,730 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 58 states. [2020-10-26 19:17:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:19,082 INFO L93 Difference]: Finished difference Result 186 states and 208 transitions. [2020-10-26 19:17:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-26 19:17:19,083 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2020-10-26 19:17:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:19,084 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:17:19,085 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:17:19,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:17:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:17:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-26 19:17:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-26 19:17:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2020-10-26 19:17:19,091 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 126 [2020-10-26 19:17:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:19,092 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2020-10-26 19:17:19,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-26 19:17:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2020-10-26 19:17:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:17:19,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:19,093 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:19,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-26 19:17:19,093 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1267684456, now seen corresponding path program 55 times [2020-10-26 19:17:19,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:19,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382463370] [2020-10-26 19:17:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:19,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:19,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:24,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 19:17:24,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:26,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:26,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:26,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:26,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:26,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:26,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:26,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:26,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:26,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:26,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:26,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382463370] [2020-10-26 19:17:26,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:26,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:17:26,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794269527] [2020-10-26 19:17:26,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:17:26,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:26,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:17:26,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:17:26,217 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand 59 states. [2020-10-26 19:17:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:26,829 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2020-10-26 19:17:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:17:26,829 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2020-10-26 19:17:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:26,831 INFO L225 Difference]: With dead ends: 188 [2020-10-26 19:17:26,831 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:17:26,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:17:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:17:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-26 19:17:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-26 19:17:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2020-10-26 19:17:26,837 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 128 [2020-10-26 19:17:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:26,838 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2020-10-26 19:17:26,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:17:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2020-10-26 19:17:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:17:26,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:26,839 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:26,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-26 19:17:26,839 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1514230970, now seen corresponding path program 56 times [2020-10-26 19:17:26,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:26,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310361386] [2020-10-26 19:17:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:26,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:27,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:31,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 19:17:31,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:34,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:34,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:34,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310361386] [2020-10-26 19:17:34,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:34,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-26 19:17:34,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018355039] [2020-10-26 19:17:34,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-26 19:17:34,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:34,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-26 19:17:34,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:17:34,062 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand 60 states. [2020-10-26 19:17:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:34,678 INFO L93 Difference]: Finished difference Result 190 states and 212 transitions. [2020-10-26 19:17:34,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-26 19:17:34,679 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2020-10-26 19:17:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:34,680 INFO L225 Difference]: With dead ends: 190 [2020-10-26 19:17:34,680 INFO L226 Difference]: Without dead ends: 156 [2020-10-26 19:17:34,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:17:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-26 19:17:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-26 19:17:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-26 19:17:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2020-10-26 19:17:34,687 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 130 [2020-10-26 19:17:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:34,688 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2020-10-26 19:17:34,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-26 19:17:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2020-10-26 19:17:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:17:34,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:34,689 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:34,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-26 19:17:34,689 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash -829670052, now seen corresponding path program 57 times [2020-10-26 19:17:34,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:34,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157378682] [2020-10-26 19:17:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:34,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:34,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking...