/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-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:46:10,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:46:10,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:46:10,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:46:10,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:46:10,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:46:10,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:46:10,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:46:10,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:46:10,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:46:10,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:46:10,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:46:10,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:46:10,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:46:10,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:46:10,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:46:10,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:46:10,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:46:10,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:46:10,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:46:10,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:46:10,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:46:10,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:46:10,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:46:10,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:46:10,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:46:10,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:46:10,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:46:10,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:46:10,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-26 19:46:10,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:46:10,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:46:10,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:46:10,657 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 19:46:10,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:46:10,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:46:10,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:46:10,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:46:10,719 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:46:10,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:46:10,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:46:10,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:46:10,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:46:10,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:46:10,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:46:10,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:46:10,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:46:10,722 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:46:10,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:46:10,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:46:10,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:46:10,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:46:10,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:46:10,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:46:10,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:46:10,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:46:10,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:46:10,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:46:10,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:46:10,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:46:10,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:46:10,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:46:10,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:46:10,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:46:11,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:46:11,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:46:11,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:46:11,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:46:11,212 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:46:11,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-26 19:46:11,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7868ada01/68a47d05e7054110b25ebf39e1fdb8b3/FLAG17d33fa7a [2020-10-26 19:46:12,002 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:46:12,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-26 19:46:12,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7868ada01/68a47d05e7054110b25ebf39e1fdb8b3/FLAG17d33fa7a [2020-10-26 19:46:12,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7868ada01/68a47d05e7054110b25ebf39e1fdb8b3 [2020-10-26 19:46:12,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:46:12,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:46:12,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:46:12,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:46:12,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:46:12,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8eb1bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12, skipping insertion in model container [2020-10-26 19:46:12,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:46:12,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:46:12,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:46:12,569 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:46:12,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:46:12,624 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:46:12,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12 WrapperNode [2020-10-26 19:46:12,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:46:12,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:46:12,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:46:12,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:46:12,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (1/1) ... [2020-10-26 19:46:12,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:46:12,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:46:12,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:46:12,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:46:12,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (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 19:46:12,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:46:12,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:46:12,767 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:46:12,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:46:12,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:46:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:46:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:46:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:46:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:46:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:46:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:46:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:46:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:46:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:46:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:46:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:46:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:46:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:46:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:46:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:46:13,137 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:46:13,137 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:46:13,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:46:13 BoogieIcfgContainer [2020-10-26 19:46:13,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:46:13,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:46:13,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:46:13,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:46:13,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:46:12" (1/3) ... [2020-10-26 19:46:13,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b8728d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:46:13, skipping insertion in model container [2020-10-26 19:46:13,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:46:12" (2/3) ... [2020-10-26 19:46:13,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b8728d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:46:13, skipping insertion in model container [2020-10-26 19:46:13,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:46:13" (3/3) ... [2020-10-26 19:46:13,152 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2020-10-26 19:46:13,168 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:46:13,175 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:46:13,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:46:13,230 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:46:13,231 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:46:13,231 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:46:13,231 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:46:13,231 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:46:13,231 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:46:13,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:46:13,232 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:46:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-26 19:46:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:46:13,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:13,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:13,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1680670433, now seen corresponding path program 1 times [2020-10-26 19:46:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:13,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670980235] [2020-10-26 19:46:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:13,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:13,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:13,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:13,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:46:13,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-26 19:46:13,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:46:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:13,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:46:14,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:14,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:14,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:14,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:14,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:46:14,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:14,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:14,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:14,108 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 19:46:14,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670980235] [2020-10-26 19:46:14,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:46:14,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:46:14,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567773429] [2020-10-26 19:46:14,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:46:14,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:46:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:46:14,136 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-26 19:46:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:14,251 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-26 19:46:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:46:14,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-26 19:46:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:14,261 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:46:14,261 INFO L226 Difference]: Without dead ends: 26 [2020-10-26 19:46:14,265 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 19:46:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-26 19:46:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-26 19:46:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:46:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-26 19:46:14,309 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-26 19:46:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:14,310 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-26 19:46:14,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:46:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-26 19:46:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:46:14,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:14,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:14,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:46:14,312 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1259313609, now seen corresponding path program 1 times [2020-10-26 19:46:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:14,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987179119] [2020-10-26 19:46:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:14,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:46:14,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:14,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-26 19:46:14,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:14,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:14,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:14,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:46:14,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:14,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:14,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:14,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:46:14,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:14,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:46:14,562 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 19:46:14,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987179119] [2020-10-26 19:46:14,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:46:14,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:46:14,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857960878] [2020-10-26 19:46:14,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:46:14,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:14,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:46:14,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:46:14,571 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-26 19:46:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:14,693 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-26 19:46:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:46:14,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-26 19:46:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:14,695 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:46:14,695 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:46:14,697 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 19:46:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:46:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-26 19:46:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:46:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-26 19:46:14,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-26 19:46:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:14,707 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-26 19:46:14,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:46:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-26 19:46:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:46:14,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:14,709 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:14,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:46:14,710 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1691183649, now seen corresponding path program 1 times [2020-10-26 19:46:14,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:14,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341186245] [2020-10-26 19:46:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:14,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:15,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:15,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:15,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:46:15,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:46:15,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-26 19:46:15,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:15,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:46:15,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:15,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:46:15,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:15,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:15,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:15,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:15,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:15,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:46:15,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:15,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:16,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341186245] [2020-10-26 19:46:16,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:46:16,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 19:46:16,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102297766] [2020-10-26 19:46:16,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:46:16,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:16,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:46:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:46:16,009 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-26 19:46:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:16,162 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-26 19:46:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:46:16,163 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-26 19:46:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:16,165 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:46:16,165 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:46:16,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:46:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:46:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-26 19:46:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:46:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-26 19:46:16,175 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 24 [2020-10-26 19:46:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:16,175 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-26 19:46:16,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:46:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-26 19:46:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:46:16,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:16,177 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:16,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:46:16,177 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1015435745, now seen corresponding path program 1 times [2020-10-26 19:46:16,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:16,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542948524] [2020-10-26 19:46:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:16,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:16,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:46:16,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:16,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 19:46:16,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:16,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:46:16,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:16,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:46:16,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:16,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:16,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:16,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:16,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:16,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:46:16,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:16,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:16,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:16,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:16,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:46:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:46:16,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542948524] [2020-10-26 19:46:16,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:16,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:46:16,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999111824] [2020-10-26 19:46:16,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:46:16,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:16,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:46:16,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:46:16,404 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-26 19:46:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:16,516 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-10-26 19:46:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:46:16,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-26 19:46:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:16,518 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:46:16,518 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:46:16,519 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 19:46:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:46:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-26 19:46:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:46:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-26 19:46:16,527 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 24 [2020-10-26 19:46:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:16,528 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-26 19:46:16,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:46:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-26 19:46:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:46:16,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:16,529 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:16,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:46:16,530 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1480554761, now seen corresponding path program 2 times [2020-10-26 19:46:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:16,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345507583] [2020-10-26 19:46:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:16,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:16,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:46:16,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:16,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-26 19:46:16,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:16,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:46:16,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:46:16,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:16,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:16,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:16,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:16,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:16,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:16,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:46:16,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345507583] [2020-10-26 19:46:16,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:16,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:46:16,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619506453] [2020-10-26 19:46:16,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:46:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:46:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:46:16,877 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2020-10-26 19:46:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:17,011 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-26 19:46:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:46:17,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-26 19:46:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:17,013 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:46:17,013 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:46:17,013 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 19:46:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:46:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-26 19:46:17,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:46:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-26 19:46:17,022 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 32 [2020-10-26 19:46:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:17,023 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-26 19:46:17,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:46:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-26 19:46:17,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:46:17,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:17,024 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:17,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:46:17,025 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:17,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:17,025 INFO L82 PathProgramCache]: Analyzing trace with hash -999429343, now seen corresponding path program 3 times [2020-10-26 19:46:17,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:17,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103809850] [2020-10-26 19:46:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:17,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:17,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:17,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:17,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:46:17,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:17,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-26 19:46:17,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:46:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:46:17,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:17,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:17,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:17,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:17,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:17,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:17,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:17,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:17,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:17,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:17,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:17,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:46:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103809850] [2020-10-26 19:46:17,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:17,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:46:17,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213012745] [2020-10-26 19:46:17,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:46:17,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:46:17,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:46:17,580 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 7 states. [2020-10-26 19:46:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:17,752 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-10-26 19:46:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:46:17,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-26 19:46:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:17,754 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:46:17,754 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:46:17,755 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 19:46:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:46:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-10-26 19:46:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:46:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-10-26 19:46:17,764 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 40 [2020-10-26 19:46:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:17,765 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-10-26 19:46:17,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:46:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-10-26 19:46:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:46:17,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:17,767 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:17,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:46:17,768 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1956259913, now seen corresponding path program 4 times [2020-10-26 19:46:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:17,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239280854] [2020-10-26 19:46:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:17,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:17,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:18,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:18,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:46:18,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:18,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-26 19:46:18,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:46:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:18,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:46:18,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:18,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:18,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:18,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:18,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:18,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:46:18,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:18,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:46:18,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239280854] [2020-10-26 19:46:18,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:18,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:46:18,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945393768] [2020-10-26 19:46:18,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:46:18,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:46:18,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:46:18,690 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 8 states. [2020-10-26 19:46:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:18,857 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2020-10-26 19:46:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:46:18,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-26 19:46:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:18,859 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:46:18,859 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:46:18,860 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 19:46:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:46:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-10-26 19:46:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:46:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-26 19:46:18,869 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 48 [2020-10-26 19:46:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:18,870 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-26 19:46:18,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:46:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-26 19:46:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:46:18,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:18,871 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:18,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:46:18,872 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1039248287, now seen corresponding path program 5 times [2020-10-26 19:46:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:18,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198645342] [2020-10-26 19:46:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:18,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:20,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:20,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:46:20,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1342 [2020-10-26 19:46:20,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:46:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:46:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:46:20,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:20,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:20,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:20,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:20,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:20,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:46:20,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:20,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:20,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:20,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:20,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-26 19:46:20,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198645342] [2020-10-26 19:46:20,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:20,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:46:20,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267279863] [2020-10-26 19:46:20,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:46:20,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:20,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:46:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:46:20,370 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 9 states. [2020-10-26 19:46:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:20,589 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2020-10-26 19:46:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:46:20,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-26 19:46:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:20,591 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:46:20,592 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:46:20,593 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 19:46:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:46:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2020-10-26 19:46:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:46:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-10-26 19:46:20,613 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 56 [2020-10-26 19:46:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:20,613 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-10-26 19:46:20,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:46:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2020-10-26 19:46:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:46:20,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:20,620 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:20,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:46:20,622 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1111730057, now seen corresponding path program 6 times [2020-10-26 19:46:20,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:20,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860315802] [2020-10-26 19:46:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:22,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:22,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:46:22,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:22,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1844 [2020-10-26 19:46:22,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:46:22,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:46:22,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:46:22,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:22,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:22,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:22,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:22,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:22,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:22,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:22,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:46:22,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860315802] [2020-10-26 19:46:22,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:22,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:46:22,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429456500] [2020-10-26 19:46:22,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:46:22,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:22,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:46:22,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:46:22,628 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand 10 states. [2020-10-26 19:46:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:22,849 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2020-10-26 19:46:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:46:22,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-26 19:46:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:22,851 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:46:22,851 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:46:22,852 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 19:46:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:46:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-26 19:46:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:46:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2020-10-26 19:46:22,860 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 64 [2020-10-26 19:46:22,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:22,861 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2020-10-26 19:46:22,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:46:22,861 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2020-10-26 19:46:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:46:22,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:22,862 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:22,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:46:22,863 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:22,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2113172063, now seen corresponding path program 7 times [2020-10-26 19:46:22,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:22,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032055907] [2020-10-26 19:46:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:22,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:22,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:25,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:25,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:46:25,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:25,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2317 [2020-10-26 19:46:25,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:25,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:46:25,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:25,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:46:25,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:25,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:25,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:25,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:25,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:25,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:46:25,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:25,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:25,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:25,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:25,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-26 19:46:25,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032055907] [2020-10-26 19:46:25,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:25,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:46:25,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368894962] [2020-10-26 19:46:25,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:46:25,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:46:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:46:25,364 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand 11 states. [2020-10-26 19:46:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:25,622 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2020-10-26 19:46:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:46:25,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-26 19:46:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:25,624 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:46:25,624 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:46:25,625 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 19:46:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:46:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2020-10-26 19:46:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:46:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2020-10-26 19:46:25,644 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 72 [2020-10-26 19:46:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:25,645 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2020-10-26 19:46:25,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:46:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2020-10-26 19:46:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:46:25,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:25,650 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:25,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:46:25,650 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:25,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:25,651 INFO L82 PathProgramCache]: Analyzing trace with hash -945813193, now seen corresponding path program 8 times [2020-10-26 19:46:25,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:25,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833766665] [2020-10-26 19:46:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:28,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:28,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:46:28,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:28,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-26 19:46:28,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:28,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:46:28,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:28,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:46:28,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:28,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:28,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:28,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:28,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:28,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:28,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:46:28,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:28,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:28,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:28,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:28,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 19:46:28,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833766665] [2020-10-26 19:46:28,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:28,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:46:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809009823] [2020-10-26 19:46:28,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:46:28,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:46:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:46:28,648 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand 12 states. [2020-10-26 19:46:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:28,915 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2020-10-26 19:46:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:46:28,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-10-26 19:46:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:28,917 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:46:28,917 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:46:28,919 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 19:46:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:46:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-10-26 19:46:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:46:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2020-10-26 19:46:28,934 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 80 [2020-10-26 19:46:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:28,934 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2020-10-26 19:46:28,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:46:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2020-10-26 19:46:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:46:28,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:28,938 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:28,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:46:28,938 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:28,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1175033569, now seen corresponding path program 9 times [2020-10-26 19:46:28,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:28,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637369898] [2020-10-26 19:46:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:28,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:29,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:32,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:32,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:46:32,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3529 [2020-10-26 19:46:32,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:46:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:46:32,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:32,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:32,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:32,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:32,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:32,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:32,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:32,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:32,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:32,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:32,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:32,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 19:46:32,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637369898] [2020-10-26 19:46:32,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:32,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:46:32,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195613576] [2020-10-26 19:46:32,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:46:32,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:32,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:46:32,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:32,670 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand 13 states. [2020-10-26 19:46:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:32,960 INFO L93 Difference]: Finished difference Result 178 states and 216 transitions. [2020-10-26 19:46:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:46:32,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2020-10-26 19:46:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:32,961 INFO L225 Difference]: With dead ends: 178 [2020-10-26 19:46:32,962 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:46:32,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:46:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-10-26 19:46:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:46:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2020-10-26 19:46:32,972 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 88 [2020-10-26 19:46:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:32,973 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2020-10-26 19:46:32,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:46:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2020-10-26 19:46:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:46:32,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:32,979 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:32,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:46:32,980 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 485288439, now seen corresponding path program 10 times [2020-10-26 19:46:32,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:32,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500902503] [2020-10-26 19:46:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:33,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:36,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:36,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:46:36,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3830 [2020-10-26 19:46:36,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:46:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:46:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:37,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:37,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:37,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:37,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:37,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:46:37,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-26 19:46:37,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500902503] [2020-10-26 19:46:37,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:37,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:46:37,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534821884] [2020-10-26 19:46:37,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:46:37,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:46:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:46:37,054 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand 14 states. [2020-10-26 19:46:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:37,406 INFO L93 Difference]: Finished difference Result 192 states and 233 transitions. [2020-10-26 19:46:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:46:37,408 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2020-10-26 19:46:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:37,409 INFO L225 Difference]: With dead ends: 192 [2020-10-26 19:46:37,409 INFO L226 Difference]: Without dead ends: 149 [2020-10-26 19:46:37,410 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 19:46:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-26 19:46:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-10-26 19:46:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-26 19:46:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2020-10-26 19:46:37,418 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 96 [2020-10-26 19:46:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:37,418 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2020-10-26 19:46:37,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:46:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2020-10-26 19:46:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:46:37,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:37,419 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:37,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:46:37,420 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:37,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2069073887, now seen corresponding path program 11 times [2020-10-26 19:46:37,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:37,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631722678] [2020-10-26 19:46:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:37,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:40,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:40,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:46:40,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:40,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2607 [2020-10-26 19:46:40,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:40,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:46:40,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:40,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:46:40,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:40,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:40,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:40,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:40,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:40,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:46:40,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:40,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:40,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:46:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-26 19:46:40,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631722678] [2020-10-26 19:46:40,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:40,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:46:40,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196669625] [2020-10-26 19:46:40,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:46:40,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:40,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:46:40,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:46:40,323 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand 15 states. [2020-10-26 19:46:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:40,807 INFO L93 Difference]: Finished difference Result 206 states and 250 transitions. [2020-10-26 19:46:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:46:40,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-26 19:46:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:40,810 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:46:40,810 INFO L226 Difference]: Without dead ends: 160 [2020-10-26 19:46:40,811 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 19:46:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-26 19:46:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2020-10-26 19:46:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-26 19:46:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 190 transitions. [2020-10-26 19:46:40,825 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 190 transitions. Word has length 104 [2020-10-26 19:46:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:40,826 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 190 transitions. [2020-10-26 19:46:40,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:46:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 190 transitions. [2020-10-26 19:46:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:46:40,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:40,832 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:40,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:46:40,833 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash -595658057, now seen corresponding path program 12 times [2020-10-26 19:46:40,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:40,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509180504] [2020-10-26 19:46:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:40,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:41,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:43,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:43,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:46:43,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:43,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2834 [2020-10-26 19:46:43,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:46:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:46:43,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:43,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:43,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:43,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:43,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:43,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:43,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:43,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-26 19:46:43,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509180504] [2020-10-26 19:46:43,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:43,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:46:43,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804527630] [2020-10-26 19:46:43,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:46:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:46:43,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:46:43,956 INFO L87 Difference]: Start difference. First operand 152 states and 190 transitions. Second operand 16 states. [2020-10-26 19:46:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:44,389 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2020-10-26 19:46:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:46:44,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-10-26 19:46:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:44,392 INFO L225 Difference]: With dead ends: 220 [2020-10-26 19:46:44,392 INFO L226 Difference]: Without dead ends: 171 [2020-10-26 19:46:44,393 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 19:46:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-26 19:46:44,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2020-10-26 19:46:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-26 19:46:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 204 transitions. [2020-10-26 19:46:44,404 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 204 transitions. Word has length 112 [2020-10-26 19:46:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:44,405 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 204 transitions. [2020-10-26 19:46:44,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:46:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 204 transitions. [2020-10-26 19:46:44,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 19:46:44,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:44,408 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:44,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:46:44,409 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash 697833825, now seen corresponding path program 13 times [2020-10-26 19:46:44,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:44,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548268378] [2020-10-26 19:46:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:44,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:44,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:47,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:47,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 19:46:47,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:47,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-26 19:46:47,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:47,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:46:47,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:47,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 19:46:47,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:47,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:47,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:47,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:47,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:47,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:47,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:47,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:47,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:47,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:47,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:47,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-26 19:46:47,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548268378] [2020-10-26 19:46:47,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:47,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:46:47,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045062971] [2020-10-26 19:46:47,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:46:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:46:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:46:47,589 INFO L87 Difference]: Start difference. First operand 163 states and 204 transitions. Second operand 17 states. [2020-10-26 19:46:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:48,056 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2020-10-26 19:46:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:46:48,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-10-26 19:46:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:48,057 INFO L225 Difference]: With dead ends: 234 [2020-10-26 19:46:48,058 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:46:48,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:46:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:46:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-10-26 19:46:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:46:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 218 transitions. [2020-10-26 19:46:48,068 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 218 transitions. Word has length 120 [2020-10-26 19:46:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:48,068 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 218 transitions. [2020-10-26 19:46:48,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:46:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 218 transitions. [2020-10-26 19:46:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:46:48,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:48,070 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:48,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:46:48,070 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1875756169, now seen corresponding path program 14 times [2020-10-26 19:46:48,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318329915] [2020-10-26 19:46:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:48,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:48,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:51,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:51,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:46:51,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:51,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3006 [2020-10-26 19:46:51,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:51,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:46:51,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:51,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:46:51,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:51,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:51,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:51,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-26 19:46:51,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318329915] [2020-10-26 19:46:51,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:51,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:46:51,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709286674] [2020-10-26 19:46:51,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:46:51,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:46:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:46:51,397 INFO L87 Difference]: Start difference. First operand 174 states and 218 transitions. Second operand 18 states. [2020-10-26 19:46:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:51,864 INFO L93 Difference]: Finished difference Result 248 states and 301 transitions. [2020-10-26 19:46:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:46:51,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 128 [2020-10-26 19:46:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:51,867 INFO L225 Difference]: With dead ends: 248 [2020-10-26 19:46:51,867 INFO L226 Difference]: Without dead ends: 193 [2020-10-26 19:46:51,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:46:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-26 19:46:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 185. [2020-10-26 19:46:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-26 19:46:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 232 transitions. [2020-10-26 19:46:51,879 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 232 transitions. Word has length 128 [2020-10-26 19:46:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:51,880 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 232 transitions. [2020-10-26 19:46:51,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:46:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 232 transitions. [2020-10-26 19:46:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-26 19:46:51,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:51,882 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:51,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:46:51,882 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash -714042719, now seen corresponding path program 15 times [2020-10-26 19:46:51,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:51,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342195135] [2020-10-26 19:46:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:52,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:55,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:55,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 19:46:55,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:55,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3544 [2020-10-26 19:46:55,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:46:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:55,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 19:46:55,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:55,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:55,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:55,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:55,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:55,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:55,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:55,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:55,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-26 19:46:55,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342195135] [2020-10-26 19:46:55,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:55,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:46:55,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147228396] [2020-10-26 19:46:55,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:46:55,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:55,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:46:55,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:46:55,768 INFO L87 Difference]: Start difference. First operand 185 states and 232 transitions. Second operand 19 states. [2020-10-26 19:46:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:56,325 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2020-10-26 19:46:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:46:56,326 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-10-26 19:46:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:56,328 INFO L225 Difference]: With dead ends: 262 [2020-10-26 19:46:56,328 INFO L226 Difference]: Without dead ends: 204 [2020-10-26 19:46:56,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:46:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-26 19:46:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 196. [2020-10-26 19:46:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-26 19:46:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 246 transitions. [2020-10-26 19:46:56,339 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 246 transitions. Word has length 136 [2020-10-26 19:46:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:56,339 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 246 transitions. [2020-10-26 19:46:56,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:46:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 246 transitions. [2020-10-26 19:46:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-26 19:46:56,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:56,342 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:56,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:46:56,342 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:56,343 INFO L82 PathProgramCache]: Analyzing trace with hash -320689097, now seen corresponding path program 16 times [2020-10-26 19:46:56,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:56,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334326615] [2020-10-26 19:46:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:00,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4069 [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:47:00,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:00,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:00,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:00,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-26 19:47:00,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334326615] [2020-10-26 19:47:00,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:00,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:47:00,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446208043] [2020-10-26 19:47:00,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:47:00,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:00,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:47:00,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:47:00,772 INFO L87 Difference]: Start difference. First operand 196 states and 246 transitions. Second operand 20 states. [2020-10-26 19:47:01,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:01,327 INFO L93 Difference]: Finished difference Result 276 states and 335 transitions. [2020-10-26 19:47:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:47:01,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 144 [2020-10-26 19:47:01,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:01,330 INFO L225 Difference]: With dead ends: 276 [2020-10-26 19:47:01,331 INFO L226 Difference]: Without dead ends: 215 [2020-10-26 19:47:01,332 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 19:47:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-26 19:47:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-10-26 19:47:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-26 19:47:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2020-10-26 19:47:01,357 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 144 [2020-10-26 19:47:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:01,357 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2020-10-26 19:47:01,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:47:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2020-10-26 19:47:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-26 19:47:01,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:01,367 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:01,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:47:01,367 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash 500816865, now seen corresponding path program 17 times [2020-10-26 19:47:01,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:01,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878868546] [2020-10-26 19:47:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:01,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:01,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:06,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:06,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-26 19:47:06,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:06,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4753 [2020-10-26 19:47:06,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:06,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:47:06,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 19:47:06,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:06,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:06,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:06,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:06,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:06,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:06,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:06,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:06,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-26 19:47:06,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878868546] [2020-10-26 19:47:06,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:06,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:47:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628220472] [2020-10-26 19:47:06,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:47:06,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:47:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:47:06,555 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand 21 states. [2020-10-26 19:47:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:07,094 INFO L93 Difference]: Finished difference Result 290 states and 352 transitions. [2020-10-26 19:47:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:47:07,095 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2020-10-26 19:47:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:07,097 INFO L225 Difference]: With dead ends: 290 [2020-10-26 19:47:07,098 INFO L226 Difference]: Without dead ends: 226 [2020-10-26 19:47:07,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:47:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-26 19:47:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 218. [2020-10-26 19:47:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-26 19:47:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 274 transitions. [2020-10-26 19:47:07,109 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 274 transitions. Word has length 152 [2020-10-26 19:47:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:07,110 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 274 transitions. [2020-10-26 19:47:07,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:47:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 274 transitions. [2020-10-26 19:47:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-26 19:47:07,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:07,113 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:07,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:47:07,113 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1838396169, now seen corresponding path program 18 times [2020-10-26 19:47:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:07,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875100547] [2020-10-26 19:47:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:07,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:07,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:12,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:12,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-26 19:47:12,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:12,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:47:12,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:12,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:47:12,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:12,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:47:12,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:12,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:12,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:12,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:12,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-26 19:47:12,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875100547] [2020-10-26 19:47:12,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:12,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:47:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132669140] [2020-10-26 19:47:12,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:47:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:12,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:47:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:47:12,529 INFO L87 Difference]: Start difference. First operand 218 states and 274 transitions. Second operand 22 states. [2020-10-26 19:47:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:13,132 INFO L93 Difference]: Finished difference Result 304 states and 369 transitions. [2020-10-26 19:47:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:47:13,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 160 [2020-10-26 19:47:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:13,134 INFO L225 Difference]: With dead ends: 304 [2020-10-26 19:47:13,134 INFO L226 Difference]: Without dead ends: 237 [2020-10-26 19:47:13,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:47:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-26 19:47:13,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2020-10-26 19:47:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-26 19:47:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 288 transitions. [2020-10-26 19:47:13,151 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 288 transitions. Word has length 160 [2020-10-26 19:47:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:13,151 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 288 transitions. [2020-10-26 19:47:13,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:47:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 288 transitions. [2020-10-26 19:47:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-26 19:47:13,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:13,153 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:13,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:47:13,154 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -847776479, now seen corresponding path program 19 times [2020-10-26 19:47:13,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:13,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068085256] [2020-10-26 19:47:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:18,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:18,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-26 19:47:18,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:47:18,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:47:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:18,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 19:47:18,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:18,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:18,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:18,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:47:18,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:18,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-26 19:47:18,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068085256] [2020-10-26 19:47:18,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:18,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:47:18,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958063459] [2020-10-26 19:47:18,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:47:18,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:18,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:47:18,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:47:18,659 INFO L87 Difference]: Start difference. First operand 229 states and 288 transitions. Second operand 23 states. [2020-10-26 19:47:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:19,362 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2020-10-26 19:47:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:47:19,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 168 [2020-10-26 19:47:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:19,368 INFO L225 Difference]: With dead ends: 318 [2020-10-26 19:47:19,368 INFO L226 Difference]: Without dead ends: 248 [2020-10-26 19:47:19,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:47:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-26 19:47:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-26 19:47:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-26 19:47:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 302 transitions. [2020-10-26 19:47:19,381 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 302 transitions. Word has length 168 [2020-10-26 19:47:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:19,381 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 302 transitions. [2020-10-26 19:47:19,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:47:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 302 transitions. [2020-10-26 19:47:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-26 19:47:19,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:19,384 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:19,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:47:19,384 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:19,384 INFO L82 PathProgramCache]: Analyzing trace with hash -877978185, now seen corresponding path program 20 times [2020-10-26 19:47:19,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:19,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202196110] [2020-10-26 19:47:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:19,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:24,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:24,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-26 19:47:24,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:47:24,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:47:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:47:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:24,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:24,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-26 19:47:24,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202196110] [2020-10-26 19:47:24,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:24,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:47:24,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016083010] [2020-10-26 19:47:24,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:47:24,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:24,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:47:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:47:24,926 INFO L87 Difference]: Start difference. First operand 240 states and 302 transitions. Second operand 24 states. [2020-10-26 19:47:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:25,673 INFO L93 Difference]: Finished difference Result 332 states and 403 transitions. [2020-10-26 19:47:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:47:25,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 176 [2020-10-26 19:47:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:25,676 INFO L225 Difference]: With dead ends: 332 [2020-10-26 19:47:25,676 INFO L226 Difference]: Without dead ends: 259 [2020-10-26 19:47:25,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:47:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-26 19:47:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 251. [2020-10-26 19:47:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-26 19:47:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 316 transitions. [2020-10-26 19:47:25,694 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 316 transitions. Word has length 176 [2020-10-26 19:47:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:25,694 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 316 transitions. [2020-10-26 19:47:25,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:47:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 316 transitions. [2020-10-26 19:47:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-26 19:47:25,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:25,696 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:25,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:47:25,697 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash 602857057, now seen corresponding path program 21 times [2020-10-26 19:47:25,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:25,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943788964] [2020-10-26 19:47:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:25,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:26,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:30,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:30,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 19:47:30,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:30,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:47:30,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:47:30,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:30,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-26 19:47:30,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:31,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-26 19:47:31,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943788964] [2020-10-26 19:47:31,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:31,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:47:31,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865993862] [2020-10-26 19:47:31,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:47:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:47:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:47:31,206 INFO L87 Difference]: Start difference. First operand 251 states and 316 transitions. Second operand 25 states. [2020-10-26 19:47:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:31,923 INFO L93 Difference]: Finished difference Result 346 states and 420 transitions. [2020-10-26 19:47:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:47:31,923 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 184 [2020-10-26 19:47:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:31,926 INFO L225 Difference]: With dead ends: 346 [2020-10-26 19:47:31,926 INFO L226 Difference]: Without dead ends: 270 [2020-10-26 19:47:31,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:47:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-26 19:47:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2020-10-26 19:47:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-26 19:47:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 330 transitions. [2020-10-26 19:47:31,939 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 330 transitions. Word has length 184 [2020-10-26 19:47:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:31,940 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 330 transitions. [2020-10-26 19:47:31,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:47:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 330 transitions. [2020-10-26 19:47:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-26 19:47:31,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:31,941 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:31,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:47:31,942 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:31,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1316691575, now seen corresponding path program 22 times [2020-10-26 19:47:31,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:31,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531854368] [2020-10-26 19:47:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:31,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:32,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:36,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:36,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-26 19:47:36,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:36,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:47:36,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:47:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 19:47:36,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:37,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:37,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:37,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:37,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:37,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:47:37,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:37,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:37,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-26 19:47:37,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531854368] [2020-10-26 19:47:37,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:37,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:47:37,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607516254] [2020-10-26 19:47:37,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:47:37,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:37,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:47:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:47:37,539 INFO L87 Difference]: Start difference. First operand 262 states and 330 transitions. Second operand 26 states. [2020-10-26 19:47:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:38,289 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2020-10-26 19:47:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:47:38,289 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 192 [2020-10-26 19:47:38,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:38,291 INFO L225 Difference]: With dead ends: 360 [2020-10-26 19:47:38,291 INFO L226 Difference]: Without dead ends: 281 [2020-10-26 19:47:38,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:47:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-26 19:47:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 273. [2020-10-26 19:47:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-26 19:47:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 344 transitions. [2020-10-26 19:47:38,305 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 344 transitions. Word has length 192 [2020-10-26 19:47:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:38,306 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 344 transitions. [2020-10-26 19:47:38,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:47:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 344 transitions. [2020-10-26 19:47:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-26 19:47:38,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:38,308 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:38,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:47:38,308 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash 367171489, now seen corresponding path program 23 times [2020-10-26 19:47:38,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:38,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622856393] [2020-10-26 19:47:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:38,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:38,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:43,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 19:47:43,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:43,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:43,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:43,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:43,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:43,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:47:43,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:43,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-26 19:47:44,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622856393] [2020-10-26 19:47:44,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:44,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:47:44,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047420104] [2020-10-26 19:47:44,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:47:44,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:47:44,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:47:44,076 INFO L87 Difference]: Start difference. First operand 273 states and 344 transitions. Second operand 27 states. [2020-10-26 19:47:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:44,730 INFO L93 Difference]: Finished difference Result 374 states and 454 transitions. [2020-10-26 19:47:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:47:44,731 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 200 [2020-10-26 19:47:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:44,734 INFO L225 Difference]: With dead ends: 374 [2020-10-26 19:47:44,734 INFO L226 Difference]: Without dead ends: 292 [2020-10-26 19:47:44,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:47:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-26 19:47:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2020-10-26 19:47:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-26 19:47:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2020-10-26 19:47:44,747 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 200 [2020-10-26 19:47:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:44,748 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2020-10-26 19:47:44,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:47:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2020-10-26 19:47:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 19:47:44,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:44,749 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:44,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:47:44,750 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash -71807177, now seen corresponding path program 24 times [2020-10-26 19:47:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:44,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840488752] [2020-10-26 19:47:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:45,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:49,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:49,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-26 19:47:49,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:49,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:47:49,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:49,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:47:49,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:49,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 19:47:49,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:50,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:50,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:50,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:50,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:50,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:50,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:50,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:50,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-26 19:47:50,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840488752] [2020-10-26 19:47:50,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:50,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:47:50,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483296971] [2020-10-26 19:47:50,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:47:50,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:47:50,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:47:50,438 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand 28 states. [2020-10-26 19:47:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:51,082 INFO L93 Difference]: Finished difference Result 388 states and 471 transitions. [2020-10-26 19:47:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:47:51,083 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 208 [2020-10-26 19:47:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:51,085 INFO L225 Difference]: With dead ends: 388 [2020-10-26 19:47:51,085 INFO L226 Difference]: Without dead ends: 303 [2020-10-26 19:47:51,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:47:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-26 19:47:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 295. [2020-10-26 19:47:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-26 19:47:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 372 transitions. [2020-10-26 19:47:51,098 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 372 transitions. Word has length 208 [2020-10-26 19:47:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:51,099 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 372 transitions. [2020-10-26 19:47:51,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:47:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 372 transitions. [2020-10-26 19:47:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-26 19:47:51,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:51,101 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:51,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:47:51,101 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1929961247, now seen corresponding path program 25 times [2020-10-26 19:47:51,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:51,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298331727] [2020-10-26 19:47:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:51,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:51,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:56,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:56,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-26 19:47:56,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:56,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:47:56,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:56,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:47:56,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:56,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 19:47:56,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:56,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:56,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:56,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:56,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:56,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:56,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:47:56,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:56,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-26 19:47:56,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298331727] [2020-10-26 19:47:56,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:56,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:47:56,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324452077] [2020-10-26 19:47:56,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:47:56,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:47:56,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:47:56,896 INFO L87 Difference]: Start difference. First operand 295 states and 372 transitions. Second operand 29 states. [2020-10-26 19:47:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:57,736 INFO L93 Difference]: Finished difference Result 402 states and 488 transitions. [2020-10-26 19:47:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:47:57,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 216 [2020-10-26 19:47:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:57,740 INFO L225 Difference]: With dead ends: 402 [2020-10-26 19:47:57,740 INFO L226 Difference]: Without dead ends: 314 [2020-10-26 19:47:57,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:47:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-26 19:47:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 306. [2020-10-26 19:47:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-26 19:47:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 386 transitions. [2020-10-26 19:47:57,755 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 386 transitions. Word has length 216 [2020-10-26 19:47:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:57,755 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 386 transitions. [2020-10-26 19:47:57,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:47:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 386 transitions. [2020-10-26 19:47:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-26 19:47:57,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:57,758 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:57,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:47:57,758 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1623281673, now seen corresponding path program 26 times [2020-10-26 19:47:57,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:57,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327961142] [2020-10-26 19:47:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:58,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:02,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-26 19:48:02,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:02,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:48:02,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:48:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 19:48:02,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:03,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:03,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:03,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:03,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:03,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:03,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-26 19:48:03,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327961142] [2020-10-26 19:48:03,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:03,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:48:03,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601856970] [2020-10-26 19:48:03,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:48:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:03,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:48:03,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:48:03,549 INFO L87 Difference]: Start difference. First operand 306 states and 386 transitions. Second operand 30 states. [2020-10-26 19:48:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:04,438 INFO L93 Difference]: Finished difference Result 416 states and 505 transitions. [2020-10-26 19:48:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:48:04,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 224 [2020-10-26 19:48:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:04,441 INFO L225 Difference]: With dead ends: 416 [2020-10-26 19:48:04,442 INFO L226 Difference]: Without dead ends: 325 [2020-10-26 19:48:04,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:48:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-26 19:48:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2020-10-26 19:48:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-26 19:48:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 400 transitions. [2020-10-26 19:48:04,457 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 400 transitions. Word has length 224 [2020-10-26 19:48:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:04,457 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 400 transitions. [2020-10-26 19:48:04,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:48:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 400 transitions. [2020-10-26 19:48:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 19:48:04,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:04,460 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:04,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:48:04,460 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1479509471, now seen corresponding path program 27 times [2020-10-26 19:48:04,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:04,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704187733] [2020-10-26 19:48:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:05,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-26 19:48:09,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:10,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:10,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:10,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:10,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:10,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:10,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:10,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:10,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:10,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:10,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-26 19:48:10,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704187733] [2020-10-26 19:48:10,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:10,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:48:10,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222680778] [2020-10-26 19:48:10,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:48:10,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:10,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:48:10,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:48:10,288 INFO L87 Difference]: Start difference. First operand 317 states and 400 transitions. Second operand 31 states. [2020-10-26 19:48:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:11,199 INFO L93 Difference]: Finished difference Result 430 states and 522 transitions. [2020-10-26 19:48:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:48:11,200 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 232 [2020-10-26 19:48:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:11,204 INFO L225 Difference]: With dead ends: 430 [2020-10-26 19:48:11,204 INFO L226 Difference]: Without dead ends: 336 [2020-10-26 19:48:11,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:48:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-26 19:48:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-10-26 19:48:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-26 19:48:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 414 transitions. [2020-10-26 19:48:11,218 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 414 transitions. Word has length 232 [2020-10-26 19:48:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:11,219 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 414 transitions. [2020-10-26 19:48:11,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:48:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 414 transitions. [2020-10-26 19:48:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-26 19:48:11,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:11,221 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:11,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:48:11,221 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:11,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1343602505, now seen corresponding path program 28 times [2020-10-26 19:48:11,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:11,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373037088] [2020-10-26 19:48:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:11,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:11,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:16,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:16,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-26 19:48:16,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:16,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:48:16,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:16,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:48:16,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:16,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 19:48:16,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:17,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:17,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:17,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:17,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:17,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:17,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:17,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:17,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:17,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-26 19:48:17,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373037088] [2020-10-26 19:48:17,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:17,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:48:17,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566559016] [2020-10-26 19:48:17,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:48:17,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:48:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:48:17,073 INFO L87 Difference]: Start difference. First operand 328 states and 414 transitions. Second operand 32 states. [2020-10-26 19:48:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:18,004 INFO L93 Difference]: Finished difference Result 444 states and 539 transitions. [2020-10-26 19:48:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:48:18,005 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 240 [2020-10-26 19:48:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:18,007 INFO L225 Difference]: With dead ends: 444 [2020-10-26 19:48:18,008 INFO L226 Difference]: Without dead ends: 347 [2020-10-26 19:48:18,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:48:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-26 19:48:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2020-10-26 19:48:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-26 19:48:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 428 transitions. [2020-10-26 19:48:18,022 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 428 transitions. Word has length 240 [2020-10-26 19:48:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:18,022 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 428 transitions. [2020-10-26 19:48:18,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:48:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 428 transitions. [2020-10-26 19:48:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-26 19:48:18,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:18,025 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:18,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:48:18,025 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -99441823, now seen corresponding path program 29 times [2020-10-26 19:48:18,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:18,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135649569] [2020-10-26 19:48:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:18,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:23,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:23,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-26 19:48:23,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:23,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:48:23,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:23,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:48:23,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:23,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-26 19:48:23,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:23,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:23,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:23,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:23,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:23,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:23,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-26 19:48:23,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135649569] [2020-10-26 19:48:23,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:23,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:48:23,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503663575] [2020-10-26 19:48:23,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:48:23,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:23,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:48:23,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:48:23,906 INFO L87 Difference]: Start difference. First operand 339 states and 428 transitions. Second operand 33 states. [2020-10-26 19:48:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:24,770 INFO L93 Difference]: Finished difference Result 458 states and 556 transitions. [2020-10-26 19:48:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:48:24,771 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 248 [2020-10-26 19:48:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:24,774 INFO L225 Difference]: With dead ends: 458 [2020-10-26 19:48:24,774 INFO L226 Difference]: Without dead ends: 358 [2020-10-26 19:48:24,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:48:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-26 19:48:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2020-10-26 19:48:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-26 19:48:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 442 transitions. [2020-10-26 19:48:24,789 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 442 transitions. Word has length 248 [2020-10-26 19:48:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:24,790 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 442 transitions. [2020-10-26 19:48:24,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:48:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 442 transitions. [2020-10-26 19:48:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-26 19:48:24,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:24,793 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:24,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:48:24,794 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash 261554551, now seen corresponding path program 30 times [2020-10-26 19:48:24,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:24,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101134400] [2020-10-26 19:48:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:24,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:25,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:29,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-26 19:48:29,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:30,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:30,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:30,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:30,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:30,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:30,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:30,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:30,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-10-26 19:48:30,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101134400] [2020-10-26 19:48:30,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:30,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:48:30,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861773407] [2020-10-26 19:48:30,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:48:30,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:30,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:48:30,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:48:30,791 INFO L87 Difference]: Start difference. First operand 350 states and 442 transitions. Second operand 34 states. [2020-10-26 19:48:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:31,741 INFO L93 Difference]: Finished difference Result 472 states and 573 transitions. [2020-10-26 19:48:31,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:48:31,741 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 256 [2020-10-26 19:48:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:31,745 INFO L225 Difference]: With dead ends: 472 [2020-10-26 19:48:31,745 INFO L226 Difference]: Without dead ends: 369 [2020-10-26 19:48:31,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:48:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-26 19:48:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 361. [2020-10-26 19:48:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-26 19:48:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 456 transitions. [2020-10-26 19:48:31,761 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 456 transitions. Word has length 256 [2020-10-26 19:48:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:31,761 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 456 transitions. [2020-10-26 19:48:31,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:48:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 456 transitions. [2020-10-26 19:48:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 19:48:31,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:31,764 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:31,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:48:31,765 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash -866018143, now seen corresponding path program 31 times [2020-10-26 19:48:31,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:31,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869637468] [2020-10-26 19:48:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:31,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:32,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:36,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-26 19:48:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:37,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:37,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:37,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:37,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:37,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:37,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:37,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:37,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:37,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-26 19:48:37,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869637468] [2020-10-26 19:48:37,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:37,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:48:37,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607824336] [2020-10-26 19:48:37,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:48:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:48:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:48:37,849 INFO L87 Difference]: Start difference. First operand 361 states and 456 transitions. Second operand 35 states. [2020-10-26 19:48:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:38,965 INFO L93 Difference]: Finished difference Result 486 states and 590 transitions. [2020-10-26 19:48:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:48:38,970 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 264 [2020-10-26 19:48:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:38,973 INFO L225 Difference]: With dead ends: 486 [2020-10-26 19:48:38,973 INFO L226 Difference]: Without dead ends: 380 [2020-10-26 19:48:38,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:48:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-26 19:48:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 372. [2020-10-26 19:48:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-26 19:48:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 470 transitions. [2020-10-26 19:48:38,987 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 470 transitions. Word has length 264 [2020-10-26 19:48:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:38,988 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 470 transitions. [2020-10-26 19:48:38,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:48:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 470 transitions. [2020-10-26 19:48:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 19:48:38,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:38,990 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:38,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:48:38,991 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash -887033289, now seen corresponding path program 32 times [2020-10-26 19:48:38,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:38,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733458890] [2020-10-26 19:48:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:39,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-26 19:48:44,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:45,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:45,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:45,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-26 19:48:45,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733458890] [2020-10-26 19:48:45,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:48:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765766793] [2020-10-26 19:48:45,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:48:45,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:48:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:48:45,076 INFO L87 Difference]: Start difference. First operand 372 states and 470 transitions. Second operand 36 states. [2020-10-26 19:48:46,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:46,204 INFO L93 Difference]: Finished difference Result 500 states and 607 transitions. [2020-10-26 19:48:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:48:46,205 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 272 [2020-10-26 19:48:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:46,208 INFO L225 Difference]: With dead ends: 500 [2020-10-26 19:48:46,208 INFO L226 Difference]: Without dead ends: 391 [2020-10-26 19:48:46,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:48:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-26 19:48:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 383. [2020-10-26 19:48:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-26 19:48:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 484 transitions. [2020-10-26 19:48:46,223 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 484 transitions. Word has length 272 [2020-10-26 19:48:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:46,223 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 484 transitions. [2020-10-26 19:48:46,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:48:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 484 transitions. [2020-10-26 19:48:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 19:48:46,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:46,226 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:46,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:48:46,226 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1549886945, now seen corresponding path program 33 times [2020-10-26 19:48:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:46,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123184825] [2020-10-26 19:48:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:46,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:51,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 19:48:51,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:52,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:52,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:52,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:52,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:52,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:52,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:52,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:52,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:52,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:52,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-26 19:48:52,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123184825] [2020-10-26 19:48:52,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:52,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:48:52,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845623646] [2020-10-26 19:48:52,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:48:52,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:48:52,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:48:52,358 INFO L87 Difference]: Start difference. First operand 383 states and 484 transitions. Second operand 37 states. [2020-10-26 19:48:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:53,549 INFO L93 Difference]: Finished difference Result 514 states and 624 transitions. [2020-10-26 19:48:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:48:53,550 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 280 [2020-10-26 19:48:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:53,553 INFO L225 Difference]: With dead ends: 514 [2020-10-26 19:48:53,554 INFO L226 Difference]: Without dead ends: 402 [2020-10-26 19:48:53,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:48:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-26 19:48:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 394. [2020-10-26 19:48:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-26 19:48:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 498 transitions. [2020-10-26 19:48:53,568 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 498 transitions. Word has length 280 [2020-10-26 19:48:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:53,569 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 498 transitions. [2020-10-26 19:48:53,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:48:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 498 transitions. [2020-10-26 19:48:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-26 19:48:53,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:53,572 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:53,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:48:53,572 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -630975753, now seen corresponding path program 34 times [2020-10-26 19:48:53,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:53,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627630536] [2020-10-26 19:48:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-26 19:48:58,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:58,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:48:58,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:48:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 19:48:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:59,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:59,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-26 19:48:59,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627630536] [2020-10-26 19:48:59,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:59,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:48:59,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653070425] [2020-10-26 19:48:59,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:48:59,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:59,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:48:59,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:48:59,774 INFO L87 Difference]: Start difference. First operand 394 states and 498 transitions. Second operand 38 states. [2020-10-26 19:49:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:00,947 INFO L93 Difference]: Finished difference Result 528 states and 641 transitions. [2020-10-26 19:49:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:49:00,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 288 [2020-10-26 19:49:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:00,954 INFO L225 Difference]: With dead ends: 528 [2020-10-26 19:49:00,954 INFO L226 Difference]: Without dead ends: 413 [2020-10-26 19:49:00,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:49:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-26 19:49:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 405. [2020-10-26 19:49:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-26 19:49:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 512 transitions. [2020-10-26 19:49:00,970 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 512 transitions. Word has length 288 [2020-10-26 19:49:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:00,970 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 512 transitions. [2020-10-26 19:49:00,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:49:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 512 transitions. [2020-10-26 19:49:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-26 19:49:00,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:00,973 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:00,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:49:00,973 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:00,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash 481689377, now seen corresponding path program 35 times [2020-10-26 19:49:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:00,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251417739] [2020-10-26 19:49:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:01,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:02,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:06,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-26 19:49:06,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:06,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:49:06,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:49:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:06,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-26 19:49:06,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:07,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:07,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:07,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:07,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:07,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:07,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:07,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:07,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:07,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-26 19:49:07,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251417739] [2020-10-26 19:49:07,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:07,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:49:07,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919571820] [2020-10-26 19:49:07,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:49:07,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:07,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:49:07,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:49:07,277 INFO L87 Difference]: Start difference. First operand 405 states and 512 transitions. Second operand 39 states. [2020-10-26 19:49:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:08,287 INFO L93 Difference]: Finished difference Result 542 states and 658 transitions. [2020-10-26 19:49:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:49:08,288 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 296 [2020-10-26 19:49:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:08,291 INFO L225 Difference]: With dead ends: 542 [2020-10-26 19:49:08,291 INFO L226 Difference]: Without dead ends: 424 [2020-10-26 19:49:08,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:49:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-26 19:49:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 416. [2020-10-26 19:49:08,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-26 19:49:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 526 transitions. [2020-10-26 19:49:08,305 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 526 transitions. Word has length 296 [2020-10-26 19:49:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:08,306 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 526 transitions. [2020-10-26 19:49:08,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:49:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 526 transitions. [2020-10-26 19:49:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-26 19:49:08,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:08,309 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:08,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:49:08,309 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash -532913225, now seen corresponding path program 36 times [2020-10-26 19:49:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:08,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739025112] [2020-10-26 19:49:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:08,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:13,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:13,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-26 19:49:13,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:13,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:49:13,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:49:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-26 19:49:13,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:14,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:14,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:14,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:14,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-26 19:49:14,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739025112] [2020-10-26 19:49:14,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:14,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:49:14,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592485109] [2020-10-26 19:49:14,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:49:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:49:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:49:14,677 INFO L87 Difference]: Start difference. First operand 416 states and 526 transitions. Second operand 40 states. [2020-10-26 19:49:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:15,925 INFO L93 Difference]: Finished difference Result 556 states and 675 transitions. [2020-10-26 19:49:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:49:15,926 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 304 [2020-10-26 19:49:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:15,929 INFO L225 Difference]: With dead ends: 556 [2020-10-26 19:49:15,930 INFO L226 Difference]: Without dead ends: 435 [2020-10-26 19:49:15,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:49:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-26 19:49:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 427. [2020-10-26 19:49:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-26 19:49:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 540 transitions. [2020-10-26 19:49:15,944 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 540 transitions. Word has length 304 [2020-10-26 19:49:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:15,944 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 540 transitions. [2020-10-26 19:49:15,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:49:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 540 transitions. [2020-10-26 19:49:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-26 19:49:15,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:15,947 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:15,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:49:15,947 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash -184326047, now seen corresponding path program 37 times [2020-10-26 19:49:15,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:15,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196324347] [2020-10-26 19:49:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:17,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:21,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:21,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-26 19:49:21,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:21,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:49:21,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:49:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 187 [2020-10-26 19:49:21,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:22,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-10-26 19:49:22,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196324347] [2020-10-26 19:49:22,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:22,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:49:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261223198] [2020-10-26 19:49:22,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:49:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:22,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:49:22,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:49:22,351 INFO L87 Difference]: Start difference. First operand 427 states and 540 transitions. Second operand 41 states. [2020-10-26 19:49:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:23,480 INFO L93 Difference]: Finished difference Result 570 states and 692 transitions. [2020-10-26 19:49:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:49:23,481 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 312 [2020-10-26 19:49:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:23,485 INFO L225 Difference]: With dead ends: 570 [2020-10-26 19:49:23,485 INFO L226 Difference]: Without dead ends: 446 [2020-10-26 19:49:23,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:49:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-26 19:49:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 438. [2020-10-26 19:49:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-26 19:49:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 554 transitions. [2020-10-26 19:49:23,500 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 554 transitions. Word has length 312 [2020-10-26 19:49:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:23,500 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 554 transitions. [2020-10-26 19:49:23,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:49:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 554 transitions. [2020-10-26 19:49:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-26 19:49:23,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:23,503 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:23,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:49:23,503 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:23,504 INFO L82 PathProgramCache]: Analyzing trace with hash -360323977, now seen corresponding path program 38 times [2020-10-26 19:49:23,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:23,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633754742] [2020-10-26 19:49:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:23,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:28,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-26 19:49:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:29,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:29,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:29,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:29,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:29,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:29,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:29,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:29,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-10-26 19:49:29,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633754742] [2020-10-26 19:49:29,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:29,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:49:29,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360569805] [2020-10-26 19:49:29,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:49:29,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:49:29,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:49:29,978 INFO L87 Difference]: Start difference. First operand 438 states and 554 transitions. Second operand 42 states. [2020-10-26 19:49:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:31,091 INFO L93 Difference]: Finished difference Result 584 states and 709 transitions. [2020-10-26 19:49:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:49:31,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 320 [2020-10-26 19:49:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:31,095 INFO L225 Difference]: With dead ends: 584 [2020-10-26 19:49:31,095 INFO L226 Difference]: Without dead ends: 457 [2020-10-26 19:49:31,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:49:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-26 19:49:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 449. [2020-10-26 19:49:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-26 19:49:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 568 transitions. [2020-10-26 19:49:31,109 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 568 transitions. Word has length 320 [2020-10-26 19:49:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:31,110 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 568 transitions. [2020-10-26 19:49:31,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:49:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 568 transitions. [2020-10-26 19:49:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-26 19:49:31,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:31,113 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:31,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:49:31,113 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2115133023, now seen corresponding path program 39 times [2020-10-26 19:49:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:31,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478559316] [2020-10-26 19:49:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:31,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:32,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:36,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-26 19:49:36,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:37,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:37,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:37,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:37,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:37,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:37,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:37,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:37,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:37,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:37,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-10-26 19:49:37,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478559316] [2020-10-26 19:49:37,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:37,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:49:37,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046773601] [2020-10-26 19:49:37,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:49:37,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:37,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:49:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:49:37,649 INFO L87 Difference]: Start difference. First operand 449 states and 568 transitions. Second operand 43 states. [2020-10-26 19:49:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:38,889 INFO L93 Difference]: Finished difference Result 598 states and 726 transitions. [2020-10-26 19:49:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:49:38,889 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 328 [2020-10-26 19:49:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:38,893 INFO L225 Difference]: With dead ends: 598 [2020-10-26 19:49:38,893 INFO L226 Difference]: Without dead ends: 468 [2020-10-26 19:49:38,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:49:38,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-26 19:49:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 460. [2020-10-26 19:49:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-26 19:49:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 582 transitions. [2020-10-26 19:49:38,903 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 582 transitions. Word has length 328 [2020-10-26 19:49:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:38,903 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 582 transitions. [2020-10-26 19:49:38,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:49:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 582 transitions. [2020-10-26 19:49:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-26 19:49:38,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:38,906 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:38,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:49:38,907 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:38,907 INFO L82 PathProgramCache]: Analyzing trace with hash 840734007, now seen corresponding path program 40 times [2020-10-26 19:49:38,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:38,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096623051] [2020-10-26 19:49:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:38,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:39,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-26 19:49:43,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:45,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:45,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:45,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:45,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:45,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:45,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:45,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:45,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-26 19:49:45,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096623051] [2020-10-26 19:49:45,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:45,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:49:45,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726915703] [2020-10-26 19:49:45,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:49:45,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:49:45,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:49:45,488 INFO L87 Difference]: Start difference. First operand 460 states and 582 transitions. Second operand 44 states. [2020-10-26 19:49:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:46,628 INFO L93 Difference]: Finished difference Result 612 states and 743 transitions. [2020-10-26 19:49:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:49:46,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 336 [2020-10-26 19:49:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:46,632 INFO L225 Difference]: With dead ends: 612 [2020-10-26 19:49:46,632 INFO L226 Difference]: Without dead ends: 479 [2020-10-26 19:49:46,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:49:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-26 19:49:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 471. [2020-10-26 19:49:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-26 19:49:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 596 transitions. [2020-10-26 19:49:46,645 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 596 transitions. Word has length 336 [2020-10-26 19:49:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:46,646 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 596 transitions. [2020-10-26 19:49:46,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:49:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 596 transitions. [2020-10-26 19:49:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-26 19:49:46,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:46,649 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:46,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:49:46,649 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1427679969, now seen corresponding path program 41 times [2020-10-26 19:49:46,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:46,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889481238] [2020-10-26 19:49:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:46,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:51,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 354 [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-26 19:49:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:53,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:53,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-10-26 19:49:53,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889481238] [2020-10-26 19:49:53,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:53,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:49:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54611825] [2020-10-26 19:49:53,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:49:53,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:49:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:49:53,276 INFO L87 Difference]: Start difference. First operand 471 states and 596 transitions. Second operand 45 states. [2020-10-26 19:49:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:54,587 INFO L93 Difference]: Finished difference Result 626 states and 760 transitions. [2020-10-26 19:49:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:49:54,588 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 344 [2020-10-26 19:49:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:54,591 INFO L225 Difference]: With dead ends: 626 [2020-10-26 19:49:54,591 INFO L226 Difference]: Without dead ends: 490 [2020-10-26 19:49:54,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:49:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-26 19:49:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 482. [2020-10-26 19:49:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-10-26 19:49:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 610 transitions. [2020-10-26 19:49:54,602 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 610 transitions. Word has length 344 [2020-10-26 19:49:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:54,603 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 610 transitions. [2020-10-26 19:49:54,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:49:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 610 transitions. [2020-10-26 19:49:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-26 19:49:54,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:54,606 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:54,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:49:54,606 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash -623086089, now seen corresponding path program 42 times [2020-10-26 19:49:54,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:54,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400316314] [2020-10-26 19:49:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:56,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:59,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:59,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 362 [2020-10-26 19:49:59,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:59,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:49:59,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:59,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:49:59,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:59,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-26 19:49:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:01,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:01,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:01,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:01,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:01,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:01,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:50:01,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:01,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:01,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:01,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7014 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2020-10-26 19:50:01,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400316314] [2020-10-26 19:50:01,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:01,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:50:01,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582000945] [2020-10-26 19:50:01,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:50:01,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:50:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:50:01,385 INFO L87 Difference]: Start difference. First operand 482 states and 610 transitions. Second operand 46 states. [2020-10-26 19:50:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:02,662 INFO L93 Difference]: Finished difference Result 640 states and 777 transitions. [2020-10-26 19:50:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:50:02,663 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 352 [2020-10-26 19:50:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:02,666 INFO L225 Difference]: With dead ends: 640 [2020-10-26 19:50:02,667 INFO L226 Difference]: Without dead ends: 501 [2020-10-26 19:50:02,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:50:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-26 19:50:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 493. [2020-10-26 19:50:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-26 19:50:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 624 transitions. [2020-10-26 19:50:02,680 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 624 transitions. Word has length 352 [2020-10-26 19:50:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:02,681 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 624 transitions. [2020-10-26 19:50:02,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:50:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 624 transitions. [2020-10-26 19:50:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-10-26 19:50:02,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:02,684 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:02,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:50:02,684 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:02,684 INFO L82 PathProgramCache]: Analyzing trace with hash 891847713, now seen corresponding path program 43 times [2020-10-26 19:50:02,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:02,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420497817] [2020-10-26 19:50:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:04,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking...