/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-fpi/condn.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:37:21,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:37:21,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:37:21,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:37:21,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:37:21,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:37:21,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:37:21,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:37:21,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:37:21,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:37:21,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:37:21,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:37:21,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:37:21,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:37:21,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:37:21,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:37:21,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:37:21,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:37:21,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:37:21,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:37:21,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:37:21,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:37:21,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:37:21,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:37:21,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:37:21,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:37:21,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:37:21,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:37:21,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:37:21,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:37:21,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:37:21,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:37:21,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:37:21,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:37:21,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:37:21,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:37:21,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:37:21,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:37:21,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:37:21,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:37:21,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:37:21,537 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 19:37:21,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:37:21,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:37:21,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:37:21,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:37:21,605 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:37:21,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:37:21,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:37:21,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:37:21,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:37:21,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:37:21,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:37:21,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:37:21,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:37:21,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:37:21,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:37:21,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:37:21,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:37:21,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:37:21,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:37:21,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:37:21,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:37:21,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:37:21,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:37:21,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:37:21,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:37:21,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:37:21,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:37:21,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:37:21,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:37:21,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:37:22,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:37:22,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:37:22,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:37:22,087 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:37:22,088 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:37:22,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condn.c [2020-10-26 19:37:22,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27a44ea82/90e95094385e49fc9fd5e86ce17fb509/FLAGb03a88e7e [2020-10-26 19:37:22,858 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:37:22,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condn.c [2020-10-26 19:37:22,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27a44ea82/90e95094385e49fc9fd5e86ce17fb509/FLAGb03a88e7e [2020-10-26 19:37:23,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27a44ea82/90e95094385e49fc9fd5e86ce17fb509 [2020-10-26 19:37:23,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:37:23,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:37:23,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:23,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:37:23,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:37:23,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe4e6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23, skipping insertion in model container [2020-10-26 19:37:23,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:37:23,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:37:23,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:23,504 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:37:23,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:23,541 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:37:23,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23 WrapperNode [2020-10-26 19:37:23,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:23,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:37:23,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:37:23,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:37:23,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (1/1) ... [2020-10-26 19:37:23,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:37:23,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:37:23,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:37:23,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:37:23,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (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 19:37:23,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:37:23,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:37:23,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:37:23,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:37:23,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:37:23,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:37:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:37:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:37:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:37:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:37:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:37:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:37:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:37:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:37:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:37:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:37:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:37:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:37:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:37:23,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:37:23,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:37:23,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:37:24,041 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:37:24,042 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:37:24,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:24 BoogieIcfgContainer [2020-10-26 19:37:24,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:37:24,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:37:24,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:37:24,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:37:24,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:37:23" (1/3) ... [2020-10-26 19:37:24,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369d993c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:24, skipping insertion in model container [2020-10-26 19:37:24,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:23" (2/3) ... [2020-10-26 19:37:24,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369d993c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:24, skipping insertion in model container [2020-10-26 19:37:24,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:24" (3/3) ... [2020-10-26 19:37:24,109 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2020-10-26 19:37:24,158 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:37:24,170 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:37:24,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:37:24,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:37:24,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:37:24,263 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:37:24,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:37:24,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:37:24,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:37:24,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:37:24,264 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:37:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-26 19:37:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:37:24,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:24,307 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] [2020-10-26 19:37:24,309 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash -603566119, now seen corresponding path program 1 times [2020-10-26 19:37:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:24,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576461092] [2020-10-26 19:37:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:24,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:25,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:37:25,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:37:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-26 19:37:25,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:25,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:37:25,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:25,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:37:25,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:37:25,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:25,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:25,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:25,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:25,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:25,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:25,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:25,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:25,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:25,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:25,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:25,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:25,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:25,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:37:25,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:25,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:25,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:25,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:25,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:25,519 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 19:37:25,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576461092] [2020-10-26 19:37:25,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:25,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:37:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583733456] [2020-10-26 19:37:25,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:37:25,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:25,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:37:25,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:37:25,549 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-10-26 19:37:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:25,826 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2020-10-26 19:37:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:37:25,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:37:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:25,838 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:37:25,838 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:37:25,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:37:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:37:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-10-26 19:37:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:37:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-26 19:37:25,893 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 23 [2020-10-26 19:37:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:25,894 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-26 19:37:25,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:37:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-26 19:37:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:25,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:25,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:25,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:37:25,896 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 493588519, now seen corresponding path program 1 times [2020-10-26 19:37:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:25,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105558711] [2020-10-26 19:37:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:26,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:26,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-26 19:37:26,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:26,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:37:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:37:26,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:37:26,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:26,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:26,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:26,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:26,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:26,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:27,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:27,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:27,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:27,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:27,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:27,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:27,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:27,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:27,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:27,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:27,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:27,015 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 19:37:27,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105558711] [2020-10-26 19:37:27,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:27,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:37:27,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803786983] [2020-10-26 19:37:27,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:37:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:37:27,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:37:27,020 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 14 states. [2020-10-26 19:37:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:28,029 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-26 19:37:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:37:28,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-26 19:37:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:28,035 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:37:28,035 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:37:28,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:37:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:37:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2020-10-26 19:37:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:37:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-26 19:37:28,066 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 28 [2020-10-26 19:37:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:28,066 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-26 19:37:28,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:37:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-26 19:37:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:28,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:28,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:28,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:37:28,070 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash 100561509, now seen corresponding path program 1 times [2020-10-26 19:37:28,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:28,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958853111] [2020-10-26 19:37:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:28,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:28,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:28,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:28,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-26 19:37:28,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:37:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:37:28,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:29,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:29,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:29,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:29,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:37:29,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:29,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:29,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:29,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:29,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:29,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:29,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:29,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:29,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:29,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:29,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:29,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:29,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:29,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:29,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:29,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958853111] [2020-10-26 19:37:29,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:29,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:37:29,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595860010] [2020-10-26 19:37:29,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:37:29,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:29,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:37:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:37:29,070 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 14 states. [2020-10-26 19:37:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:30,005 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-26 19:37:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:37:30,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-26 19:37:30,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:30,009 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:37:30,009 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:37:30,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:37:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:37:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 38. [2020-10-26 19:37:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:37:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:37:30,027 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2020-10-26 19:37:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:30,028 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:37:30,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:37:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:37:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:37:30,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:30,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:30,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:37:30,030 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1678212733, now seen corresponding path program 2 times [2020-10-26 19:37:30,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:30,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45623801] [2020-10-26 19:37:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:30,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:37:30,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:30,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-26 19:37:30,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:37:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:37:30,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:30,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:30,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:37:30,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:30,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:30,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:30,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:30,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:30,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:30,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,981 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 19:37:30,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45623801] [2020-10-26 19:37:30,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:30,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:37:30,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488077534] [2020-10-26 19:37:30,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:37:30,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:37:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:30,983 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-26 19:37:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:31,316 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-26 19:37:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:37:31,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-26 19:37:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:31,318 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:37:31,318 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:37:31,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:37:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-10-26 19:37:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:37:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:37:31,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2020-10-26 19:37:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:31,338 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:37:31,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:37:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:37:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:37:31,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:31,339 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] [2020-10-26 19:37:31,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:37:31,340 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1903668454, now seen corresponding path program 2 times [2020-10-26 19:37:31,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:31,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51403812] [2020-10-26 19:37:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:31,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:32,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:37:32,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:32,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-26 19:37:32,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:32,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:37:32,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:32,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:37:32,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:32,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:32,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:32,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:32,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:32,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:32,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:32,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:32,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:32,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:32,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:32,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:32,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:32,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:32,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:32,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:33,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51403812] [2020-10-26 19:37:33,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:33,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:37:33,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768628998] [2020-10-26 19:37:33,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:37:33,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:37:33,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:37:33,010 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 18 states. [2020-10-26 19:37:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:34,544 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-10-26 19:37:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:37:34,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-26 19:37:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:34,546 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:37:34,547 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:37:34,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:37:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:37:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2020-10-26 19:37:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:37:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-10-26 19:37:34,581 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 33 [2020-10-26 19:37:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:34,583 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-10-26 19:37:34,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:37:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-10-26 19:37:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:37:34,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:34,586 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:37:34,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:37:34,587 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1316862440, now seen corresponding path program 1 times [2020-10-26 19:37:34,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:34,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477850867] [2020-10-26 19:37:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:35,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:37:35,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:35,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-26 19:37:35,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:37:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:37:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:35,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:35,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:35,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:35,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:35,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:37:35,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:35,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:35,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:35,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:35,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:35,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:35,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:35,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:35,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:35,992 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 19:37:35,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477850867] [2020-10-26 19:37:35,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:35,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:37:35,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739330187] [2020-10-26 19:37:35,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:37:35,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:35,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:37:35,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:37:35,998 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 17 states. [2020-10-26 19:37:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:37,814 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-10-26 19:37:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:37:37,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-26 19:37:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:37,818 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:37:37,818 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:37:37,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=315, Invalid=1167, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:37:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:37:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 55. [2020-10-26 19:37:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:37:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-26 19:37:37,845 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 33 [2020-10-26 19:37:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:37,846 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-26 19:37:37,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:37:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-26 19:37:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:37:37,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:37,847 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, 1, 1, 1] [2020-10-26 19:37:37,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:37:37,848 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1403019400, now seen corresponding path program 3 times [2020-10-26 19:37:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:37,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727984435] [2020-10-26 19:37:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:37,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:39,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:37:39,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:39,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-10-26 19:37:39,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:39,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:37:39,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:39,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:37:39,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:39,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:39,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:39,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:39,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:39,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:39,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:39,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:39,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:39,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:39,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:39,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:39,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:39,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:39,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:39,743 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 19:37:39,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727984435] [2020-10-26 19:37:39,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:39,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:37:39,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095859930] [2020-10-26 19:37:39,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:37:39,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:39,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:37:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:37:39,746 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 10 states. [2020-10-26 19:37:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:40,337 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-10-26 19:37:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:37:40,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-26 19:37:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:40,340 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:37:40,340 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:37:40,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:37:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:37:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2020-10-26 19:37:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:37:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-26 19:37:40,356 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 35 [2020-10-26 19:37:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:40,356 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-26 19:37:40,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:37:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-26 19:37:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:37:40,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:40,358 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, 1, 1, 1] [2020-10-26 19:37:40,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:37:40,358 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2032680765, now seen corresponding path program 4 times [2020-10-26 19:37:40,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:40,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398351674] [2020-10-26 19:37:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:40,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:41,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:37:41,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-26 19:37:41,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:37:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:37:41,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:41,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:41,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:41,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:41,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:41,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:41,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:41,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:41,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:41,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:41,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:41,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:41,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:41,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:41,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:41,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:41,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:41,926 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 19:37:41,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398351674] [2020-10-26 19:37:41,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:41,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:37:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376663878] [2020-10-26 19:37:41,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:37:41,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:37:41,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:37:41,929 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 20 states. [2020-10-26 19:37:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:46,598 INFO L93 Difference]: Finished difference Result 286 states and 364 transitions. [2020-10-26 19:37:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-26 19:37:46,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-26 19:37:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:46,603 INFO L225 Difference]: With dead ends: 286 [2020-10-26 19:37:46,603 INFO L226 Difference]: Without dead ends: 283 [2020-10-26 19:37:46,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=938, Invalid=4612, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:37:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-26 19:37:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 110. [2020-10-26 19:37:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:37:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 146 transitions. [2020-10-26 19:37:46,664 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 146 transitions. Word has length 38 [2020-10-26 19:37:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:46,667 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 146 transitions. [2020-10-26 19:37:46,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:37:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 146 transitions. [2020-10-26 19:37:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:37:46,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:46,673 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-26 19:37:46,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:37:46,673 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:46,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:46,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1241218177, now seen corresponding path program 2 times [2020-10-26 19:37:46,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:46,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112973955] [2020-10-26 19:37:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:47,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:37:47,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:47,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-26 19:37:47,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:37:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:37:47,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:48,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:48,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:48,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:48,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:48,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:48,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:48,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:48,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:48,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:48,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:48,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:48,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:48,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:48,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:48,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:48,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:48,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:48,691 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 19:37:48,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112973955] [2020-10-26 19:37:48,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:48,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:37:48,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905627914] [2020-10-26 19:37:48,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:37:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:37:48,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:37:48,693 INFO L87 Difference]: Start difference. First operand 110 states and 146 transitions. Second operand 21 states. [2020-10-26 19:37:49,417 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-26 19:37:49,572 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-26 19:37:49,759 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-26 19:37:49,974 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-26 19:37:50,316 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-26 19:37:50,572 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-26 19:37:50,724 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-26 19:37:51,775 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-26 19:37:51,913 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-26 19:37:52,068 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-26 19:37:52,717 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 19:37:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:52,914 INFO L93 Difference]: Finished difference Result 173 states and 223 transitions. [2020-10-26 19:37:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:37:52,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-10-26 19:37:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:52,918 INFO L225 Difference]: With dead ends: 173 [2020-10-26 19:37:52,918 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:37:52,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:37:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:37:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 81. [2020-10-26 19:37:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:37:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-10-26 19:37:52,934 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 38 [2020-10-26 19:37:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:52,935 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-10-26 19:37:52,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:37:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-10-26 19:37:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:37:52,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:52,936 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:37:52,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:37:52,937 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2146708784, now seen corresponding path program 1 times [2020-10-26 19:37:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:52,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066912372] [2020-10-26 19:37:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:52,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:53,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:53,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:53,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:53,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:53,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-26 19:37:53,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:53,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:53,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:53,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:37:53,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:54,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:54,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:54,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:54,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:54,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:54,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:54,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:54,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:54,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:54,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:54,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:54,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:54,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:54,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:54,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:54,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:37:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:54,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:54,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:54,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:54,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:54,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:37:54,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:54,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:54,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:54,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:54,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066912372] [2020-10-26 19:37:54,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:54,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:37:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219730633] [2020-10-26 19:37:54,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:37:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:37:54,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:54,240 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 16 states. [2020-10-26 19:37:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:55,495 INFO L93 Difference]: Finished difference Result 162 states and 196 transitions. [2020-10-26 19:37:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:37:55,496 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-26 19:37:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:55,498 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:37:55,498 INFO L226 Difference]: Without dead ends: 159 [2020-10-26 19:37:55,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:37:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-26 19:37:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 102. [2020-10-26 19:37:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:37:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2020-10-26 19:37:55,527 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 41 [2020-10-26 19:37:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:55,527 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2020-10-26 19:37:55,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:37:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2020-10-26 19:37:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:37:55,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:55,531 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:37:55,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:37:55,532 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash 154113806, now seen corresponding path program 1 times [2020-10-26 19:37:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:55,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517541405] [2020-10-26 19:37:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:56,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:56,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-26 19:37:56,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:56,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:37:56,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:56,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:56,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:56,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:56,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:56,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:56,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:56,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:56,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:56,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:37:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:56,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:56,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:56,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:56,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:56,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517541405] [2020-10-26 19:37:56,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:56,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:37:56,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438882844] [2020-10-26 19:37:56,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:37:56,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:56,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:37:56,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:37:56,888 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand 15 states. [2020-10-26 19:37:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:58,045 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2020-10-26 19:37:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:37:58,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-26 19:37:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:58,048 INFO L225 Difference]: With dead ends: 175 [2020-10-26 19:37:58,048 INFO L226 Difference]: Without dead ends: 172 [2020-10-26 19:37:58,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:37:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-26 19:37:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 97. [2020-10-26 19:37:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:37:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2020-10-26 19:37:58,067 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 41 [2020-10-26 19:37:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:58,067 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2020-10-26 19:37:58,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:37:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2020-10-26 19:37:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:58,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:58,069 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-26 19:37:58,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:37:58,069 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 146521631, now seen corresponding path program 3 times [2020-10-26 19:37:58,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:58,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970440971] [2020-10-26 19:37:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:58,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:59,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:59,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:59,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1154 [2020-10-26 19:37:59,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:37:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:37:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:37:59,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:59,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:59,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:59,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:59,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:59,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:59,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:59,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:59,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:59,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:59,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:59,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:59,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:59,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:59,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:59,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:59,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:59,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:59,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970440971] [2020-10-26 19:37:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:59,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:37:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399659227] [2020-10-26 19:37:59,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:37:59,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:37:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:37:59,384 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand 12 states. [2020-10-26 19:38:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:00,208 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2020-10-26 19:38:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:38:00,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-26 19:38:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:00,211 INFO L225 Difference]: With dead ends: 180 [2020-10-26 19:38:00,211 INFO L226 Difference]: Without dead ends: 161 [2020-10-26 19:38:00,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:38:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-26 19:38:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 100. [2020-10-26 19:38:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:38:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2020-10-26 19:38:00,231 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 40 [2020-10-26 19:38:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:00,231 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2020-10-26 19:38:00,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:38:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2020-10-26 19:38:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:38:00,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:00,232 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:00,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:38:00,233 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:00,233 INFO L82 PathProgramCache]: Analyzing trace with hash 577234892, now seen corresponding path program 4 times [2020-10-26 19:38:00,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:00,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602190626] [2020-10-26 19:38:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:03,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:38:03,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:38:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2856 [2020-10-26 19:38:03,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:38:03,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:03,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:38:03,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:04,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:04,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:04,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:04,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:04,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:04,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:04,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:04,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:04,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:04,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:04,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:04,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:04,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:04,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:04,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:04,450 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 19:38:04,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602190626] [2020-10-26 19:38:04,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:04,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:38:04,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848845789] [2020-10-26 19:38:04,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:38:04,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:38:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:38:04,452 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 23 states. [2020-10-26 19:38:05,024 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-26 19:38:05,612 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-26 19:38:07,830 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-26 19:38:08,042 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-26 19:38:08,970 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-26 19:38:10,405 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-26 19:38:10,587 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-26 19:38:10,909 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-26 19:38:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:11,352 INFO L93 Difference]: Finished difference Result 317 states and 405 transitions. [2020-10-26 19:38:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-26 19:38:11,353 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-26 19:38:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:11,356 INFO L225 Difference]: With dead ends: 317 [2020-10-26 19:38:11,356 INFO L226 Difference]: Without dead ends: 314 [2020-10-26 19:38:11,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1043, Invalid=4809, Unknown=0, NotChecked=0, Total=5852 [2020-10-26 19:38:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-26 19:38:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 106. [2020-10-26 19:38:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:38:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2020-10-26 19:38:11,385 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 43 [2020-10-26 19:38:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:11,385 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2020-10-26 19:38:11,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:38:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2020-10-26 19:38:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:38:11,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:11,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-10-26 19:38:11,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:38:11,386 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:11,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1220327853, now seen corresponding path program 2 times [2020-10-26 19:38:11,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:11,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374963447] [2020-10-26 19:38:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:11,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:13,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:38:13,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:13,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-26 19:38:13,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:38:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:38:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:13,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:13,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:13,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:13,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:13,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:13,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:13,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:13,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:13,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:13,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:13,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:13,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:13,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:13,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:13,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:13,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:13,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:13,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:38:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:13,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:13,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:13,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374963447] [2020-10-26 19:38:13,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:13,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:38:13,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149702026] [2020-10-26 19:38:13,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:38:13,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:13,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:38:13,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:38:13,820 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand 22 states. [2020-10-26 19:38:14,317 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2020-10-26 19:38:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:17,130 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2020-10-26 19:38:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:38:17,130 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-26 19:38:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:17,133 INFO L225 Difference]: With dead ends: 247 [2020-10-26 19:38:17,133 INFO L226 Difference]: Without dead ends: 244 [2020-10-26 19:38:17,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=517, Invalid=2345, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:38:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-26 19:38:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 154. [2020-10-26 19:38:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:38:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2020-10-26 19:38:17,168 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 46 [2020-10-26 19:38:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:17,169 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2020-10-26 19:38:17,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:38:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2020-10-26 19:38:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:38:17,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:17,170 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:38:17,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:38:17,170 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:17,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1643029679, now seen corresponding path program 2 times [2020-10-26 19:38:17,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:17,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999111225] [2020-10-26 19:38:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:17,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:18,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:38:18,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:38:18,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-26 19:38:18,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:18,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:38:18,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:18,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:38:18,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:19,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:19,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:19,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:19,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:19,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:19,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:19,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:19,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:19,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:19,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:19,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:19,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:19,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:38:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:19,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:19,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:19,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:19,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:19,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:19,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:19,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:19,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:19,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999111225] [2020-10-26 19:38:19,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:19,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:38:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078342573] [2020-10-26 19:38:19,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:38:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:38:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:38:19,322 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand 22 states. [2020-10-26 19:38:21,643 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-26 19:38:22,963 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-26 19:38:23,221 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-26 19:38:24,745 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-26 19:38:25,570 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-26 19:38:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:26,457 INFO L93 Difference]: Finished difference Result 376 states and 469 transitions. [2020-10-26 19:38:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-26 19:38:26,458 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-26 19:38:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:26,462 INFO L225 Difference]: With dead ends: 376 [2020-10-26 19:38:26,462 INFO L226 Difference]: Without dead ends: 373 [2020-10-26 19:38:26,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1120, Invalid=6190, Unknown=0, NotChecked=0, Total=7310 [2020-10-26 19:38:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-26 19:38:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 214. [2020-10-26 19:38:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-26 19:38:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 271 transitions. [2020-10-26 19:38:26,526 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 271 transitions. Word has length 46 [2020-10-26 19:38:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:26,527 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 271 transitions. [2020-10-26 19:38:26,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:38:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 271 transitions. [2020-10-26 19:38:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:38:26,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:26,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 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 19:38:26,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:38:26,528 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:26,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1807353618, now seen corresponding path program 5 times [2020-10-26 19:38:26,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:26,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037729269] [2020-10-26 19:38:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:26,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:28,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:38:28,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:28,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1713 [2020-10-26 19:38:28,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:38:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:28,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:38:28,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:28,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:28,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:28,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:28,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:28,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:28,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:28,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:28,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:28,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:28,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037729269] [2020-10-26 19:38:28,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:28,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:38:28,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024478974] [2020-10-26 19:38:28,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:38:28,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:38:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:38:28,435 INFO L87 Difference]: Start difference. First operand 214 states and 271 transitions. Second operand 14 states. [2020-10-26 19:38:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:29,541 INFO L93 Difference]: Finished difference Result 392 states and 483 transitions. [2020-10-26 19:38:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:38:29,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-26 19:38:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:29,544 INFO L225 Difference]: With dead ends: 392 [2020-10-26 19:38:29,545 INFO L226 Difference]: Without dead ends: 359 [2020-10-26 19:38:29,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:38:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-26 19:38:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 297. [2020-10-26 19:38:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-26 19:38:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 372 transitions. [2020-10-26 19:38:29,639 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 372 transitions. Word has length 45 [2020-10-26 19:38:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:29,639 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 372 transitions. [2020-10-26 19:38:29,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:38:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 372 transitions. [2020-10-26 19:38:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:38:29,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:29,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-26 19:38:29,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:38:29,641 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:29,641 INFO L82 PathProgramCache]: Analyzing trace with hash 624455354, now seen corresponding path program 3 times [2020-10-26 19:38:29,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:29,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16102841] [2020-10-26 19:38:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:29,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:38:30,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:30,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-26 19:38:30,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:38:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:38:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:30,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:38:30,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:30,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:30,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:30,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:30,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:38:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:30,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:30,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:30,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:38:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:30,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:30,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:30,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:30,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:30,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:30,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:38:30,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16102841] [2020-10-26 19:38:30,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:30,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:38:30,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129965382] [2020-10-26 19:38:30,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:38:30,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:38:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:38:30,616 INFO L87 Difference]: Start difference. First operand 297 states and 372 transitions. Second operand 10 states. [2020-10-26 19:38:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:31,298 INFO L93 Difference]: Finished difference Result 413 states and 494 transitions. [2020-10-26 19:38:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:38:31,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-26 19:38:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:31,301 INFO L225 Difference]: With dead ends: 413 [2020-10-26 19:38:31,301 INFO L226 Difference]: Without dead ends: 247 [2020-10-26 19:38:31,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:38:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-26 19:38:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 216. [2020-10-26 19:38:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-26 19:38:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 265 transitions. [2020-10-26 19:38:31,393 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 265 transitions. Word has length 49 [2020-10-26 19:38:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:31,393 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 265 transitions. [2020-10-26 19:38:31,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:38:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 265 transitions. [2020-10-26 19:38:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:38:31,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:31,394 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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 19:38:31,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:38:31,394 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:31,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1759572893, now seen corresponding path program 6 times [2020-10-26 19:38:31,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:31,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344229933] [2020-10-26 19:38:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:31,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3187 [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:38:34,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:35,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:35,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:35,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:35,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:35,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:35,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:35,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:35,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:35,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:35,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:35,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:35,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:35,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:35,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:35,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:35,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344229933] [2020-10-26 19:38:35,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:35,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:38:35,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310123721] [2020-10-26 19:38:35,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:38:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:38:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:38:35,831 INFO L87 Difference]: Start difference. First operand 216 states and 265 transitions. Second operand 25 states. [2020-10-26 19:38:36,483 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 24 [2020-10-26 19:38:37,782 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-26 19:38:42,014 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-26 19:38:42,657 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2020-10-26 19:38:42,822 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-26 19:38:43,268 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2020-10-26 19:38:43,458 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:38:44,264 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2020-10-26 19:38:44,664 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-26 19:38:45,289 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-10-26 19:38:45,644 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-10-26 19:38:46,116 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-26 19:38:46,535 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-26 19:38:46,708 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2020-10-26 19:38:47,000 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-26 19:38:47,196 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-26 19:38:47,373 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2020-10-26 19:38:48,274 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-26 19:38:48,587 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-26 19:38:49,014 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-26 19:38:49,187 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-26 19:38:49,349 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-26 19:38:50,230 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-26 19:38:50,390 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-26 19:38:50,552 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-26 19:38:50,850 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-26 19:38:51,486 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-26 19:38:51,665 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-26 19:38:51,841 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-26 19:38:52,168 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-26 19:38:52,819 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-26 19:38:53,107 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-26 19:38:53,384 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-26 19:38:53,912 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-26 19:38:55,040 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:38:55,211 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-26 19:38:55,374 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-26 19:38:55,686 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-26 19:38:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:58,302 INFO L93 Difference]: Finished difference Result 973 states and 1317 transitions. [2020-10-26 19:38:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2020-10-26 19:38:58,303 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-10-26 19:38:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:58,311 INFO L225 Difference]: With dead ends: 973 [2020-10-26 19:38:58,311 INFO L226 Difference]: Without dead ends: 970 [2020-10-26 19:38:58,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10997 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=4059, Invalid=24333, Unknown=0, NotChecked=0, Total=28392 [2020-10-26 19:38:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-26 19:38:58,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 427. [2020-10-26 19:38:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-26 19:38:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 590 transitions. [2020-10-26 19:38:58,450 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 590 transitions. Word has length 48 [2020-10-26 19:38:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:58,450 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 590 transitions. [2020-10-26 19:38:58,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:38:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 590 transitions. [2020-10-26 19:38:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:38:58,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:58,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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 19:38:58,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:38:58,453 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1923512675, now seen corresponding path program 7 times [2020-10-26 19:38:58,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:58,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238139501] [2020-10-26 19:38:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2638 [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:39:01,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:01,937 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-26 19:39:03,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:03,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:03,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:03,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:03,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:03,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:03,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238139501] [2020-10-26 19:39:03,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:03,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:39:03,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766826782] [2020-10-26 19:39:03,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:39:03,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:03,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:39:03,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:39:03,080 INFO L87 Difference]: Start difference. First operand 427 states and 590 transitions. Second operand 29 states. [2020-10-26 19:39:03,423 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 19:39:03,742 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 19:39:04,220 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2020-10-26 19:39:04,423 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 19:39:04,786 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-26 19:39:05,064 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-26 19:39:05,435 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-26 19:39:05,577 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-26 19:39:05,760 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-26 19:39:06,043 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-10-26 19:39:06,319 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-26 19:39:06,813 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-26 19:39:06,954 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-26 19:39:07,124 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-26 19:39:07,424 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-10-26 19:39:07,698 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-26 19:39:08,081 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-26 19:39:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:08,742 INFO L93 Difference]: Finished difference Result 590 states and 795 transitions. [2020-10-26 19:39:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:39:08,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-10-26 19:39:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:08,748 INFO L225 Difference]: With dead ends: 590 [2020-10-26 19:39:08,748 INFO L226 Difference]: Without dead ends: 587 [2020-10-26 19:39:08,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1086, Invalid=3744, Unknown=0, NotChecked=0, Total=4830 [2020-10-26 19:39:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-26 19:39:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 240. [2020-10-26 19:39:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-26 19:39:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 296 transitions. [2020-10-26 19:39:08,828 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 296 transitions. Word has length 48 [2020-10-26 19:39:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:08,829 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 296 transitions. [2020-10-26 19:39:08,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:39:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 296 transitions. [2020-10-26 19:39:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:39:08,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:08,830 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-26 19:39:08,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:39:08,830 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2063882700, now seen corresponding path program 4 times [2020-10-26 19:39:08,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:08,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415694536] [2020-10-26 19:39:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:08,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:12,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:39:12,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:39:12,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3403 [2020-10-26 19:39:12,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:39:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:39:12,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:13,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:13,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:13,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:13,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:13,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:13,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:13,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:13,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:13,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:13,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:13,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:13,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:39:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:13,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:13,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:13,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:13,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:13,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:13,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:13,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:13,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:13,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415694536] [2020-10-26 19:39:13,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:13,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:39:13,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721610555] [2020-10-26 19:39:13,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:39:13,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:39:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:39:13,342 INFO L87 Difference]: Start difference. First operand 240 states and 296 transitions. Second operand 24 states. [2020-10-26 19:39:13,865 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-26 19:39:14,115 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-26 19:39:14,380 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-26 19:39:17,596 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-26 19:39:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:19,752 INFO L93 Difference]: Finished difference Result 533 states and 664 transitions. [2020-10-26 19:39:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-26 19:39:19,753 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-10-26 19:39:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:19,756 INFO L225 Difference]: With dead ends: 533 [2020-10-26 19:39:19,756 INFO L226 Difference]: Without dead ends: 530 [2020-10-26 19:39:19,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1267, Invalid=7105, Unknown=0, NotChecked=0, Total=8372 [2020-10-26 19:39:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-26 19:39:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 250. [2020-10-26 19:39:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-26 19:39:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2020-10-26 19:39:19,845 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 51 [2020-10-26 19:39:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:19,845 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2020-10-26 19:39:19,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:39:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2020-10-26 19:39:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:39:19,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:19,851 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2020-10-26 19:39:19,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:39:19,851 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash 236939890, now seen corresponding path program 3 times [2020-10-26 19:39:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:19,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63111376] [2020-10-26 19:39:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:22,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:22,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:39:22,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:39:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2495 [2020-10-26 19:39:22,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:22,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:39:22,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:22,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:39:22,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:23,056 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-26 19:39:23,240 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-26 19:39:23,444 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-26 19:39:23,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:23,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:23,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:23,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:23,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:23,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:39:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:23,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:23,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:23,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:23,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:39:23,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:23,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:23,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63111376] [2020-10-26 19:39:23,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:23,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:39:23,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744446254] [2020-10-26 19:39:23,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:39:23,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:39:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:39:23,678 INFO L87 Difference]: Start difference. First operand 250 states and 317 transitions. Second operand 24 states. [2020-10-26 19:39:23,863 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-26 19:39:26,908 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-26 19:39:27,434 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-26 19:39:28,377 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-26 19:39:29,599 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-26 19:39:30,293 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-26 19:39:30,614 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 19:39:31,244 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-26 19:39:31,661 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-26 19:39:32,216 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-26 19:39:32,403 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 19:39:32,775 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-26 19:39:33,263 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-26 19:39:33,451 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 19:39:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:33,499 INFO L93 Difference]: Finished difference Result 430 states and 541 transitions. [2020-10-26 19:39:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-26 19:39:33,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-10-26 19:39:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:33,503 INFO L225 Difference]: With dead ends: 430 [2020-10-26 19:39:33,503 INFO L226 Difference]: Without dead ends: 389 [2020-10-26 19:39:33,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1468, Invalid=8038, Unknown=0, NotChecked=0, Total=9506 [2020-10-26 19:39:33,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-26 19:39:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 269. [2020-10-26 19:39:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-26 19:39:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 345 transitions. [2020-10-26 19:39:33,596 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 345 transitions. Word has length 51 [2020-10-26 19:39:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:33,596 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 345 transitions. [2020-10-26 19:39:33,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:39:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 345 transitions. [2020-10-26 19:39:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:39:33,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:33,597 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2020-10-26 19:39:33,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:39:33,598 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1641180874, now seen corresponding path program 4 times [2020-10-26 19:39:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:33,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258651803] [2020-10-26 19:39:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:33,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1370 [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:39:34,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:35,552 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-26 19:39:36,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:36,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:36,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:36,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:36,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:36,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:36,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:36,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:36,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:36,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:36,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:36,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:36,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:36,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:36,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:36,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:36,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:39:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:36,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:36,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:36,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:36,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:36,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:36,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258651803] [2020-10-26 19:39:36,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:36,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:39:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522155995] [2020-10-26 19:39:36,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:39:36,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:39:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:39:36,163 INFO L87 Difference]: Start difference. First operand 269 states and 345 transitions. Second operand 26 states. [2020-10-26 19:39:36,694 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-10-26 19:39:37,046 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-10-26 19:39:39,073 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-26 19:39:39,709 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-26 19:39:39,950 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-26 19:39:40,534 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-26 19:39:40,776 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-26 19:39:41,016 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-26 19:39:41,505 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-26 19:39:41,815 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-26 19:39:42,040 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-26 19:39:42,315 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-26 19:39:43,130 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-26 19:39:43,383 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-26 19:39:43,611 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-26 19:39:44,063 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-26 19:39:44,261 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-26 19:39:44,809 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-26 19:39:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:47,109 INFO L93 Difference]: Finished difference Result 436 states and 548 transitions. [2020-10-26 19:39:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-26 19:39:47,113 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-10-26 19:39:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:47,116 INFO L225 Difference]: With dead ends: 436 [2020-10-26 19:39:47,116 INFO L226 Difference]: Without dead ends: 433 [2020-10-26 19:39:47,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3619 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1789, Invalid=9553, Unknown=0, NotChecked=0, Total=11342 [2020-10-26 19:39:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-26 19:39:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 230. [2020-10-26 19:39:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-26 19:39:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 291 transitions. [2020-10-26 19:39:47,198 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 291 transitions. Word has length 51 [2020-10-26 19:39:47,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:47,198 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 291 transitions. [2020-10-26 19:39:47,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:39:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 291 transitions. [2020-10-26 19:39:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:39:47,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:47,199 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 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 19:39:47,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:39:47,200 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1372960837, now seen corresponding path program 8 times [2020-10-26 19:39:47,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:47,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784836296] [2020-10-26 19:39:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:48,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:48,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:39:48,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:39:48,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1684 [2020-10-26 19:39:48,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:39:48,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:48,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:39:48,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:49,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:49,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:49,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:49,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:49,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:49,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:49,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:49,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:49,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:49,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:49,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:49,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:49,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:49,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:49,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:49,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784836296] [2020-10-26 19:39:49,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:49,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865255777] [2020-10-26 19:39:49,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:49,137 INFO L87 Difference]: Start difference. First operand 230 states and 291 transitions. Second operand 16 states. [2020-10-26 19:39:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:50,941 INFO L93 Difference]: Finished difference Result 437 states and 548 transitions. [2020-10-26 19:39:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:39:50,943 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-26 19:39:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:50,945 INFO L225 Difference]: With dead ends: 437 [2020-10-26 19:39:50,945 INFO L226 Difference]: Without dead ends: 404 [2020-10-26 19:39:50,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:39:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-26 19:39:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 285. [2020-10-26 19:39:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-26 19:39:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 359 transitions. [2020-10-26 19:39:51,072 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 359 transitions. Word has length 50 [2020-10-26 19:39:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:51,072 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 359 transitions. [2020-10-26 19:39:51,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 359 transitions. [2020-10-26 19:39:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:39:51,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:51,074 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:39:51,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:39:51,074 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash 190247321, now seen corresponding path program 5 times [2020-10-26 19:39:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:51,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298405103] [2020-10-26 19:39:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:51,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:51,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:39:52,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:52,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:52,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:52,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:52,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:52,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:52,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:52,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:52,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:52,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:39:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:52,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:52,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:52,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:52,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:52,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:52,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:52,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:39:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:52,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:52,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:52,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:39:52,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:52,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:39:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298405103] [2020-10-26 19:39:52,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:39:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671892741] [2020-10-26 19:39:52,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:39:52,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:39:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:39:52,679 INFO L87 Difference]: Start difference. First operand 285 states and 359 transitions. Second operand 18 states. [2020-10-26 19:39:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:55,039 INFO L93 Difference]: Finished difference Result 441 states and 544 transitions. [2020-10-26 19:39:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:39:55,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-26 19:39:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:55,046 INFO L225 Difference]: With dead ends: 441 [2020-10-26 19:39:55,046 INFO L226 Difference]: Without dead ends: 367 [2020-10-26 19:39:55,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:39:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-26 19:39:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 311. [2020-10-26 19:39:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-26 19:39:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 384 transitions. [2020-10-26 19:39:55,177 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 384 transitions. Word has length 54 [2020-10-26 19:39:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:55,177 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 384 transitions. [2020-10-26 19:39:55,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:39:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 384 transitions. [2020-10-26 19:39:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:39:55,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:55,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:39:55,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:39:55,179 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash 252286935, now seen corresponding path program 6 times [2020-10-26 19:39:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:55,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654411507] [2020-10-26 19:39:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:57,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:39:57,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:39:57,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1818 [2020-10-26 19:39:57,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:39:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:39:57,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:57,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:57,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:57,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:57,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:57,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:57,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:57,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:57,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:57,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:57,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:57,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:57,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:57,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:57,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:39:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:57,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:57,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:39:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:57,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:57,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:39:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654411507] [2020-10-26 19:39:57,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:57,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:39:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261719972] [2020-10-26 19:39:57,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:39:57,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:39:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:39:57,701 INFO L87 Difference]: Start difference. First operand 311 states and 384 transitions. Second operand 19 states. [2020-10-26 19:39:58,702 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-26 19:39:59,144 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-26 19:40:00,855 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-26 19:40:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:01,239 INFO L93 Difference]: Finished difference Result 423 states and 517 transitions. [2020-10-26 19:40:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:40:01,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-26 19:40:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:01,244 INFO L225 Difference]: With dead ends: 423 [2020-10-26 19:40:01,244 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 19:40:01,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:40:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 19:40:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 282. [2020-10-26 19:40:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-26 19:40:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 354 transitions. [2020-10-26 19:40:01,375 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 354 transitions. Word has length 54 [2020-10-26 19:40:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:01,375 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 354 transitions. [2020-10-26 19:40:01,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:40:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 354 transitions. [2020-10-26 19:40:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:40:01,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:01,377 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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 19:40:01,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:40:01,377 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1470857748, now seen corresponding path program 9 times [2020-10-26 19:40:01,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:01,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645820358] [2020-10-26 19:40:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:01,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:02,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:02,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:02,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:02,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:05,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:05,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:40:05,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:40:05,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3820 [2020-10-26 19:40:05,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:40:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:40:05,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:06,704 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 44 [2020-10-26 19:40:07,133 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 47 [2020-10-26 19:40:07,521 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 46 [2020-10-26 19:40:07,912 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-26 19:40:08,325 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-26 19:40:08,717 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-26 19:40:08,948 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 26 [2020-10-26 19:40:09,379 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 26 [2020-10-26 19:40:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:10,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:10,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:10,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:10,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:10,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:10,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:10,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:10,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:10,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:10,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 20 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:10,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645820358] [2020-10-26 19:40:10,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:10,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:40:10,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572125559] [2020-10-26 19:40:10,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:40:10,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:10,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:40:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:40:10,031 INFO L87 Difference]: Start difference. First operand 282 states and 354 transitions. Second operand 34 states. [2020-10-26 19:40:10,416 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-26 19:40:10,717 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-26 19:40:11,148 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-10-26 19:40:11,318 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-26 19:40:11,502 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-26 19:40:11,722 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-10-26 19:40:11,900 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-26 19:40:12,068 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-26 19:40:12,267 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-26 19:40:12,669 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-26 19:40:12,836 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-26 19:40:13,031 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-26 19:40:13,237 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-26 19:40:13,452 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-26 19:40:13,623 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-26 19:40:13,927 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-26 19:40:14,162 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-26 19:40:14,425 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:40:14,853 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-26 19:40:14,999 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-26 19:40:15,239 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-26 19:40:15,477 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-26 19:40:15,733 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-26 19:40:15,977 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-26 19:40:16,130 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-26 19:40:16,361 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-26 19:40:16,582 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-26 19:40:16,840 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-26 19:40:17,081 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-26 19:40:17,802 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-26 19:40:17,947 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-26 19:40:18,222 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-26 19:40:18,433 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-26 19:40:18,693 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-26 19:40:18,937 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-26 19:40:19,265 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-26 19:40:19,527 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-26 19:40:19,680 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-26 19:40:19,925 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-26 19:40:20,187 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-26 19:40:20,538 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-26 19:40:21,525 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-26 19:40:21,689 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 19:40:22,058 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-26 19:40:22,307 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-26 19:40:22,602 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-26 19:40:22,907 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-26 19:40:23,227 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-26 19:40:23,633 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-26 19:40:23,950 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-26 19:40:24,132 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 19:40:24,397 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-26 19:40:24,715 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-26 19:40:25,049 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-26 19:40:25,344 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-26 19:40:26,331 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-26 19:40:26,685 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-26 19:40:26,973 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-26 19:40:27,340 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-26 19:40:27,735 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 19:40:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:28,258 INFO L93 Difference]: Finished difference Result 752 states and 985 transitions. [2020-10-26 19:40:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-26 19:40:28,260 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 53 [2020-10-26 19:40:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:28,263 INFO L225 Difference]: With dead ends: 752 [2020-10-26 19:40:28,263 INFO L226 Difference]: Without dead ends: 749 [2020-10-26 19:40:28,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5531 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=2972, Invalid=12034, Unknown=0, NotChecked=0, Total=15006 [2020-10-26 19:40:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-10-26 19:40:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 320. [2020-10-26 19:40:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-26 19:40:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 403 transitions. [2020-10-26 19:40:28,408 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 403 transitions. Word has length 53 [2020-10-26 19:40:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:28,408 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 403 transitions. [2020-10-26 19:40:28,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:40:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 403 transitions. [2020-10-26 19:40:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:40:28,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:28,410 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-26 19:40:28,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:40:28,410 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1313181049, now seen corresponding path program 7 times [2020-10-26 19:40:28,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:28,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305765597] [2020-10-26 19:40:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:33,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:40:33,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:40:33,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4867 [2020-10-26 19:40:33,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:33,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:40:33,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:33,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:40:33,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:34,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:34,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:34,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:34,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:34,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:34,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:34,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:34,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:34,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:40:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:34,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:40:34,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305765597] [2020-10-26 19:40:34,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:34,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:40:34,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321343601] [2020-10-26 19:40:34,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:40:34,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:40:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:40:34,297 INFO L87 Difference]: Start difference. First operand 320 states and 403 transitions. Second operand 25 states. [2020-10-26 19:40:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:53,758 INFO L93 Difference]: Finished difference Result 742 states and 943 transitions. [2020-10-26 19:40:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2020-10-26 19:40:53,760 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-26 19:40:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:53,764 INFO L225 Difference]: With dead ends: 742 [2020-10-26 19:40:53,765 INFO L226 Difference]: Without dead ends: 739 [2020-10-26 19:40:53,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11708 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=4039, Invalid=27113, Unknown=0, NotChecked=0, Total=31152 [2020-10-26 19:40:53,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-26 19:40:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 263. [2020-10-26 19:40:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-26 19:40:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 334 transitions. [2020-10-26 19:40:53,852 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 334 transitions. Word has length 56 [2020-10-26 19:40:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:53,852 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 334 transitions. [2020-10-26 19:40:53,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:40:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 334 transitions. [2020-10-26 19:40:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:40:53,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:53,854 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 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 19:40:53,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:40:53,854 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash -755954546, now seen corresponding path program 10 times [2020-10-26 19:40:53,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:53,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85370675] [2020-10-26 19:40:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:56,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:56,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:40:56,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:40:56,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2647 [2020-10-26 19:40:56,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:56,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:40:56,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:56,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:40:56,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:56,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:56,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:56,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:56,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:56,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:56,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:56,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:56,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:56,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:56,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:56,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:56,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:56,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:56,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85370675] [2020-10-26 19:40:56,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:56,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:40:56,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242089050] [2020-10-26 19:40:56,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:40:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:56,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:40:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:40:56,879 INFO L87 Difference]: Start difference. First operand 263 states and 334 transitions. Second operand 18 states. [2020-10-26 19:40:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:59,497 INFO L93 Difference]: Finished difference Result 493 states and 624 transitions. [2020-10-26 19:40:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:40:59,498 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-26 19:40:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:59,501 INFO L225 Difference]: With dead ends: 493 [2020-10-26 19:40:59,501 INFO L226 Difference]: Without dead ends: 460 [2020-10-26 19:40:59,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:40:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-26 19:40:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 332. [2020-10-26 19:40:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-26 19:40:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 421 transitions. [2020-10-26 19:40:59,613 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 421 transitions. Word has length 55 [2020-10-26 19:40:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:59,613 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 421 transitions. [2020-10-26 19:40:59,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:40:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 421 transitions. [2020-10-26 19:40:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:40:59,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:59,615 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:59,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:40:59,615 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash 492871198, now seen corresponding path program 5 times [2020-10-26 19:40:59,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:59,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714415675] [2020-10-26 19:40:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:59,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:59,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2316 [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:41:01,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:02,835 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-26 19:41:03,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:03,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:03,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:03,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:03,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:03,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:03,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:03,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:03,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:41:03,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:03,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:03,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:03,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:03,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:03,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:41:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:03,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:03,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:41:03,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:03,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:41:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:03,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:03,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:03,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:03,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:03,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:41:03,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:41:03,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:03,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:41:03,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:41:03,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714415675] [2020-10-26 19:41:03,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:03,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:41:03,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751830956] [2020-10-26 19:41:03,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:41:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:41:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:41:03,135 INFO L87 Difference]: Start difference. First operand 332 states and 421 transitions. Second operand 22 states.