/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_24-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:13:30,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:13:30,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:13:30,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:13:30,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:13:30,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:13:30,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:13:30,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:13:30,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:13:30,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:13:30,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:13:30,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:13:30,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:13:30,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:13:30,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:13:30,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:13:30,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:13:30,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:13:30,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:13:30,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:13:30,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:13:30,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:13:30,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:13:30,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:13:30,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:13:30,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:13:30,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:13:30,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:13:30,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:13:30,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:13:30,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:13:30,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:13:30,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:13:30,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:13:30,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:13:30,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:13:30,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:13:30,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:13:30,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:13:30,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:13:30,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:13:30,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:13:30,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:13:30,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:13:30,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:13:30,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:13:30,506 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:13:30,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:13:30,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:13:30,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:13:30,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:13:30,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:13:30,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:13:30,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:13:30,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:13:30,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:13:30,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:13:30,509 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:13:30,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:13:30,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:13:30,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:13:30,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:13:30,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:13:30,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:30,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:13:30,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:13:30,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:13:30,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:13:30,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:13:30,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:13:30,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:13:30,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:13:31,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:13:31,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:13:31,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:13:31,039 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:13:31,040 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:13:31,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-10-26 19:13:31,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9811b4700/3d0fb9924c36435089c1de97b45d7b76/FLAGe3b07de9c [2020-10-26 19:13:31,757 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:13:31,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-10-26 19:13:31,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9811b4700/3d0fb9924c36435089c1de97b45d7b76/FLAGe3b07de9c [2020-10-26 19:13:32,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9811b4700/3d0fb9924c36435089c1de97b45d7b76 [2020-10-26 19:13:32,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:13:32,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:13:32,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:32,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:13:32,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:13:32,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3c1806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32, skipping insertion in model container [2020-10-26 19:13:32,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:13:32,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:13:32,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:32,447 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:13:32,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:32,500 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:13:32,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32 WrapperNode [2020-10-26 19:13:32,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:32,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:13:32,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:13:32,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:13:32,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... [2020-10-26 19:13:32,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:13:32,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:13:32,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:13:32,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:13:32,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:32,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:13:32,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:13:32,697 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:13:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:13:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure printEven [2020-10-26 19:13:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure printOdd [2020-10-26 19:13:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:13:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:13:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:13:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:13:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:13:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:13:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:13:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:13:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:13:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure printEven [2020-10-26 19:13:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure printOdd [2020-10-26 19:13:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:13:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:13:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:13:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:13:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:13:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:13:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:13:33,192 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:13:33,197 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:13:33,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:33 BoogieIcfgContainer [2020-10-26 19:13:33,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:13:33,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:13:33,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:13:33,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:13:33,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:13:32" (1/3) ... [2020-10-26 19:13:33,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecf616e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:33, skipping insertion in model container [2020-10-26 19:13:33,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:32" (2/3) ... [2020-10-26 19:13:33,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecf616e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:33, skipping insertion in model container [2020-10-26 19:13:33,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:33" (3/3) ... [2020-10-26 19:13:33,214 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2020-10-26 19:13:33,229 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:13:33,238 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:13:33,250 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:13:33,282 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:13:33,283 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:13:33,283 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:13:33,283 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:13:33,283 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:13:33,283 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:13:33,283 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:13:33,283 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:13:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-26 19:13:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:33,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:33,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:33,313 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash 52760576, now seen corresponding path program 1 times [2020-10-26 19:13:33,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:33,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977785056] [2020-10-26 19:13:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:33,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:34,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:34,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:13:34,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-26 19:13:34,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:34,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:34,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:34,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:13:34,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:34,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:34,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:34,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:34,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:13:34,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:34,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:34,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:34,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977785056] [2020-10-26 19:13:34,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:34,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:13:34,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806363166] [2020-10-26 19:13:34,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:13:34,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:34,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:13:34,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:34,277 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-26 19:13:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:34,408 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-10-26 19:13:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:13:34,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-26 19:13:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:34,419 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:13:34,419 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:13:34,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:13:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-26 19:13:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:13:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-26 19:13:34,471 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 18 [2020-10-26 19:13:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:34,472 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-26 19:13:34,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:13:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-26 19:13:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:34,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:34,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:34,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:13:34,475 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash -721735738, now seen corresponding path program 1 times [2020-10-26 19:13:34,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:34,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746252230] [2020-10-26 19:13:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:34,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:35,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:35,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:13:35,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:35,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-26 19:13:35,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:35,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:35,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:35,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:35,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:35,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:35,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:35,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:35,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:35,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:35,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:35,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:35,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746252230] [2020-10-26 19:13:35,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:35,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 19:13:35,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954192418] [2020-10-26 19:13:35,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:35,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:35,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:35,185 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-10-26 19:13:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:35,498 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-10-26 19:13:35,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:35,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-26 19:13:35,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:35,501 INFO L225 Difference]: With dead ends: 79 [2020-10-26 19:13:35,501 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:13:35,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:13:35,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-10-26 19:13:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:13:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-26 19:13:35,517 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 18 [2020-10-26 19:13:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:35,517 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-26 19:13:35,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-26 19:13:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:13:35,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:35,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:35,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:13:35,520 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:35,520 INFO L82 PathProgramCache]: Analyzing trace with hash 70219944, now seen corresponding path program 1 times [2020-10-26 19:13:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:35,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645972682] [2020-10-26 19:13:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:35,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:35,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:35,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:13:35,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:35,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 19:13:35,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:13:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-26 19:13:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:13:35,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:35,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:35,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:35,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:35,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:35,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:35,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:35,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:35,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:35,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:35,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:13:35,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645972682] [2020-10-26 19:13:35,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:35,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-26 19:13:35,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585716967] [2020-10-26 19:13:35,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:13:35,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:13:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:35,857 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-10-26 19:13:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:36,193 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-26 19:13:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:13:36,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-26 19:13:36,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:36,195 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:13:36,195 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:13:36,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:13:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:13:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:13:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:13:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:13:36,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 20 [2020-10-26 19:13:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:36,217 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:13:36,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:13:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:13:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:13:36,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:36,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:36,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:13:36,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1030033712, now seen corresponding path program 1 times [2020-10-26 19:13:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:36,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541360356] [2020-10-26 19:13:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:36,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:36,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:36,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:36,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:36,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:13:36,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:36,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-26 19:13:36,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:13:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:13:36,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:37,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:37,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:37,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:37,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:13:37,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:37,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:37,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:37,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:37,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:37,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541360356] [2020-10-26 19:13:37,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:37,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:13:37,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393253485] [2020-10-26 19:13:37,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:13:37,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:37,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:13:37,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:13:37,281 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-10-26 19:13:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:39,124 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2020-10-26 19:13:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:13:39,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-26 19:13:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:39,128 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:13:39,128 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:13:39,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:13:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:13:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2020-10-26 19:13:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:13:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2020-10-26 19:13:39,155 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 25 [2020-10-26 19:13:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:39,155 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2020-10-26 19:13:39,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:13:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2020-10-26 19:13:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:13:39,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:39,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:39,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:13:39,157 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:39,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:39,158 INFO L82 PathProgramCache]: Analyzing trace with hash -632339538, now seen corresponding path program 2 times [2020-10-26 19:13:39,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:39,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178189293] [2020-10-26 19:13:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:39,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:40,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:13:40,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:40,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1726 [2020-10-26 19:13:40,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:13:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:13:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:40,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:40,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:40,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:40,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:40,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178189293] [2020-10-26 19:13:40,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:40,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:13:40,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562023382] [2020-10-26 19:13:40,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:13:40,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:40,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:13:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:40,989 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 8 states. [2020-10-26 19:13:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:41,415 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2020-10-26 19:13:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:13:41,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-26 19:13:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:41,419 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:13:41,419 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:13:41,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:13:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:13:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2020-10-26 19:13:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:13:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-10-26 19:13:41,455 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 27 [2020-10-26 19:13:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:41,458 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-10-26 19:13:41,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:13:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-10-26 19:13:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:13:41,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:41,460 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, 1, 1, 1, 1] [2020-10-26 19:13:41,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:13:41,461 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:41,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1629875380, now seen corresponding path program 1 times [2020-10-26 19:13:41,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:41,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387039047] [2020-10-26 19:13:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:41,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:13:46,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:13:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:13:46,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:13:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:13:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:46,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:46,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:46,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:13:46,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:46,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:13:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:13:46,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387039047] [2020-10-26 19:13:46,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:46,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:13:46,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647747928] [2020-10-26 19:13:46,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:13:46,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:13:46,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:46,583 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 8 states. [2020-10-26 19:13:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:46,872 INFO L93 Difference]: Finished difference Result 142 states and 170 transitions. [2020-10-26 19:13:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:13:46,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-26 19:13:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:46,875 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:13:46,876 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:13:46,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:13:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:13:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-10-26 19:13:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:13:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-26 19:13:46,896 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 28 [2020-10-26 19:13:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:46,897 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-26 19:13:46,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:13:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-26 19:13:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:13:46,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:46,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:46,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:13:46,900 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1852262793, now seen corresponding path program 3 times [2020-10-26 19:13:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:46,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078872197] [2020-10-26 19:13:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:48,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:13:48,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:13:48,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1954 [2020-10-26 19:13:48,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:48,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:13:48,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:13:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:49,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:49,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:49,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:49,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:49,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:49,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:49,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:49,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:49,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:49,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078872197] [2020-10-26 19:13:49,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:49,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:13:49,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121921187] [2020-10-26 19:13:49,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:13:49,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:49,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:13:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:13:49,506 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 20 states. [2020-10-26 19:13:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:53,597 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2020-10-26 19:13:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:13:53,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-10-26 19:13:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:53,600 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:13:53,600 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:13:53,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=521, Invalid=2559, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:13:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:13:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 102. [2020-10-26 19:13:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:13:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2020-10-26 19:13:53,631 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 30 [2020-10-26 19:13:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:53,633 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2020-10-26 19:13:53,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:13:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2020-10-26 19:13:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:13:53,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:53,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:53,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:13:53,642 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash -62079911, now seen corresponding path program 4 times [2020-10-26 19:13:53,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:53,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405947630] [2020-10-26 19:13:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:53,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:56,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:13:56,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2568 [2020-10-26 19:13:56,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:13:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:13:56,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:56,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:56,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:56,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:56,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:56,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:56,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:56,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:56,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:56,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:56,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:56,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405947630] [2020-10-26 19:13:56,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:56,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:13:56,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295952723] [2020-10-26 19:13:56,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:13:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:56,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:13:56,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:13:56,345 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand 10 states. [2020-10-26 19:13:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:56,932 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2020-10-26 19:13:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:13:56,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-26 19:13:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:56,935 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:13:56,935 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:13:56,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:13:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:13:56,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2020-10-26 19:13:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:13:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2020-10-26 19:13:56,957 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 32 [2020-10-26 19:13:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:56,957 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2020-10-26 19:13:56,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:13:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2020-10-26 19:13:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:13:56,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:56,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:56,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:13:56,959 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1837028933, now seen corresponding path program 2 times [2020-10-26 19:13:56,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:56,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602902669] [2020-10-26 19:13:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:59,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:01,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:01,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:14:01,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:14:01,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:14:01,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:14:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:14:01,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:02,580 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-26 19:14:03,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:03,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:03,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:03,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:03,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:03,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:03,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:03,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:03,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:03,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:14:03,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602902669] [2020-10-26 19:14:03,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:03,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:14:03,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634586515] [2020-10-26 19:14:03,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:14:03,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:14:03,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:03,087 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand 20 states. [2020-10-26 19:14:04,557 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 102 [2020-10-26 19:14:04,765 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-26 19:14:05,006 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-10-26 19:14:05,399 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 19:14:05,669 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2020-10-26 19:14:05,891 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 19:14:06,137 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-26 19:14:06,459 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2020-10-26 19:14:07,009 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-26 19:14:07,261 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2020-10-26 19:14:07,479 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-26 19:14:07,717 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-26 19:14:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:08,022 INFO L93 Difference]: Finished difference Result 168 states and 209 transitions. [2020-10-26 19:14:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:14:08,023 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-10-26 19:14:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:08,025 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:14:08,025 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:14:08,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=400, Invalid=2050, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:14:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:14:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 116. [2020-10-26 19:14:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:14:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 144 transitions. [2020-10-26 19:14:08,050 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 144 transitions. Word has length 33 [2020-10-26 19:14:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:08,050 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 144 transitions. [2020-10-26 19:14:08,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:14:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 144 transitions. [2020-10-26 19:14:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:14:08,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:08,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:08,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:14:08,052 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:08,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1167635198, now seen corresponding path program 1 times [2020-10-26 19:14:08,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:08,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190804041] [2020-10-26 19:14:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:14:10,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:14:10,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2702 [2020-10-26 19:14:10,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:14:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:14:10,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:11,010 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2020-10-26 19:14:11,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:11,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:11,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:11,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:11,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:11,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:11,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:11,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:11,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:11,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:11,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-26 19:14:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:11,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:11,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:14:11,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:11,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:14:11,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:14:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:11,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:14:11,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:11,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:14:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:11,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:11,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:11,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:14:11,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:11,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:11,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:11,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:11,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:11,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:11,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:11,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190804041] [2020-10-26 19:14:11,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:11,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:14:11,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279854908] [2020-10-26 19:14:11,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:14:11,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:11,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:14:11,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:11,296 INFO L87 Difference]: Start difference. First operand 116 states and 144 transitions. Second operand 12 states. [2020-10-26 19:14:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:12,117 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2020-10-26 19:14:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:14:12,118 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-26 19:14:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:12,120 INFO L225 Difference]: With dead ends: 137 [2020-10-26 19:14:12,120 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:14:12,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:14:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2020-10-26 19:14:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:14:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2020-10-26 19:14:12,152 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 35 [2020-10-26 19:14:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:12,154 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2020-10-26 19:14:12,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:14:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2020-10-26 19:14:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:14:12,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:12,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:12,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:14:12,156 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash 156629484, now seen corresponding path program 5 times [2020-10-26 19:14:12,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:12,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995181696] [2020-10-26 19:14:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:14,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:14:14,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:14:14,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2777 [2020-10-26 19:14:14,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:14,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:14:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:14:14,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:14:15,422 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-26 19:14:15,581 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-26 19:14:15,760 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-26 19:14:16,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:16,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:16,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:16,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:16,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:16,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:16,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995181696] [2020-10-26 19:14:16,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:16,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:14:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299504879] [2020-10-26 19:14:16,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:14:16,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:16,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:14:16,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:16,363 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 24 states. [2020-10-26 19:14:16,790 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 19:14:17,096 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 19:14:19,368 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-26 19:14:19,580 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-26 19:14:19,832 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-26 19:14:19,983 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-26 19:14:20,454 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-26 19:14:20,828 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-26 19:14:21,866 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-26 19:14:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:22,210 INFO L93 Difference]: Finished difference Result 311 states and 417 transitions. [2020-10-26 19:14:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:14:22,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-26 19:14:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:22,216 INFO L225 Difference]: With dead ends: 311 [2020-10-26 19:14:22,216 INFO L226 Difference]: Without dead ends: 307 [2020-10-26 19:14:22,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=779, Invalid=3643, Unknown=0, NotChecked=0, Total=4422 [2020-10-26 19:14:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-26 19:14:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 168. [2020-10-26 19:14:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-26 19:14:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 226 transitions. [2020-10-26 19:14:22,249 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 226 transitions. Word has length 35 [2020-10-26 19:14:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:22,250 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 226 transitions. [2020-10-26 19:14:22,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:14:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 226 transitions. [2020-10-26 19:14:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:14:22,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:22,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:22,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:14:22,252 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash 956584266, now seen corresponding path program 6 times [2020-10-26 19:14:22,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:22,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412402065] [2020-10-26 19:14:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:22,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:22,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:25,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:14:25,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:25,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3169 [2020-10-26 19:14:25,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:25,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:14:25,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:25,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:14:25,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:25,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:25,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:25,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:25,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:25,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:25,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412402065] [2020-10-26 19:14:25,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:25,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:14:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061923742] [2020-10-26 19:14:25,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:14:25,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:14:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:25,600 INFO L87 Difference]: Start difference. First operand 168 states and 226 transitions. Second operand 12 states. [2020-10-26 19:14:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:26,532 INFO L93 Difference]: Finished difference Result 286 states and 388 transitions. [2020-10-26 19:14:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:14:26,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-26 19:14:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:26,536 INFO L225 Difference]: With dead ends: 286 [2020-10-26 19:14:26,536 INFO L226 Difference]: Without dead ends: 268 [2020-10-26 19:14:26,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-26 19:14:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 173. [2020-10-26 19:14:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-26 19:14:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2020-10-26 19:14:26,573 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 37 [2020-10-26 19:14:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:26,574 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2020-10-26 19:14:26,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:14:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2020-10-26 19:14:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:14:26,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:26,576 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:26,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:14:26,576 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1622416720, now seen corresponding path program 3 times [2020-10-26 19:14:26,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:26,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203069005] [2020-10-26 19:14:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:26,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:31,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:31,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:31,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:14:31,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:14:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:14:31,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:14:31,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:31,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:14:31,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:32,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:32,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:32,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:32,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:32,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:32,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:32,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:32,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:32,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:32,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:32,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:14:32,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203069005] [2020-10-26 19:14:32,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:32,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:14:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100970979] [2020-10-26 19:14:32,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:14:32,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:14:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:32,788 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand 24 states. [2020-10-26 19:14:35,008 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-26 19:14:37,520 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-26 19:14:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:37,829 INFO L93 Difference]: Finished difference Result 337 states and 457 transitions. [2020-10-26 19:14:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:14:37,830 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2020-10-26 19:14:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:37,833 INFO L225 Difference]: With dead ends: 337 [2020-10-26 19:14:37,834 INFO L226 Difference]: Without dead ends: 333 [2020-10-26 19:14:37,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=668, Invalid=3114, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:14:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-26 19:14:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 236. [2020-10-26 19:14:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-26 19:14:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 329 transitions. [2020-10-26 19:14:37,872 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 329 transitions. Word has length 38 [2020-10-26 19:14:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:37,872 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 329 transitions. [2020-10-26 19:14:37,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:14:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 329 transitions. [2020-10-26 19:14:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:14:37,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:37,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:37,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:14:37,874 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1342652549, now seen corresponding path program 1 times [2020-10-26 19:14:37,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:37,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141027762] [2020-10-26 19:14:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:37,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3003 [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:14:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:14:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:41,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:41,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:41,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:41,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:41,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:41,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:41,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:41,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:14:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:41,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:41,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:14:41,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:41,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:14:41,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:41,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:14:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:14:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:14:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:41,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:41,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:14:41,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:41,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:41,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:41,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:41,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141027762] [2020-10-26 19:14:41,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:41,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:14:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883695321] [2020-10-26 19:14:41,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:14:41,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:41,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:14:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:41,448 INFO L87 Difference]: Start difference. First operand 236 states and 329 transitions. Second operand 16 states. [2020-10-26 19:14:41,920 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-26 19:14:42,149 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-26 19:14:42,722 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-26 19:14:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:45,062 INFO L93 Difference]: Finished difference Result 373 states and 514 transitions. [2020-10-26 19:14:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:14:45,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:14:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:45,065 INFO L225 Difference]: With dead ends: 373 [2020-10-26 19:14:45,065 INFO L226 Difference]: Without dead ends: 347 [2020-10-26 19:14:45,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:14:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-26 19:14:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 229. [2020-10-26 19:14:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-26 19:14:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 314 transitions. [2020-10-26 19:14:45,111 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 314 transitions. Word has length 40 [2020-10-26 19:14:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:45,111 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 314 transitions. [2020-10-26 19:14:45,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:14:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 314 transitions. [2020-10-26 19:14:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:14:45,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:45,113 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:45,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:14:45,113 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1057787045, now seen corresponding path program 7 times [2020-10-26 19:14:45,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:45,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582391099] [2020-10-26 19:14:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:45,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:47,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:47,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:14:47,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:14:47,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-10-26 19:14:47,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:14:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:14:47,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:48,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:48,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:48,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:48,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:48,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:48,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:48,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:48,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:48,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:14:48,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582391099] [2020-10-26 19:14:48,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:48,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:14:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104646291] [2020-10-26 19:14:48,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:14:48,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:48,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:14:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:14:48,590 INFO L87 Difference]: Start difference. First operand 229 states and 314 transitions. Second operand 24 states. [2020-10-26 19:14:51,716 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-26 19:14:51,963 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-26 19:14:52,875 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-26 19:14:59,179 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-26 19:14:59,367 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-26 19:15:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:07,141 INFO L93 Difference]: Finished difference Result 732 states and 1021 transitions. [2020-10-26 19:15:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-10-26 19:15:07,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 40 [2020-10-26 19:15:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:07,149 INFO L225 Difference]: With dead ends: 732 [2020-10-26 19:15:07,150 INFO L226 Difference]: Without dead ends: 728 [2020-10-26 19:15:07,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8365 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=3042, Invalid=19910, Unknown=0, NotChecked=0, Total=22952 [2020-10-26 19:15:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-10-26 19:15:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 332. [2020-10-26 19:15:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-26 19:15:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 465 transitions. [2020-10-26 19:15:07,223 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 465 transitions. Word has length 40 [2020-10-26 19:15:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:07,223 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 465 transitions. [2020-10-26 19:15:07,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:15:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 465 transitions. [2020-10-26 19:15:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:15:07,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:07,225 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:07,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:15:07,225 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1291447444, now seen corresponding path program 4 times [2020-10-26 19:15:07,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:07,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220323746] [2020-10-26 19:15:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:07,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:09,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:09,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:10,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:10,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:10,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:10,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:12,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:15:12,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:15:12,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:15:12,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:15:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:15:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:12,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:12,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:12,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:12,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:12,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:12,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:12,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:15:12,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220323746] [2020-10-26 19:15:12,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:12,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:15:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175885032] [2020-10-26 19:15:12,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:15:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:15:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:15:12,723 INFO L87 Difference]: Start difference. First operand 332 states and 465 transitions. Second operand 19 states. [2020-10-26 19:15:14,007 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-26 19:15:14,310 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-26 19:15:14,611 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-26 19:15:14,866 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-26 19:15:17,235 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 19:15:17,763 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-26 19:15:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:17,958 INFO L93 Difference]: Finished difference Result 568 states and 779 transitions. [2020-10-26 19:15:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:15:17,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-26 19:15:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:17,962 INFO L225 Difference]: With dead ends: 568 [2020-10-26 19:15:17,963 INFO L226 Difference]: Without dead ends: 473 [2020-10-26 19:15:17,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=931, Invalid=3359, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:15:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-26 19:15:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 348. [2020-10-26 19:15:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-26 19:15:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 484 transitions. [2020-10-26 19:15:18,034 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 484 transitions. Word has length 41 [2020-10-26 19:15:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:18,035 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 484 transitions. [2020-10-26 19:15:18,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:15:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 484 transitions. [2020-10-26 19:15:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:15:18,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:18,037 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:18,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:15:18,038 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:18,038 INFO L82 PathProgramCache]: Analyzing trace with hash -201781346, now seen corresponding path program 2 times [2020-10-26 19:15:18,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:18,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117854240] [2020-10-26 19:15:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:18,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:21,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:21,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:15:21,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:15:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3340 [2020-10-26 19:15:21,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:15:21,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:21,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:15:21,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:21,679 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-26 19:15:21,821 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-26 19:15:22,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:22,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:22,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:22,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:22,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:22,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:22,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:22,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:22,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:22,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:22,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:22,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-26 19:15:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:22,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:22,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:15:22,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:22,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:15:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:22,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:22,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:22,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:15:22,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:22,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:15:22,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:22,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:15:22,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:22,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:15:22,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:22,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117854240] [2020-10-26 19:15:22,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:22,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:15:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402551408] [2020-10-26 19:15:22,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:15:22,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:15:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:15:22,428 INFO L87 Difference]: Start difference. First operand 348 states and 484 transitions. Second operand 22 states. [2020-10-26 19:15:27,826 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 19:15:30,800 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-26 19:15:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:31,796 INFO L93 Difference]: Finished difference Result 623 states and 838 transitions. [2020-10-26 19:15:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-26 19:15:31,798 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-26 19:15:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:31,802 INFO L225 Difference]: With dead ends: 623 [2020-10-26 19:15:31,802 INFO L226 Difference]: Without dead ends: 591 [2020-10-26 19:15:31,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1456, Invalid=6916, Unknown=0, NotChecked=0, Total=8372 [2020-10-26 19:15:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-26 19:15:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 339. [2020-10-26 19:15:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-26 19:15:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 468 transitions. [2020-10-26 19:15:31,892 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 468 transitions. Word has length 45 [2020-10-26 19:15:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:31,892 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 468 transitions. [2020-10-26 19:15:31,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:15:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 468 transitions. [2020-10-26 19:15:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:15:31,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:31,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:31,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:15:31,897 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1777282298, now seen corresponding path program 1 times [2020-10-26 19:15:31,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:31,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327020099] [2020-10-26 19:15:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:31,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:31,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:32,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 19:15:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:33,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:33,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:33,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:33,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:33,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:33,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:33,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:15:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:33,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:33,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:33,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:15:33,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:33,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:15:33,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:15:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:33,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:15:33,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:33,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:15:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:33,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:33,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:33,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:15:33,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327020099] [2020-10-26 19:15:33,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:33,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:15:33,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844542657] [2020-10-26 19:15:33,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:15:33,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:15:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:15:33,418 INFO L87 Difference]: Start difference. First operand 339 states and 468 transitions. Second operand 19 states. [2020-10-26 19:15:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:36,758 INFO L93 Difference]: Finished difference Result 629 states and 864 transitions. [2020-10-26 19:15:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:15:36,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-26 19:15:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:36,764 INFO L225 Difference]: With dead ends: 629 [2020-10-26 19:15:36,764 INFO L226 Difference]: Without dead ends: 625 [2020-10-26 19:15:36,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:15:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-26 19:15:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 494. [2020-10-26 19:15:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-26 19:15:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 694 transitions. [2020-10-26 19:15:36,883 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 694 transitions. Word has length 43 [2020-10-26 19:15:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:36,883 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 694 transitions. [2020-10-26 19:15:36,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:15:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 694 transitions. [2020-10-26 19:15:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:15:36,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:36,886 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:36,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:15:36,886 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1141573309, now seen corresponding path program 8 times [2020-10-26 19:15:36,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:36,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890157712] [2020-10-26 19:15:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:36,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:39,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:39,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:15:39,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2443 [2020-10-26 19:15:39,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:15:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:15:39,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:39,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:39,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:39,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:39,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:15:39,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:39,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:15:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:39,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890157712] [2020-10-26 19:15:39,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:39,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:15:39,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176857884] [2020-10-26 19:15:39,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:15:39,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:15:39,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:15:39,594 INFO L87 Difference]: Start difference. First operand 494 states and 694 transitions. Second operand 14 states. [2020-10-26 19:15:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:41,404 INFO L93 Difference]: Finished difference Result 796 states and 1111 transitions. [2020-10-26 19:15:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:15:41,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-26 19:15:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:41,411 INFO L225 Difference]: With dead ends: 796 [2020-10-26 19:15:41,411 INFO L226 Difference]: Without dead ends: 761 [2020-10-26 19:15:41,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:15:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2020-10-26 19:15:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 504. [2020-10-26 19:15:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-26 19:15:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 708 transitions. [2020-10-26 19:15:41,551 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 708 transitions. Word has length 42 [2020-10-26 19:15:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:41,551 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 708 transitions. [2020-10-26 19:15:41,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:15:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 708 transitions. [2020-10-26 19:15:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:15:41,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:41,554 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:41,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:15:41,554 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2096561452, now seen corresponding path program 1 times [2020-10-26 19:15:41,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:41,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470828904] [2020-10-26 19:15:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:41,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:41,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:45,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:45,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:15:45,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:15:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4202 [2020-10-26 19:15:45,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:15:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:45,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:15:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:15:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:15:46,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:15:46,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:15:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:15:46,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:15:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:46,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:15:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:15:46,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:15:46,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:15:46,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:15:46,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:15:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:15:46,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:46,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:46,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:15:46,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470828904] [2020-10-26 19:15:46,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:46,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:15:46,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395054833] [2020-10-26 19:15:46,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:15:46,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:46,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:15:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:15:46,118 INFO L87 Difference]: Start difference. First operand 504 states and 708 transitions. Second operand 14 states. [2020-10-26 19:15:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:47,441 INFO L93 Difference]: Finished difference Result 623 states and 851 transitions. [2020-10-26 19:15:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:15:47,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-26 19:15:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:47,446 INFO L225 Difference]: With dead ends: 623 [2020-10-26 19:15:47,446 INFO L226 Difference]: Without dead ends: 547 [2020-10-26 19:15:47,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:15:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-26 19:15:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 484. [2020-10-26 19:15:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-10-26 19:15:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 678 transitions. [2020-10-26 19:15:47,559 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 678 transitions. Word has length 53 [2020-10-26 19:15:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:47,560 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 678 transitions. [2020-10-26 19:15:47,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:15:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 678 transitions. [2020-10-26 19:15:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:15:47,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:47,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:47,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:15:47,562 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:47,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:47,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1844759063, now seen corresponding path program 3 times [2020-10-26 19:15:47,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:47,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470597845] [2020-10-26 19:15:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:47,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:48,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:52,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:52,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:15:52,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:15:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4469 [2020-10-26 19:15:52,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:15:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:15:52,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:52,491 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-26 19:15:53,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:53,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:53,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:53,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:53,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:53,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:53,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:53,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:53,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:53,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:53,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:15:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:53,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:53,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:15:53,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:53,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:15:53,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:15:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:15:53,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:53,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:15:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:53,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:15:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:15:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470597845] [2020-10-26 19:15:53,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:53,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:15:53,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524732770] [2020-10-26 19:15:53,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:15:53,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:53,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:15:53,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:15:53,427 INFO L87 Difference]: Start difference. First operand 484 states and 678 transitions. Second operand 24 states. [2020-10-26 19:15:53,944 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-26 19:15:54,138 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-26 19:15:54,412 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-26 19:15:54,624 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-26 19:15:55,176 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-26 19:15:55,344 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-26 19:15:59,719 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-26 19:16:00,205 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-26 19:16:00,512 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-26 19:16:00,773 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-26 19:16:00,988 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-26 19:16:01,170 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-26 19:16:03,520 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:16:03,833 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-26 19:16:04,269 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-26 19:16:04,473 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-26 19:16:04,855 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-26 19:16:05,340 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 19:16:06,079 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-26 19:16:08,495 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-26 19:16:08,774 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-26 19:16:09,078 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-26 19:16:09,301 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-26 19:16:09,512 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-26 19:16:09,758 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-26 19:16:09,917 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-26 19:16:10,263 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-26 19:16:10,424 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-26 19:16:10,618 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-26 19:16:11,375 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-26 19:16:11,608 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-26 19:16:11,796 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:16:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:12,265 INFO L93 Difference]: Finished difference Result 1022 states and 1419 transitions. [2020-10-26 19:16:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-26 19:16:12,266 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-26 19:16:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:12,274 INFO L225 Difference]: With dead ends: 1022 [2020-10-26 19:16:12,274 INFO L226 Difference]: Without dead ends: 981 [2020-10-26 19:16:12,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6264 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2455, Invalid=15101, Unknown=0, NotChecked=0, Total=17556 [2020-10-26 19:16:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2020-10-26 19:16:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 492. [2020-10-26 19:16:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-26 19:16:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 694 transitions. [2020-10-26 19:16:12,411 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 694 transitions. Word has length 50 [2020-10-26 19:16:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:12,412 INFO L481 AbstractCegarLoop]: Abstraction has 492 states and 694 transitions. [2020-10-26 19:16:12,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:16:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 694 transitions. [2020-10-26 19:16:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:16:12,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:12,414 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:12,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:16:12,414 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:12,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1540182520, now seen corresponding path program 1 times [2020-10-26 19:16:12,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:12,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746606389] [2020-10-26 19:16:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:12,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:12,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:13,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:13,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:13,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:17,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:17,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:16:17,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:16:17,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:16:17,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:16:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:17,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:16:17,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:18,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:18,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:18,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:18,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:18,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:18,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:18,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:18,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:18,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:16:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:18,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:18,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:16:18,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:18,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:18,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:18,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:18,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:16:18,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:18,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:18,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-26 19:16:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:18,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:18,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:16:18,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:16:18,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746606389] [2020-10-26 19:16:18,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:18,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:16:18,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957927864] [2020-10-26 19:16:18,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:16:18,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:16:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:16:18,132 INFO L87 Difference]: Start difference. First operand 492 states and 694 transitions. Second operand 16 states. [2020-10-26 19:16:18,677 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-26 19:16:18,955 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-26 19:16:19,718 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-26 19:16:20,024 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-26 19:16:20,645 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-26 19:16:20,862 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-26 19:16:21,231 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-26 19:16:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:22,143 INFO L93 Difference]: Finished difference Result 574 states and 786 transitions. [2020-10-26 19:16:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:16:22,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-26 19:16:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:22,150 INFO L225 Difference]: With dead ends: 574 [2020-10-26 19:16:22,150 INFO L226 Difference]: Without dead ends: 538 [2020-10-26 19:16:22,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:16:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-10-26 19:16:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 495. [2020-10-26 19:16:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-26 19:16:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 694 transitions. [2020-10-26 19:16:22,274 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 694 transitions. Word has length 46 [2020-10-26 19:16:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:22,274 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 694 transitions. [2020-10-26 19:16:22,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:16:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 694 transitions. [2020-10-26 19:16:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:16:22,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:22,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:22,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:16:22,276 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:22,277 INFO L82 PathProgramCache]: Analyzing trace with hash -492247800, now seen corresponding path program 9 times [2020-10-26 19:16:22,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:22,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448138667] [2020-10-26 19:16:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:22,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4091 [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:16:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:27,537 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2020-10-26 19:16:27,847 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-26 19:16:28,132 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-26 19:16:28,452 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-26 19:16:30,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:30,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:30,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:30,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:30,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:30,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:30,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:30,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:30,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:30,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:16:30,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448138667] [2020-10-26 19:16:30,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:30,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:16:30,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630291285] [2020-10-26 19:16:30,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:16:30,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:16:30,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:16:30,174 INFO L87 Difference]: Start difference. First operand 495 states and 694 transitions. Second operand 32 states. [2020-10-26 19:16:30,905 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-26 19:16:31,534 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-10-26 19:16:32,199 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-26 19:16:32,914 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-26 19:16:33,151 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-10-26 19:16:33,793 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-26 19:16:34,006 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-26 19:16:34,343 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-26 19:16:34,763 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-26 19:16:35,012 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-26 19:16:35,408 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-26 19:16:35,727 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-26 19:16:36,336 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-26 19:16:36,755 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-26 19:16:39,129 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-26 19:16:39,705 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:16:40,085 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-26 19:16:40,297 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 19:16:40,621 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-26 19:16:40,862 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:16:41,209 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-26 19:16:41,402 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-26 19:16:41,720 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-26 19:16:41,969 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-26 19:16:42,364 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-26 19:16:42,637 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-26 19:16:42,960 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-26 19:16:43,340 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-26 19:16:43,633 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-26 19:16:44,062 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-10-26 19:16:44,336 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-26 19:16:46,871 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:16:47,120 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-26 19:16:47,592 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-26 19:16:48,034 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-26 19:16:48,243 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-26 19:16:48,436 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 19:16:48,790 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-26 19:16:49,039 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:16:49,481 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-26 19:16:49,693 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-26 19:16:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:50,042 INFO L93 Difference]: Finished difference Result 1091 states and 1514 transitions. [2020-10-26 19:16:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-26 19:16:50,044 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2020-10-26 19:16:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:50,050 INFO L225 Difference]: With dead ends: 1091 [2020-10-26 19:16:50,050 INFO L226 Difference]: Without dead ends: 1087 [2020-10-26 19:16:50,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5484 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=2567, Invalid=12933, Unknown=0, NotChecked=0, Total=15500 [2020-10-26 19:16:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2020-10-26 19:16:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 636. [2020-10-26 19:16:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-10-26 19:16:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 897 transitions. [2020-10-26 19:16:50,178 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 897 transitions. Word has length 45 [2020-10-26 19:16:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:50,179 INFO L481 AbstractCegarLoop]: Abstraction has 636 states and 897 transitions. [2020-10-26 19:16:50,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:16:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 897 transitions. [2020-10-26 19:16:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:16:50,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:50,182 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:50,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:16:50,182 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:50,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1119387035, now seen corresponding path program 5 times [2020-10-26 19:16:50,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:50,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650841635] [2020-10-26 19:16:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:50,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:50,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:51,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:51,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:52,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:52,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:52,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:55,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:55,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:16:55,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:16:55,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:16:55,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:16:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:16:55,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:56,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:56,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:56,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:56,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:56,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:56,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:56,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:56,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:16:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650841635] [2020-10-26 19:16:56,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:56,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:16:56,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463228546] [2020-10-26 19:16:56,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:16:56,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:56,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:16:56,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:16:56,099 INFO L87 Difference]: Start difference. First operand 636 states and 897 transitions. Second operand 20 states. [2020-10-26 19:16:59,175 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-26 19:16:59,375 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-26 19:17:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:08,625 INFO L93 Difference]: Finished difference Result 1116 states and 1565 transitions. [2020-10-26 19:17:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-26 19:17:08,632 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-26 19:17:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:08,638 INFO L225 Difference]: With dead ends: 1116 [2020-10-26 19:17:08,638 INFO L226 Difference]: Without dead ends: 1099 [2020-10-26 19:17:08,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2934 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1544, Invalid=7576, Unknown=0, NotChecked=0, Total=9120 [2020-10-26 19:17:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-10-26 19:17:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 733. [2020-10-26 19:17:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-10-26 19:17:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1039 transitions. [2020-10-26 19:17:08,807 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1039 transitions. Word has length 46 [2020-10-26 19:17:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:08,807 INFO L481 AbstractCegarLoop]: Abstraction has 733 states and 1039 transitions. [2020-10-26 19:17:08,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:17:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1039 transitions. [2020-10-26 19:17:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:17:08,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:08,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:08,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:17:08,811 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:08,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1287783238, now seen corresponding path program 1 times [2020-10-26 19:17:08,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:08,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650551970] [2020-10-26 19:17:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:08,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:08,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking...