/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:29:20,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:29:20,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:29:20,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:29:20,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:29:20,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:29:20,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:29:20,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:29:20,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:29:20,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:29:20,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:29:20,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:29:20,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:29:20,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:29:20,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:29:20,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:29:20,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:29:20,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:29:20,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:29:20,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:29:20,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:29:20,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:29:20,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:29:20,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:29:20,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:29:20,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:29:20,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:29:20,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:29:20,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:29:20,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:29:20,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:29:20,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:29:20,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:29:20,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:29:20,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:29:20,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:29:20,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:29:20,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:29:20,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:29:20,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:29:20,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:29:20,545 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 19:29:20,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:29:20,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:29:20,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:29:20,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:29:20,608 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:29:20,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:29:20,609 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:29:20,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:29:20,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:29:20,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:29:20,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:29:20,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:29:20,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:29:20,612 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:29:20,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:29:20,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:29:20,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:29:20,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:29:20,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:29:20,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:29:20,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:29:20,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:20,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:29:20,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:29:20,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:29:20,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:29:20,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:29:20,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:29:20,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:29:20,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:29:21,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:29:21,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:29:21,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:29:21,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:29:21,118 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:29:21,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2020-10-26 19:29:21,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db185c75a/1bac8296cfa24cd193f6b9b8a27711b9/FLAGee287c8dd [2020-10-26 19:29:21,796 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:29:21,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2020-10-26 19:29:21,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db185c75a/1bac8296cfa24cd193f6b9b8a27711b9/FLAGee287c8dd [2020-10-26 19:29:22,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db185c75a/1bac8296cfa24cd193f6b9b8a27711b9 [2020-10-26 19:29:22,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:29:22,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:29:22,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:22,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:29:22,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:29:22,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a48f637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22, skipping insertion in model container [2020-10-26 19:29:22,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:29:22,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:29:22,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:22,410 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:29:22,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:22,452 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:29:22,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22 WrapperNode [2020-10-26 19:29:22,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:22,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:29:22,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:29:22,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:29:22,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (1/1) ... [2020-10-26 19:29:22,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:29:22,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:29:22,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:29:22,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:29:22,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (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 19:29:22,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:29:22,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:29:22,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:29:22,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:29:22,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:29:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:29:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:29:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:29:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:29:22,588 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:29:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:29:22,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:29:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:29:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:29:22,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:29:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:29:22,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:29:22,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:29:22,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:29:22,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:29:23,199 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:29:23,199 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:29:23,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:23 BoogieIcfgContainer [2020-10-26 19:29:23,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:29:23,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:29:23,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:29:23,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:29:23,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:29:22" (1/3) ... [2020-10-26 19:29:23,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abd343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:23, skipping insertion in model container [2020-10-26 19:29:23,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:22" (2/3) ... [2020-10-26 19:29:23,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abd343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:23, skipping insertion in model container [2020-10-26 19:29:23,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:23" (3/3) ... [2020-10-26 19:29:23,216 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2020-10-26 19:29:23,231 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:29:23,237 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:29:23,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:29:23,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:29:23,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:29:23,303 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:29:23,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:29:23,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:29:23,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:29:23,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:29:23,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:29:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:29:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:23,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:23,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:23,341 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2137803700, now seen corresponding path program 1 times [2020-10-26 19:29:23,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:23,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391710248] [2020-10-26 19:29:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:23,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:23,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:23,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:23,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:23,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:23,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-26 19:29:23,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:23,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:29:24,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:24,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:24,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:24,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:29:24,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:24,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:24,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:24,068 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 19:29:24,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391710248] [2020-10-26 19:29:24,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:24,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:29:24,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883788450] [2020-10-26 19:29:24,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:24,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:24,118 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-26 19:29:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:24,282 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2020-10-26 19:29:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:24,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-26 19:29:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:24,294 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:29:24,295 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:29:24,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:29:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-26 19:29:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:29:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-26 19:29:24,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 17 [2020-10-26 19:29:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:24,350 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-26 19:29:24,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-26 19:29:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:29:24,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:24,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:24,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:29:24,353 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1719889192, now seen corresponding path program 1 times [2020-10-26 19:29:24,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:24,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928472095] [2020-10-26 19:29:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:25,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:29:25,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:25,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 989 [2020-10-26 19:29:25,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:25,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:29:25,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:25,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:29:25,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:25,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:25,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:25,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:25,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:25,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:25,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:25,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:25,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:25,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:25,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:25,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928472095] [2020-10-26 19:29:25,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:25,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:29:25,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287834205] [2020-10-26 19:29:25,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:29:25,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:29:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:25,552 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 10 states. [2020-10-26 19:29:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:25,947 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-10-26 19:29:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:29:25,948 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-26 19:29:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:25,950 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:29:25,950 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:29:25,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:29:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:29:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2020-10-26 19:29:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:29:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-26 19:29:25,966 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 20 [2020-10-26 19:29:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:25,967 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-26 19:29:25,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:29:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-26 19:29:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:29:25,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:25,969 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] [2020-10-26 19:29:25,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:29:25,969 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash 786393820, now seen corresponding path program 1 times [2020-10-26 19:29:25,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:25,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429603433] [2020-10-26 19:29:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:27,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:29:27,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:27,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1841 [2020-10-26 19:29:27,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:27,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:29:27,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:27,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:29:27,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:28,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:28,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:28,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:28,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:28,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:28,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:28,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:28,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:28,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:28,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429603433] [2020-10-26 19:29:28,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:28,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:29:28,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487676141] [2020-10-26 19:29:28,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:29:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:29:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:28,092 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 11 states. [2020-10-26 19:29:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:28,507 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-26 19:29:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:29:28,508 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-26 19:29:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:28,511 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:29:28,511 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:29:28,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:29:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:29:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-26 19:29:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:29:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-26 19:29:28,528 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 22 [2020-10-26 19:29:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:28,529 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-26 19:29:28,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:29:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-26 19:29:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:29:28,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:28,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:28,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:29:28,531 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -57447013, now seen corresponding path program 2 times [2020-10-26 19:29:28,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:28,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761088349] [2020-10-26 19:29:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:29,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:29:29,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:29,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-26 19:29:29,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:29,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:29,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:29,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:29:29,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:29,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:29,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:30,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:30,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:30,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:30,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:30,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:30,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:30,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:30,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,007 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 19:29:30,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761088349] [2020-10-26 19:29:30,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:30,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:30,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488080577] [2020-10-26 19:29:30,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:30,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:30,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:30,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:30,010 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 12 states. [2020-10-26 19:29:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:30,419 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-10-26 19:29:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:29:30,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-26 19:29:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:30,421 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:29:30,421 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:29:30,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:29:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:29:30,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-10-26 19:29:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:29:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-26 19:29:30,437 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 23 [2020-10-26 19:29:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:30,437 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-26 19:29:30,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-26 19:29:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:29:30,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:30,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:30,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:29:30,439 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash 665493727, now seen corresponding path program 2 times [2020-10-26 19:29:30,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:30,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275944329] [2020-10-26 19:29:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:32,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:29:32,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:32,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2202 [2020-10-26 19:29:32,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:32,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:29:32,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:32,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:29:32,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:32,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:32,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:32,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:32,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:32,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275944329] [2020-10-26 19:29:32,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:32,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:29:32,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47516313] [2020-10-26 19:29:32,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:29:32,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:29:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:32,932 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 11 states. [2020-10-26 19:29:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:33,550 INFO L93 Difference]: Finished difference Result 194 states and 246 transitions. [2020-10-26 19:29:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:29:33,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-26 19:29:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:33,553 INFO L225 Difference]: With dead ends: 194 [2020-10-26 19:29:33,554 INFO L226 Difference]: Without dead ends: 137 [2020-10-26 19:29:33,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:29:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-26 19:29:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 64. [2020-10-26 19:29:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:29:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-26 19:29:33,572 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 25 [2020-10-26 19:29:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:33,573 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-26 19:29:33,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:29:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-26 19:29:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:29:33,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:33,574 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:29:33,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:29:33,575 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:33,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1828723132, now seen corresponding path program 1 times [2020-10-26 19:29:33,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:33,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337210776] [2020-10-26 19:29:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:33,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:33,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:29:34,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:34,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-26 19:29:34,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:34,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:34,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:29:34,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:34,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:34,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:34,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:34,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:34,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-26 19:29:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:29:34,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:34,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:34,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:34,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:34,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:29:34,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337210776] [2020-10-26 19:29:34,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:34,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:29:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977756785] [2020-10-26 19:29:34,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:34,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:34,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:34,535 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 7 states. [2020-10-26 19:29:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:34,704 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2020-10-26 19:29:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:29:34,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-26 19:29:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:34,706 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:29:34,706 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:29:34,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:29:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-26 19:29:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:29:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-26 19:29:34,722 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 30 [2020-10-26 19:29:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:34,722 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-26 19:29:34,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-26 19:29:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:29:34,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:34,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:34,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:29:34,725 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1284762978, now seen corresponding path program 1 times [2020-10-26 19:29:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:34,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964134673] [2020-10-26 19:29:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:29:39,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:29:39,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:39,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:29:39,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:39,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:39,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:39,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:39,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:39,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:29:39,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964134673] [2020-10-26 19:29:39,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:39,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:29:39,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677560530] [2020-10-26 19:29:39,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:39,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:39,789 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 5 states. [2020-10-26 19:29:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:39,888 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2020-10-26 19:29:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:39,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-26 19:29:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:39,890 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:29:39,890 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:29:39,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:29:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2020-10-26 19:29:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:29:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2020-10-26 19:29:39,920 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 30 [2020-10-26 19:29:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:39,921 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2020-10-26 19:29:39,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2020-10-26 19:29:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:29:39,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:39,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:39,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:29:39,923 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1538456768, now seen corresponding path program 2 times [2020-10-26 19:29:39,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:39,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615608394] [2020-10-26 19:29:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:42,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:44,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:29:44,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:44,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:29:44,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:44,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:29:44,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:44,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:29:44,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:45,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:45,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:45,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:45,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:45,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:45,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:29:45,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:45,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:45,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:29:45,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615608394] [2020-10-26 19:29:45,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:45,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:29:45,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61999973] [2020-10-26 19:29:45,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:29:45,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:29:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:45,044 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 8 states. [2020-10-26 19:29:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:45,264 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2020-10-26 19:29:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:29:45,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-26 19:29:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:45,267 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:29:45,267 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:29:45,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:29:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2020-10-26 19:29:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:29:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2020-10-26 19:29:45,289 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 32 [2020-10-26 19:29:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:45,289 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2020-10-26 19:29:45,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:29:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2020-10-26 19:29:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:29:45,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:45,295 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:45,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:29:45,296 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:45,296 INFO L82 PathProgramCache]: Analyzing trace with hash -150486974, now seen corresponding path program 1 times [2020-10-26 19:29:45,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:45,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563728185] [2020-10-26 19:29:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:45,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:45,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:45,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:45,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:50,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:50,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:29:50,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:29:50,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:29:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:29:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:50,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:50,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:50,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:50,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:50,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:29:50,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563728185] [2020-10-26 19:29:50,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:50,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:29:50,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058763038] [2020-10-26 19:29:50,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:29:50,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:29:50,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:29:50,629 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 13 states. [2020-10-26 19:29:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:51,149 INFO L93 Difference]: Finished difference Result 158 states and 199 transitions. [2020-10-26 19:29:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:29:51,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-26 19:29:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:51,152 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:29:51,152 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:29:51,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:29:51,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:29:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 88. [2020-10-26 19:29:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:29:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2020-10-26 19:29:51,184 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 32 [2020-10-26 19:29:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:51,187 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2020-10-26 19:29:51,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:29:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2020-10-26 19:29:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:29:51,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:51,188 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] [2020-10-26 19:29:51,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:29:51,188 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:51,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2015565791, now seen corresponding path program 2 times [2020-10-26 19:29:51,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:51,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650542641] [2020-10-26 19:29:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:51,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:53,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:55,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:55,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:29:55,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:55,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3983 [2020-10-26 19:29:55,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:55,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:29:55,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:55,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:29:55,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:55,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:55,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:55,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:55,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:55,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:55,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:55,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:55,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:29:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:55,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:55,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:29:55,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:55,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:55,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:29:55,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650542641] [2020-10-26 19:29:55,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:55,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:29:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397357175] [2020-10-26 19:29:55,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:29:55,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:29:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:29:55,415 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand 13 states. [2020-10-26 19:29:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:56,162 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2020-10-26 19:29:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:29:56,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:29:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:56,165 INFO L225 Difference]: With dead ends: 131 [2020-10-26 19:29:56,165 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:29:56,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:29:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:29:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2020-10-26 19:29:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:29:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2020-10-26 19:29:56,191 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 35 [2020-10-26 19:29:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:56,191 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2020-10-26 19:29:56,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:29:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2020-10-26 19:29:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:29:56,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:56,194 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:56,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:29:56,195 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:56,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1839556933, now seen corresponding path program 2 times [2020-10-26 19:29:56,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:56,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012577980] [2020-10-26 19:29:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:01,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:01,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:30:01,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:01,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:30:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:30:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:30:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:01,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:01,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:01,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:01,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:01,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:01,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:30:01,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:30:01,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012577980] [2020-10-26 19:30:01,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:01,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:30:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065132813] [2020-10-26 19:30:01,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:30:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:30:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:30:01,520 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand 12 states. [2020-10-26 19:30:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:02,143 INFO L93 Difference]: Finished difference Result 177 states and 226 transitions. [2020-10-26 19:30:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:30:02,144 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-26 19:30:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:02,146 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:30:02,146 INFO L226 Difference]: Without dead ends: 163 [2020-10-26 19:30:02,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-26 19:30:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 104. [2020-10-26 19:30:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:30:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2020-10-26 19:30:02,164 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 35 [2020-10-26 19:30:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:02,164 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2020-10-26 19:30:02,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:30:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2020-10-26 19:30:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:30:02,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:02,165 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] [2020-10-26 19:30:02,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:30:02,166 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1742888433, now seen corresponding path program 1 times [2020-10-26 19:30:02,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:02,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760249820] [2020-10-26 19:30:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:02,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:04,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:04,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:30:07,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:07,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:07,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:07,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:07,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:07,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:07,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:07,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:07,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:30:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:07,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:07,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:07,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:07,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:07,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:30:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:07,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:30:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760249820] [2020-10-26 19:30:07,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:07,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:30:07,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583518781] [2020-10-26 19:30:07,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:30:07,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:30:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:30:07,259 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand 7 states. [2020-10-26 19:30:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:07,448 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-26 19:30:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:30:07,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-26 19:30:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:07,450 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:30:07,451 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:30:07,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:30:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:30:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2020-10-26 19:30:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:30:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2020-10-26 19:30:07,467 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 37 [2020-10-26 19:30:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:07,468 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2020-10-26 19:30:07,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:30:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2020-10-26 19:30:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:30:07,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:07,469 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:30:07,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:30:07,469 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:07,470 INFO L82 PathProgramCache]: Analyzing trace with hash -162499962, now seen corresponding path program 3 times [2020-10-26 19:30:07,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:07,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044974613] [2020-10-26 19:30:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:07,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:12,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:12,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:30:12,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:12,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:30:12,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:30:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:30:12,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:12,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:12,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:12,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:12,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:12,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:12,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:12,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:12,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:12,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:12,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:12,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:12,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-26 19:30:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:12,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:12,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:12,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:12,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:30:12,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:30:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:12,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:30:12,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:30:13,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044974613] [2020-10-26 19:30:13,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:13,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:30:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937566983] [2020-10-26 19:30:13,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:30:13,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:13,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:30:13,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:13,037 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand 16 states. [2020-10-26 19:30:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:14,387 INFO L93 Difference]: Finished difference Result 188 states and 241 transitions. [2020-10-26 19:30:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:30:14,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-26 19:30:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:14,392 INFO L225 Difference]: With dead ends: 188 [2020-10-26 19:30:14,392 INFO L226 Difference]: Without dead ends: 184 [2020-10-26 19:30:14,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:30:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-26 19:30:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 125. [2020-10-26 19:30:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:30:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2020-10-26 19:30:14,432 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 38 [2020-10-26 19:30:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:14,432 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2020-10-26 19:30:14,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:30:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2020-10-26 19:30:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:30:14,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:14,434 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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 19:30:14,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:30:14,435 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:14,435 INFO L82 PathProgramCache]: Analyzing trace with hash -867010848, now seen corresponding path program 3 times [2020-10-26 19:30:14,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:14,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346887986] [2020-10-26 19:30:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:19,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:30:19,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:19,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4555 [2020-10-26 19:30:19,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:30:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:30:19,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:19,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:19,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:19,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:19,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:19,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:30:19,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346887986] [2020-10-26 19:30:19,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:19,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:30:19,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146992960] [2020-10-26 19:30:19,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:30:19,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:19,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:30:19,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:30:19,079 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand 6 states. [2020-10-26 19:30:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:19,224 INFO L93 Difference]: Finished difference Result 260 states and 337 transitions. [2020-10-26 19:30:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:30:19,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-26 19:30:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:19,226 INFO L225 Difference]: With dead ends: 260 [2020-10-26 19:30:19,226 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:30:19,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:30:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:30:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-10-26 19:30:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:30:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 169 transitions. [2020-10-26 19:30:19,254 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 169 transitions. Word has length 38 [2020-10-26 19:30:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:19,254 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 169 transitions. [2020-10-26 19:30:19,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:30:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 169 transitions. [2020-10-26 19:30:19,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:30:19,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:19,256 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:19,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:30:19,256 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash 220602114, now seen corresponding path program 4 times [2020-10-26 19:30:19,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:19,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342525311] [2020-10-26 19:30:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:30:24,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:30:24,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:30:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:24,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:30:24,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:24,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:24,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:24,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:24,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:24,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:24,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:30:24,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342525311] [2020-10-26 19:30:24,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:24,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:30:24,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626825639] [2020-10-26 19:30:24,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:30:24,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:30:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:30:24,340 INFO L87 Difference]: Start difference. First operand 132 states and 169 transitions. Second operand 7 states. [2020-10-26 19:30:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:24,508 INFO L93 Difference]: Finished difference Result 288 states and 374 transitions. [2020-10-26 19:30:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:30:24,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-26 19:30:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:24,511 INFO L225 Difference]: With dead ends: 288 [2020-10-26 19:30:24,511 INFO L226 Difference]: Without dead ends: 169 [2020-10-26 19:30:24,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:30:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-26 19:30:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 144. [2020-10-26 19:30:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:30:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 183 transitions. [2020-10-26 19:30:24,537 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 183 transitions. Word has length 40 [2020-10-26 19:30:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:24,538 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 183 transitions. [2020-10-26 19:30:24,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:30:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 183 transitions. [2020-10-26 19:30:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:30:24,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:24,540 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:24,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:30:24,541 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1739605668, now seen corresponding path program 5 times [2020-10-26 19:30:24,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:24,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307206900] [2020-10-26 19:30:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:30:29,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:29,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:29,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:29,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:29,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:29,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:29,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:29,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:29,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-26 19:30:29,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307206900] [2020-10-26 19:30:29,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:29,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:30:29,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289034118] [2020-10-26 19:30:29,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:30:29,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:30:29,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:29,738 INFO L87 Difference]: Start difference. First operand 144 states and 183 transitions. Second operand 13 states. [2020-10-26 19:30:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:30,431 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2020-10-26 19:30:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:30:30,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-26 19:30:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:30,439 INFO L225 Difference]: With dead ends: 264 [2020-10-26 19:30:30,439 INFO L226 Difference]: Without dead ends: 250 [2020-10-26 19:30:30,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-26 19:30:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 164. [2020-10-26 19:30:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-26 19:30:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 212 transitions. [2020-10-26 19:30:30,475 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 212 transitions. Word has length 42 [2020-10-26 19:30:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:30,476 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 212 transitions. [2020-10-26 19:30:30,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:30:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 212 transitions. [2020-10-26 19:30:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:30:30,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:30,479 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] [2020-10-26 19:30:30,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:30:30,479 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:30,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2010872765, now seen corresponding path program 4 times [2020-10-26 19:30:30,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:30,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722296582] [2020-10-26 19:30:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:30,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:35,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:30:35,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:30:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:30:35,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:35,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:35,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:35,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:35,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:35,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:35,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:35,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:35,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:35,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:30:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:35,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:30:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:30:35,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722296582] [2020-10-26 19:30:35,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:35,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:30:35,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743935055] [2020-10-26 19:30:35,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:30:35,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:35,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:30:35,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:35,832 INFO L87 Difference]: Start difference. First operand 164 states and 212 transitions. Second operand 16 states. [2020-10-26 19:30:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:37,261 INFO L93 Difference]: Finished difference Result 268 states and 344 transitions. [2020-10-26 19:30:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:30:37,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-26 19:30:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:37,264 INFO L225 Difference]: With dead ends: 268 [2020-10-26 19:30:37,264 INFO L226 Difference]: Without dead ends: 264 [2020-10-26 19:30:37,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:30:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-26 19:30:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 195. [2020-10-26 19:30:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-26 19:30:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 253 transitions. [2020-10-26 19:30:37,292 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 253 transitions. Word has length 45 [2020-10-26 19:30:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:37,292 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 253 transitions. [2020-10-26 19:30:37,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:30:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 253 transitions. [2020-10-26 19:30:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:30:37,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:37,294 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] [2020-10-26 19:30:37,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:30:37,294 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:37,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2143545921, now seen corresponding path program 1 times [2020-10-26 19:30:37,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:37,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889076287] [2020-10-26 19:30:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:37,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:30:42,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:42,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:42,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:42,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:42,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:42,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:30:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:42,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:42,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:42,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:30:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:42,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 19:30:42,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889076287] [2020-10-26 19:30:42,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:42,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:30:42,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410380569] [2020-10-26 19:30:42,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:30:42,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:42,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:30:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:30:42,384 INFO L87 Difference]: Start difference. First operand 195 states and 253 transitions. Second operand 8 states. [2020-10-26 19:30:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:42,570 INFO L93 Difference]: Finished difference Result 445 states and 588 transitions. [2020-10-26 19:30:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:30:42,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-26 19:30:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:42,575 INFO L225 Difference]: With dead ends: 445 [2020-10-26 19:30:42,575 INFO L226 Difference]: Without dead ends: 265 [2020-10-26 19:30:42,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:30:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-26 19:30:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2020-10-26 19:30:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-26 19:30:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 289 transitions. [2020-10-26 19:30:42,611 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 289 transitions. Word has length 45 [2020-10-26 19:30:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:42,611 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 289 transitions. [2020-10-26 19:30:42,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:30:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 289 transitions. [2020-10-26 19:30:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:42,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:42,612 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:42,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:30:42,613 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:42,613 INFO L82 PathProgramCache]: Analyzing trace with hash 183511735, now seen corresponding path program 6 times [2020-10-26 19:30:42,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:42,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656085851] [2020-10-26 19:30:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:47,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:47,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:47,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:47,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:30:47,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:30:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:30:47,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:47,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:47,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:47,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:47,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:30:47,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656085851] [2020-10-26 19:30:47,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:47,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:30:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692176102] [2020-10-26 19:30:47,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:30:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:30:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:30:47,723 INFO L87 Difference]: Start difference. First operand 225 states and 289 transitions. Second operand 9 states. [2020-10-26 19:30:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:47,932 INFO L93 Difference]: Finished difference Result 525 states and 692 transitions. [2020-10-26 19:30:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:30:47,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-26 19:30:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:47,936 INFO L225 Difference]: With dead ends: 525 [2020-10-26 19:30:47,936 INFO L226 Difference]: Without dead ends: 317 [2020-10-26 19:30:47,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:30:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-26 19:30:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 267. [2020-10-26 19:30:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-26 19:30:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 343 transitions. [2020-10-26 19:30:47,982 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 343 transitions. Word has length 47 [2020-10-26 19:30:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:47,982 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 343 transitions. [2020-10-26 19:30:47,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:30:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 343 transitions. [2020-10-26 19:30:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:30:47,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:47,985 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] [2020-10-26 19:30:47,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:30:47,985 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1418032939, now seen corresponding path program 7 times [2020-10-26 19:30:47,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:47,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182289725] [2020-10-26 19:30:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:48,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:49,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:50,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:53,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:30:53,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:30:53,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:30:53,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:30:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 19:30:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:53,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:53,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:53,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:53,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:53,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:53,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:53,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-26 19:30:53,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182289725] [2020-10-26 19:30:53,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:53,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:30:53,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126923898] [2020-10-26 19:30:53,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:30:53,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:30:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:53,418 INFO L87 Difference]: Start difference. First operand 267 states and 343 transitions. Second operand 14 states. [2020-10-26 19:30:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:54,307 INFO L93 Difference]: Finished difference Result 408 states and 529 transitions. [2020-10-26 19:30:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:30:54,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-26 19:30:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:54,311 INFO L225 Difference]: With dead ends: 408 [2020-10-26 19:30:54,311 INFO L226 Difference]: Without dead ends: 394 [2020-10-26 19:30:54,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:30:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-26 19:30:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 286. [2020-10-26 19:30:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-26 19:30:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 371 transitions. [2020-10-26 19:30:54,346 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 371 transitions. Word has length 49 [2020-10-26 19:30:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:54,346 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 371 transitions. [2020-10-26 19:30:54,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:30:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 371 transitions. [2020-10-26 19:30:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:30:54,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:54,348 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:54,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:30:54,348 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1948933816, now seen corresponding path program 8 times [2020-10-26 19:30:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:54,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400461566] [2020-10-26 19:30:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:59,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:30:59,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:30:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:30:59,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:30:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:30:59,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:59,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:59,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:59,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:59,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:59,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:59,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:59,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:59,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:59,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:30:59,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400461566] [2020-10-26 19:30:59,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:59,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:30:59,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66147902] [2020-10-26 19:30:59,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:30:59,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:30:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:30:59,470 INFO L87 Difference]: Start difference. First operand 286 states and 371 transitions. Second operand 10 states. [2020-10-26 19:30:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:59,692 INFO L93 Difference]: Finished difference Result 670 states and 891 transitions. [2020-10-26 19:30:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:30:59,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-26 19:30:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:59,696 INFO L225 Difference]: With dead ends: 670 [2020-10-26 19:30:59,696 INFO L226 Difference]: Without dead ends: 403 [2020-10-26 19:30:59,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:30:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-26 19:30:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 337. [2020-10-26 19:30:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-26 19:30:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 437 transitions. [2020-10-26 19:30:59,733 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 437 transitions. Word has length 52 [2020-10-26 19:30:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:59,734 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 437 transitions. [2020-10-26 19:30:59,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:30:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 437 transitions. [2020-10-26 19:30:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:30:59,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:59,735 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:59,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:30:59,736 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:59,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1279747562, now seen corresponding path program 9 times [2020-10-26 19:30:59,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:59,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733317825] [2020-10-26 19:30:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:59,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:31:04,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:04,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:04,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:04,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:04,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-26 19:31:04,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733317825] [2020-10-26 19:31:04,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:04,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:31:04,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579418632] [2020-10-26 19:31:04,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:31:04,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:04,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:31:04,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:31:04,827 INFO L87 Difference]: Start difference. First operand 337 states and 437 transitions. Second operand 6 states. [2020-10-26 19:31:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:04,988 INFO L93 Difference]: Finished difference Result 356 states and 456 transitions. [2020-10-26 19:31:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:31:04,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-26 19:31:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:04,991 INFO L225 Difference]: With dead ends: 356 [2020-10-26 19:31:04,991 INFO L226 Difference]: Without dead ends: 345 [2020-10-26 19:31:04,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:31:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-26 19:31:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2020-10-26 19:31:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-26 19:31:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 436 transitions. [2020-10-26 19:31:05,028 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 436 transitions. Word has length 54 [2020-10-26 19:31:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:05,029 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 436 transitions. [2020-10-26 19:31:05,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:31:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 436 transitions. [2020-10-26 19:31:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:31:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:05,031 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:05,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:31:05,031 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash 268813168, now seen corresponding path program 5 times [2020-10-26 19:31:05,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:05,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369665981] [2020-10-26 19:31:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:05,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:05,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:10,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:31:10,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:31:10,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:31:10,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:10,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:31:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:31:10,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:10,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:10,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:10,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:31:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:10,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:10,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:10,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 19:31:10,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369665981] [2020-10-26 19:31:10,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:10,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:31:10,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866270927] [2020-10-26 19:31:10,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:31:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:31:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:31:10,177 INFO L87 Difference]: Start difference. First operand 337 states and 436 transitions. Second operand 11 states. [2020-10-26 19:31:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:10,435 INFO L93 Difference]: Finished difference Result 781 states and 1036 transitions. [2020-10-26 19:31:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:31:10,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-26 19:31:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:10,440 INFO L225 Difference]: With dead ends: 781 [2020-10-26 19:31:10,440 INFO L226 Difference]: Without dead ends: 465 [2020-10-26 19:31:10,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:31:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-26 19:31:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 378. [2020-10-26 19:31:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-26 19:31:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 490 transitions. [2020-10-26 19:31:10,480 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 490 transitions. Word has length 60 [2020-10-26 19:31:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:10,481 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 490 transitions. [2020-10-26 19:31:10,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:31:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 490 transitions. [2020-10-26 19:31:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:31:10,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:10,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:10,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:31:10,483 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash 550503157, now seen corresponding path program 6 times [2020-10-26 19:31:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:10,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738534270] [2020-10-26 19:31:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:15,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:15,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:31:15,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:31:15,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:31:15,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:15,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:31:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:31:15,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:16,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:16,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:16,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:16,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:16,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:16,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:16,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:16,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:16,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:31:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:16,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:16,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:16,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:16,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:16,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:16,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:16,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-26 19:31:16,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738534270] [2020-10-26 19:31:16,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:16,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:31:16,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906997483] [2020-10-26 19:31:16,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:31:16,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:16,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:31:16,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:31:16,147 INFO L87 Difference]: Start difference. First operand 378 states and 490 transitions. Second operand 24 states. [2020-10-26 19:31:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:18,217 INFO L93 Difference]: Finished difference Result 611 states and 781 transitions. [2020-10-26 19:31:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:31:18,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-26 19:31:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:18,222 INFO L225 Difference]: With dead ends: 611 [2020-10-26 19:31:18,223 INFO L226 Difference]: Without dead ends: 607 [2020-10-26 19:31:18,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=1372, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:31:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-10-26 19:31:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 278. [2020-10-26 19:31:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-26 19:31:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 353 transitions. [2020-10-26 19:31:18,263 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 353 transitions. Word has length 65 [2020-10-26 19:31:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:18,263 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 353 transitions. [2020-10-26 19:31:18,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:31:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 353 transitions. [2020-10-26 19:31:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:31:18,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:18,265 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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 19:31:18,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:31:18,265 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash 790054841, now seen corresponding path program 1 times [2020-10-26 19:31:18,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:18,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617656459] [2020-10-26 19:31:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:18,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:18,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:18,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:23,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:31:23,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:23,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:31:23,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:23,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:31:23,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:23,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:31:23,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:23,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:23,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:23,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:23,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:23,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:23,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:23,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:23,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:23,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:23,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:23,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:31:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:23,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:23,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:23,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:23,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:23,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:23,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:23,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:23,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-26 19:31:23,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617656459] [2020-10-26 19:31:23,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:23,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:31:23,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145531429] [2020-10-26 19:31:23,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:31:23,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:23,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:31:23,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:31:23,445 INFO L87 Difference]: Start difference. First operand 278 states and 353 transitions. Second operand 14 states. [2020-10-26 19:31:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:24,019 INFO L93 Difference]: Finished difference Result 497 states and 650 transitions. [2020-10-26 19:31:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:31:24,020 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-26 19:31:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:24,023 INFO L225 Difference]: With dead ends: 497 [2020-10-26 19:31:24,023 INFO L226 Difference]: Without dead ends: 484 [2020-10-26 19:31:24,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:31:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-26 19:31:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 345. [2020-10-26 19:31:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-26 19:31:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 445 transitions. [2020-10-26 19:31:24,072 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 445 transitions. Word has length 67 [2020-10-26 19:31:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:24,072 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 445 transitions. [2020-10-26 19:31:24,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:31:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 445 transitions. [2020-10-26 19:31:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:31:24,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:24,074 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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 19:31:24,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:31:24,074 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1212756667, now seen corresponding path program 1 times [2020-10-26 19:31:24,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:24,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738251329] [2020-10-26 19:31:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:24,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:24,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:31:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:29,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:29,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:29,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:29,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:29,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:29,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:29,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:29,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:31:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:29,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:29,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:29,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:29,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:29,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:29,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 19:31:29,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738251329] [2020-10-26 19:31:29,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:29,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:31:29,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824409623] [2020-10-26 19:31:29,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:31:29,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:29,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:31:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:31:29,273 INFO L87 Difference]: Start difference. First operand 345 states and 445 transitions. Second operand 12 states. [2020-10-26 19:31:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:29,527 INFO L93 Difference]: Finished difference Result 796 states and 1054 transitions. [2020-10-26 19:31:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:31:29,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-26 19:31:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:29,530 INFO L225 Difference]: With dead ends: 796 [2020-10-26 19:31:29,530 INFO L226 Difference]: Without dead ends: 474 [2020-10-26 19:31:29,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:31:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-26 19:31:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 388. [2020-10-26 19:31:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-26 19:31:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 501 transitions. [2020-10-26 19:31:29,578 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 501 transitions. Word has length 67 [2020-10-26 19:31:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:29,579 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 501 transitions. [2020-10-26 19:31:29,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:31:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 501 transitions. [2020-10-26 19:31:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:31:29,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:29,580 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 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 19:31:29,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:31:29,581 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash 83511704, now seen corresponding path program 2 times [2020-10-26 19:31:29,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:29,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555905366] [2020-10-26 19:31:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:29,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:30,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:34,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:31:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:34,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:34,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:34,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:34,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:34,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:34,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:34,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:34,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:31:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:34,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:34,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:34,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:34,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:34,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:34,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 95 proven. 18 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-26 19:31:34,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555905366] [2020-10-26 19:31:34,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:34,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:31:34,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573600038] [2020-10-26 19:31:34,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:31:34,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:31:34,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:31:34,780 INFO L87 Difference]: Start difference. First operand 388 states and 501 transitions. Second operand 13 states. [2020-10-26 19:31:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:35,321 INFO L93 Difference]: Finished difference Result 530 states and 691 transitions. [2020-10-26 19:31:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:31:35,322 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-26 19:31:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:35,325 INFO L225 Difference]: With dead ends: 530 [2020-10-26 19:31:35,325 INFO L226 Difference]: Without dead ends: 517 [2020-10-26 19:31:35,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:31:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-10-26 19:31:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 383. [2020-10-26 19:31:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-26 19:31:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 494 transitions. [2020-10-26 19:31:35,383 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 494 transitions. Word has length 72 [2020-10-26 19:31:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:35,383 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 494 transitions. [2020-10-26 19:31:35,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:31:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 494 transitions. [2020-10-26 19:31:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:31:35,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:35,385 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:35,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:31:35,385 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:35,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2006739738, now seen corresponding path program 3 times [2020-10-26 19:31:35,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:35,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503021907] [2020-10-26 19:31:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:35,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:40,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:31:40,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:40,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:31:40,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:31:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:31:40,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:40,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:40,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:40,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:40,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:40,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:40,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:40,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:40,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:31:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:40,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:40,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:40,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:40,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:40,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-26 19:31:40,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503021907] [2020-10-26 19:31:40,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:40,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:31:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312531685] [2020-10-26 19:31:40,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:31:40,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:31:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:31:40,567 INFO L87 Difference]: Start difference. First operand 383 states and 494 transitions. Second operand 13 states. [2020-10-26 19:31:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:40,834 INFO L93 Difference]: Finished difference Result 866 states and 1144 transitions. [2020-10-26 19:31:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:31:40,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-26 19:31:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:40,840 INFO L225 Difference]: With dead ends: 866 [2020-10-26 19:31:40,841 INFO L226 Difference]: Without dead ends: 508 [2020-10-26 19:31:40,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:31:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-10-26 19:31:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 424. [2020-10-26 19:31:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-26 19:31:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 548 transitions. [2020-10-26 19:31:40,893 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 548 transitions. Word has length 72 [2020-10-26 19:31:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:40,894 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 548 transitions. [2020-10-26 19:31:40,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:31:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 548 transitions. [2020-10-26 19:31:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:31:40,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:40,896 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 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 19:31:40,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:31:40,896 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash -967129643, now seen corresponding path program 4 times [2020-10-26 19:31:40,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:40,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052617255] [2020-10-26 19:31:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:40,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:31:45,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:46,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:46,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:46,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:46,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:46,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:46,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:46,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:46,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:46,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:46,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:46,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:31:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:46,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:46,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:46,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:46,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:46,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:46,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:46,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:46,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:46,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 102 proven. 20 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 19:31:46,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052617255] [2020-10-26 19:31:46,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:46,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:31:46,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134273272] [2020-10-26 19:31:46,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:31:46,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:46,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:31:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:31:46,094 INFO L87 Difference]: Start difference. First operand 424 states and 548 transitions. Second operand 12 states. [2020-10-26 19:31:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:46,568 INFO L93 Difference]: Finished difference Result 550 states and 716 transitions. [2020-10-26 19:31:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:31:46,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-26 19:31:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:46,572 INFO L225 Difference]: With dead ends: 550 [2020-10-26 19:31:46,572 INFO L226 Difference]: Without dead ends: 537 [2020-10-26 19:31:46,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:31:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-10-26 19:31:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 413. [2020-10-26 19:31:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-26 19:31:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 533 transitions. [2020-10-26 19:31:46,623 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 533 transitions. Word has length 77 [2020-10-26 19:31:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:46,623 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 533 transitions. [2020-10-26 19:31:46,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:31:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 533 transitions. [2020-10-26 19:31:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:31:46,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:46,625 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 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 19:31:46,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:31:46,625 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:46,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1039516201, now seen corresponding path program 5 times [2020-10-26 19:31:46,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:46,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437240959] [2020-10-26 19:31:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:51,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:51,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:31:51,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:51,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:31:51,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:51,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:31:51,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:51,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:31:51,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:51,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:51,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:51,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:51,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:51,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:51,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:51,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:51,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:51,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:51,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:31:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:51,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:51,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 88 proven. 20 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-26 19:31:51,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437240959] [2020-10-26 19:31:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:31:51,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403313460] [2020-10-26 19:31:51,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:31:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:31:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:31:51,794 INFO L87 Difference]: Start difference. First operand 413 states and 533 transitions. Second operand 11 states. [2020-10-26 19:31:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:52,221 INFO L93 Difference]: Finished difference Result 523 states and 679 transitions. [2020-10-26 19:31:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:31:52,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-10-26 19:31:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:52,225 INFO L225 Difference]: With dead ends: 523 [2020-10-26 19:31:52,225 INFO L226 Difference]: Without dead ends: 510 [2020-10-26 19:31:52,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:31:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-10-26 19:31:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 399. [2020-10-26 19:31:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-26 19:31:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 514 transitions. [2020-10-26 19:31:52,278 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 514 transitions. Word has length 77 [2020-10-26 19:31:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:52,279 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 514 transitions. [2020-10-26 19:31:52,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:31:52,279 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 514 transitions. [2020-10-26 19:31:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:31:52,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:52,280 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 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 19:31:52,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:31:52,281 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1433882987, now seen corresponding path program 6 times [2020-10-26 19:31:52,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:52,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009222073] [2020-10-26 19:31:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:52,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:52,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:57,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:31:57,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:57,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:57,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:57,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:57,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:57,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:57,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:31:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:57,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-26 19:31:57,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009222073] [2020-10-26 19:31:57,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:57,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:31:57,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168874429] [2020-10-26 19:31:57,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:31:57,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:31:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:31:57,493 INFO L87 Difference]: Start difference. First operand 399 states and 514 transitions. Second operand 14 states. [2020-10-26 19:31:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:57,776 INFO L93 Difference]: Finished difference Result 886 states and 1166 transitions. [2020-10-26 19:31:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:31:57,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-10-26 19:31:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:57,780 INFO L225 Difference]: With dead ends: 886 [2020-10-26 19:31:57,780 INFO L226 Difference]: Without dead ends: 514 [2020-10-26 19:31:57,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:31:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-26 19:31:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 434. [2020-10-26 19:31:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-26 19:31:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 560 transitions. [2020-10-26 19:31:57,837 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 560 transitions. Word has length 77 [2020-10-26 19:31:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:57,837 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 560 transitions. [2020-10-26 19:31:57,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:31:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 560 transitions. [2020-10-26 19:31:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:31:57,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:57,839 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 7, 4, 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 19:31:57,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:31:57,840 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1405106946, now seen corresponding path program 7 times [2020-10-26 19:31:57,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:57,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663502723] [2020-10-26 19:31:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:57,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:57,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:02,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:02,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:32:02,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:02,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:32:02,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:32:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:02,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:32:02,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:03,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:03,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:03,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:03,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:03,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:03,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:03,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:03,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:03,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:03,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:03,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:03,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:32:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:03,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:03,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:03,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:03,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:03,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:03,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:03,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:32:03,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663502723] [2020-10-26 19:32:03,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:03,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:32:03,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953143601] [2020-10-26 19:32:03,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:32:03,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:03,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:32:03,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:32:03,052 INFO L87 Difference]: Start difference. First operand 434 states and 560 transitions. Second operand 15 states. [2020-10-26 19:32:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:03,357 INFO L93 Difference]: Finished difference Result 954 states and 1256 transitions. [2020-10-26 19:32:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:32:03,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-26 19:32:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:03,361 INFO L225 Difference]: With dead ends: 954 [2020-10-26 19:32:03,362 INFO L226 Difference]: Without dead ends: 549 [2020-10-26 19:32:03,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:32:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-26 19:32:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 469. [2020-10-26 19:32:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-26 19:32:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 606 transitions. [2020-10-26 19:32:03,418 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 606 transitions. Word has length 82 [2020-10-26 19:32:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:03,418 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 606 transitions. [2020-10-26 19:32:03,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:32:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 606 transitions. [2020-10-26 19:32:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:32:03,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:03,421 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 8, 4, 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 19:32:03,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:32:03,421 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:03,421 INFO L82 PathProgramCache]: Analyzing trace with hash 718742513, now seen corresponding path program 8 times [2020-10-26 19:32:03,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:03,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487585286] [2020-10-26 19:32:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:04,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:08,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:32:08,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:08,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:08,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:08,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:32:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:08,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:08,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:08,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:08,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:08,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:32:08,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:08,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-26 19:32:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487585286] [2020-10-26 19:32:08,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:08,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:32:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224746019] [2020-10-26 19:32:08,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:32:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:32:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:32:08,687 INFO L87 Difference]: Start difference. First operand 469 states and 606 transitions. Second operand 16 states. [2020-10-26 19:32:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:08,960 INFO L93 Difference]: Finished difference Result 1022 states and 1346 transitions. [2020-10-26 19:32:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:32:08,961 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-26 19:32:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:08,964 INFO L225 Difference]: With dead ends: 1022 [2020-10-26 19:32:08,965 INFO L226 Difference]: Without dead ends: 584 [2020-10-26 19:32:08,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:32:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-10-26 19:32:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 504. [2020-10-26 19:32:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-26 19:32:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 652 transitions. [2020-10-26 19:32:09,026 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 652 transitions. Word has length 87 [2020-10-26 19:32:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:09,026 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 652 transitions. [2020-10-26 19:32:09,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:32:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 652 transitions. [2020-10-26 19:32:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:32:09,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:09,028 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 9, 4, 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 19:32:09,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:32:09,028 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1112285278, now seen corresponding path program 9 times [2020-10-26 19:32:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:09,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333799868] [2020-10-26 19:32:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:09,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:09,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 19:32:14,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:14,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:14,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:14,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:14,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:14,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:14,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:14,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:14,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-26 19:32:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:14,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:14,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:32:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:32:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 123 proven. 1 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-10-26 19:32:14,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333799868] [2020-10-26 19:32:14,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:14,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:32:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86129190] [2020-10-26 19:32:14,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:32:14,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:32:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:32:14,200 INFO L87 Difference]: Start difference. First operand 504 states and 652 transitions. Second operand 10 states. [2020-10-26 19:32:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:14,590 INFO L93 Difference]: Finished difference Result 607 states and 785 transitions. [2020-10-26 19:32:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:32:14,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-10-26 19:32:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:14,594 INFO L225 Difference]: With dead ends: 607 [2020-10-26 19:32:14,594 INFO L226 Difference]: Without dead ends: 587 [2020-10-26 19:32:14,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:32:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-26 19:32:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 490. [2020-10-26 19:32:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-26 19:32:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 631 transitions. [2020-10-26 19:32:14,657 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 631 transitions. Word has length 92 [2020-10-26 19:32:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:14,657 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 631 transitions. [2020-10-26 19:32:14,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:32:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 631 transitions. [2020-10-26 19:32:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:32:14,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:14,660 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:14,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:32:14,660 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:14,660 INFO L82 PathProgramCache]: Analyzing trace with hash 826876768, now seen corresponding path program 10 times [2020-10-26 19:32:14,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:14,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643130243] [2020-10-26 19:32:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:14,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:19,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 19:32:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:19,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:19,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:19,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:19,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-26 19:32:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:19,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:32:19,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-26 19:32:19,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643130243] [2020-10-26 19:32:19,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:19,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:32:19,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435620230] [2020-10-26 19:32:19,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:32:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:32:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:32:19,798 INFO L87 Difference]: Start difference. First operand 490 states and 631 transitions. Second operand 9 states. [2020-10-26 19:32:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:20,142 INFO L93 Difference]: Finished difference Result 556 states and 712 transitions. [2020-10-26 19:32:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:32:20,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 92 [2020-10-26 19:32:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:20,147 INFO L225 Difference]: With dead ends: 556 [2020-10-26 19:32:20,147 INFO L226 Difference]: Without dead ends: 536 [2020-10-26 19:32:20,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:32:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-10-26 19:32:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 456. [2020-10-26 19:32:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-26 19:32:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 585 transitions. [2020-10-26 19:32:20,205 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 585 transitions. Word has length 92 [2020-10-26 19:32:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:20,205 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 585 transitions. [2020-10-26 19:32:20,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:32:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 585 transitions. [2020-10-26 19:32:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:32:20,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:20,207 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 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 19:32:20,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:32:20,207 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:20,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1024650978, now seen corresponding path program 11 times [2020-10-26 19:32:20,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:20,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460616776] [2020-10-26 19:32:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:20,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:20,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:25,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:25,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:32:25,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:25,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:32:25,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:25,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:32:25,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:25,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:32:25,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:25,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:25,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:25,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:25,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:25,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:25,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-26 19:32:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:25,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:25,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:25,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:25,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:25,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:25,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:25,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:25,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-10-26 19:32:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460616776] [2020-10-26 19:32:25,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:25,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:32:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036588937] [2020-10-26 19:32:25,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:32:25,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:32:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:32:25,487 INFO L87 Difference]: Start difference. First operand 456 states and 585 transitions. Second operand 17 states. [2020-10-26 19:32:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:25,768 INFO L93 Difference]: Finished difference Result 981 states and 1282 transitions. [2020-10-26 19:32:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:32:25,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-10-26 19:32:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:25,772 INFO L225 Difference]: With dead ends: 981 [2020-10-26 19:32:25,772 INFO L226 Difference]: Without dead ends: 558 [2020-10-26 19:32:25,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:32:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-10-26 19:32:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 485. [2020-10-26 19:32:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-26 19:32:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 623 transitions. [2020-10-26 19:32:25,832 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 623 transitions. Word has length 92 [2020-10-26 19:32:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:25,833 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 623 transitions. [2020-10-26 19:32:25,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:32:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 623 transitions. [2020-10-26 19:32:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:32:25,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:25,835 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 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 19:32:25,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:32:25,835 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:25,836 INFO L82 PathProgramCache]: Analyzing trace with hash -478899699, now seen corresponding path program 12 times [2020-10-26 19:32:25,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:25,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622177571] [2020-10-26 19:32:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:25,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:25,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:26,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:30,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:30,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:32:30,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:30,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:32:30,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:30,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:32:30,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:30,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:32:30,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:31,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:31,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:31,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:31,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:31,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:31,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:31,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:31,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:31,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:31,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:31,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:31,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:32:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:31,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:31,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-26 19:32:31,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622177571] [2020-10-26 19:32:31,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:31,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:32:31,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990931535] [2020-10-26 19:32:31,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:32:31,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:32:31,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:32:31,138 INFO L87 Difference]: Start difference. First operand 485 states and 623 transitions. Second operand 18 states. [2020-10-26 19:32:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:31,530 INFO L93 Difference]: Finished difference Result 1037 states and 1356 transitions. [2020-10-26 19:32:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:32:31,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 97 [2020-10-26 19:32:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:31,535 INFO L225 Difference]: With dead ends: 1037 [2020-10-26 19:32:31,535 INFO L226 Difference]: Without dead ends: 587 [2020-10-26 19:32:31,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:32:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-26 19:32:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 514. [2020-10-26 19:32:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-26 19:32:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 661 transitions. [2020-10-26 19:32:31,600 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 661 transitions. Word has length 97 [2020-10-26 19:32:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:31,600 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 661 transitions. [2020-10-26 19:32:31,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:32:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 661 transitions. [2020-10-26 19:32:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:32:31,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:31,603 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 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 19:32:31,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:32:31,603 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1948882554, now seen corresponding path program 13 times [2020-10-26 19:32:31,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:31,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180541568] [2020-10-26 19:32:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:31,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:32,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:36,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:36,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:32:36,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:32:36,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:32:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 19:32:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:36,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:36,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:36,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:36,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:36,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:36,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:36,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:36,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:36,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:36,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:36,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:32:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:36,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:36,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:36,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:36,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:36,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:36,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:32:36,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:36,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:32:36,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 37 proven. 102 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-10-26 19:32:36,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180541568] [2020-10-26 19:32:36,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:36,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:32:36,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030326706] [2020-10-26 19:32:36,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:32:36,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:36,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:32:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:32:36,737 INFO L87 Difference]: Start difference. First operand 514 states and 661 transitions. Second operand 8 states. [2020-10-26 19:32:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:36,982 INFO L93 Difference]: Finished difference Result 539 states and 687 transitions. [2020-10-26 19:32:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:32:36,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-10-26 19:32:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:36,985 INFO L225 Difference]: With dead ends: 539 [2020-10-26 19:32:36,986 INFO L226 Difference]: Without dead ends: 519 [2020-10-26 19:32:36,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:32:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-26 19:32:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 460. [2020-10-26 19:32:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-26 19:32:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 587 transitions. [2020-10-26 19:32:37,039 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 587 transitions. Word has length 102 [2020-10-26 19:32:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:37,040 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 587 transitions. [2020-10-26 19:32:37,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:32:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 587 transitions. [2020-10-26 19:32:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:32:37,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:37,042 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 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 19:32:37,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:32:37,042 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:37,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1072863548, now seen corresponding path program 14 times [2020-10-26 19:32:37,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:37,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786649292] [2020-10-26 19:32:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:37,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:42,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:42,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:32:42,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:42,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 19:32:42,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:32:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:32:42,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:42,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:42,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:42,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:42,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:42,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:42,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:42,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:42,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:42,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:42,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:42,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:42,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:32:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:42,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:42,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:42,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:42,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:42,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:32:42,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:42,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:42,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:42,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:42,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-26 19:32:42,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786649292] [2020-10-26 19:32:42,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:42,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:32:42,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984561950] [2020-10-26 19:32:42,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:32:42,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:42,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:32:42,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:32:42,400 INFO L87 Difference]: Start difference. First operand 460 states and 587 transitions. Second operand 19 states. [2020-10-26 19:32:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:42,781 INFO L93 Difference]: Finished difference Result 972 states and 1262 transitions. [2020-10-26 19:32:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:32:42,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2020-10-26 19:32:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:42,785 INFO L225 Difference]: With dead ends: 972 [2020-10-26 19:32:42,786 INFO L226 Difference]: Without dead ends: 549 [2020-10-26 19:32:42,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:32:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-26 19:32:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 486. [2020-10-26 19:32:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-10-26 19:32:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 621 transitions. [2020-10-26 19:32:42,844 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 621 transitions. Word has length 102 [2020-10-26 19:32:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:42,844 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 621 transitions. [2020-10-26 19:32:42,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:32:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 621 transitions. [2020-10-26 19:32:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:32:42,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:42,846 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 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 19:32:42,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:32:42,846 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1777735317, now seen corresponding path program 15 times [2020-10-26 19:32:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:42,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087816581] [2020-10-26 19:32:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:42,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:42,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:47,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:32:47,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:48,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:48,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:48,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:48,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-26 19:32:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:48,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:48,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-26 19:32:48,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087816581] [2020-10-26 19:32:48,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:48,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:32:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095617716] [2020-10-26 19:32:48,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:32:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:32:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:32:48,246 INFO L87 Difference]: Start difference. First operand 486 states and 621 transitions. Second operand 20 states. [2020-10-26 19:32:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:48,673 INFO L93 Difference]: Finished difference Result 1022 states and 1328 transitions. [2020-10-26 19:32:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:32:48,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 107 [2020-10-26 19:32:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:48,677 INFO L225 Difference]: With dead ends: 1022 [2020-10-26 19:32:48,677 INFO L226 Difference]: Without dead ends: 575 [2020-10-26 19:32:48,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:32:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-10-26 19:32:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 512. [2020-10-26 19:32:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-10-26 19:32:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 655 transitions. [2020-10-26 19:32:48,739 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 655 transitions. Word has length 107 [2020-10-26 19:32:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:48,740 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 655 transitions. [2020-10-26 19:32:48,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:32:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 655 transitions. [2020-10-26 19:32:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:32:48,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:48,742 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 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 19:32:48,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:32:48,742 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1737782552, now seen corresponding path program 16 times [2020-10-26 19:32:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:48,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202589248] [2020-10-26 19:32:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:48,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:53,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:32:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:54,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:54,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:54,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:54,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:54,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:54,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:54,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:54,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-26 19:32:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:54,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:54,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:54,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:54,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:54,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:32:54,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:54,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-10-26 19:32:54,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202589248] [2020-10-26 19:32:54,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:54,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:32:54,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581101326] [2020-10-26 19:32:54,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:32:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:32:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:32:54,152 INFO L87 Difference]: Start difference. First operand 512 states and 655 transitions. Second operand 21 states. [2020-10-26 19:32:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:54,577 INFO L93 Difference]: Finished difference Result 1072 states and 1394 transitions. [2020-10-26 19:32:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:32:54,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 112 [2020-10-26 19:32:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:54,580 INFO L225 Difference]: With dead ends: 1072 [2020-10-26 19:32:54,581 INFO L226 Difference]: Without dead ends: 601 [2020-10-26 19:32:54,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:32:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-26 19:32:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 538. [2020-10-26 19:32:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-26 19:32:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 689 transitions. [2020-10-26 19:32:54,643 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 689 transitions. Word has length 112 [2020-10-26 19:32:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:54,644 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 689 transitions. [2020-10-26 19:32:54,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:32:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 689 transitions. [2020-10-26 19:32:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:32:54,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:54,646 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 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 19:32:54,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:32:54,646 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash 144504135, now seen corresponding path program 17 times [2020-10-26 19:32:54,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:54,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381696564] [2020-10-26 19:32:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:59,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:32:59,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:00,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:00,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:00,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:00,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:33:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:00,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:00,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:00,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-10-26 19:33:00,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381696564] [2020-10-26 19:33:00,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:00,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:33:00,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788157] [2020-10-26 19:33:00,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:33:00,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:00,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:33:00,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:33:00,085 INFO L87 Difference]: Start difference. First operand 538 states and 689 transitions. Second operand 22 states. [2020-10-26 19:33:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:00,499 INFO L93 Difference]: Finished difference Result 1122 states and 1460 transitions. [2020-10-26 19:33:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:33:00,500 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 117 [2020-10-26 19:33:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:00,504 INFO L225 Difference]: With dead ends: 1122 [2020-10-26 19:33:00,504 INFO L226 Difference]: Without dead ends: 627 [2020-10-26 19:33:00,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:33:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-10-26 19:33:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 564. [2020-10-26 19:33:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-10-26 19:33:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 723 transitions. [2020-10-26 19:33:00,571 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 723 transitions. Word has length 117 [2020-10-26 19:33:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:00,572 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 723 transitions. [2020-10-26 19:33:00,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:33:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 723 transitions. [2020-10-26 19:33:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:33:00,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:00,574 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 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 19:33:00,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:33:00,574 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash 415817484, now seen corresponding path program 18 times [2020-10-26 19:33:00,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:00,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353467518] [2020-10-26 19:33:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:00,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:00,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:05,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:33:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:06,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:06,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:06,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:06,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:06,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:06,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:06,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:33:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:06,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:06,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:06,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:06,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:06,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:06,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:06,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:06,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:06,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:06,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-10-26 19:33:06,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353467518] [2020-10-26 19:33:06,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:06,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:33:06,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826262540] [2020-10-26 19:33:06,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:33:06,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:33:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:33:06,214 INFO L87 Difference]: Start difference. First operand 564 states and 723 transitions. Second operand 23 states. [2020-10-26 19:33:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:06,667 INFO L93 Difference]: Finished difference Result 1172 states and 1526 transitions. [2020-10-26 19:33:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:33:06,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 122 [2020-10-26 19:33:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:06,672 INFO L225 Difference]: With dead ends: 1172 [2020-10-26 19:33:06,672 INFO L226 Difference]: Without dead ends: 653 [2020-10-26 19:33:06,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:33:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2020-10-26 19:33:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 590. [2020-10-26 19:33:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-10-26 19:33:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 757 transitions. [2020-10-26 19:33:06,746 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 757 transitions. Word has length 122 [2020-10-26 19:33:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:06,747 INFO L481 AbstractCegarLoop]: Abstraction has 590 states and 757 transitions. [2020-10-26 19:33:06,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:33:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 757 transitions. [2020-10-26 19:33:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 19:33:06,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:06,749 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 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 19:33:06,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:33:06,750 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash 813543715, now seen corresponding path program 19 times [2020-10-26 19:33:06,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:06,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94649765] [2020-10-26 19:33:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:06,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:06,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking...