/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_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:21:26,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:21:26,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:21:26,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:21:26,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:21:26,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:21:26,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:21:26,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:21:26,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:21:26,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:21:26,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:21:26,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:21:26,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:21:26,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:21:26,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:21:26,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:21:26,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:21:26,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:21:26,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:21:26,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:21:26,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:21:26,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:21:26,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:21:26,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:21:26,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:21:26,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:21:26,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:21:26,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:21:26,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:21:26,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:21:26,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:21:26,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:21:26,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:21:26,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:21:26,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:21:26,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:21:26,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:21:26,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:21:26,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:21:26,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:21:26,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:21:26,616 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 19:21:26,658 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:21:26,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:21:26,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:21:26,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:21:26,662 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:21:26,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:21:26,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:21:26,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:21:26,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:21:26,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:21:26,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:21:26,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:21:26,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:21:26,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:21:26,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:21:26,667 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:21:26,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:21:26,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:21:26,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:21:26,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:21:26,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:21:26,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:21:26,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:21:26,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:21:26,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:21:26,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:21:26,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:21:26,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:21:26,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:21:26,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:21:27,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:21:27,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:21:27,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:21:27,110 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:21:27,111 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:21:27,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2020-10-26 19:21:27,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3d5fe6a8/f56be9c2755f45fb9faa1a10481f3f72/FLAGd48bab7d7 [2020-10-26 19:21:27,810 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:21:27,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2020-10-26 19:21:27,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3d5fe6a8/f56be9c2755f45fb9faa1a10481f3f72/FLAGd48bab7d7 [2020-10-26 19:21:28,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3d5fe6a8/f56be9c2755f45fb9faa1a10481f3f72 [2020-10-26 19:21:28,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:21:28,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:21:28,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:28,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:21:28,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:21:28,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb6c4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28, skipping insertion in model container [2020-10-26 19:21:28,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:21:28,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:21:28,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:28,402 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:21:28,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:28,443 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:21:28,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28 WrapperNode [2020-10-26 19:21:28,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:28,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:21:28,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:21:28,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:21:28,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (1/1) ... [2020-10-26 19:21:28,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:21:28,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:21:28,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:21:28,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:21:28,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (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 19:21:28,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:21:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:21:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:21:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:21:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:21:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:21:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:21:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:21:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:21:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:21:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:21:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:21:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:21:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:21:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:21:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:21:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:21:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:21:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:21:28,870 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:21:28,871 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:21:28,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:28 BoogieIcfgContainer [2020-10-26 19:21:28,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:21:28,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:21:28,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:21:28,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:21:28,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:21:28" (1/3) ... [2020-10-26 19:21:28,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ec8b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:28, skipping insertion in model container [2020-10-26 19:21:28,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:28" (2/3) ... [2020-10-26 19:21:28,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ec8b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:28, skipping insertion in model container [2020-10-26 19:21:28,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:28" (3/3) ... [2020-10-26 19:21:28,884 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2020-10-26 19:21:28,900 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:21:28,906 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:21:28,924 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:21:28,957 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:21:28,957 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:21:28,957 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:21:28,958 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:21:28,958 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:21:28,958 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:21:28,958 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:21:28,958 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:21:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-26 19:21:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:21:28,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:28,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:28,991 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash -925662558, now seen corresponding path program 1 times [2020-10-26 19:21:29,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:29,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085184104] [2020-10-26 19:21:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:29,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:29,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:21:29,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:29,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 19:21:29,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:21:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:21:29,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:21:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:29,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:29,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:29,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:29,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:21:29,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:29,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:29,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:29,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:29,727 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 19:21:29,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085184104] [2020-10-26 19:21:29,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:21:29,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:21:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664382908] [2020-10-26 19:21:29,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:21:29,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:21:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:29,753 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-26 19:21:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:29,882 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-26 19:21:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:21:29,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-26 19:21:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:29,893 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:21:29,893 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:21:29,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:21:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-26 19:21:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:21:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-26 19:21:29,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-26 19:21:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:29,948 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-26 19:21:29,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:21:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-26 19:21:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:21:29,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:29,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:29,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:21:29,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:29,951 INFO L82 PathProgramCache]: Analyzing trace with hash 504393060, now seen corresponding path program 1 times [2020-10-26 19:21:29,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:29,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210705313] [2020-10-26 19:21:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:29,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:31,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:31,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:21:31,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:21:31,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1894 [2020-10-26 19:21:31,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:31,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:21:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:21:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:31,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:31,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:31,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:31,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:31,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:31,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:21:31,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:31,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:31,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:21:31,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210705313] [2020-10-26 19:21:31,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:31,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:21:31,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663109849] [2020-10-26 19:21:31,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:21:31,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:31,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:21:31,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:31,967 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-26 19:21:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:32,077 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-26 19:21:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:21:32,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-26 19:21:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:32,079 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:21:32,079 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:21:32,080 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 19:21:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:21:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:21:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:21:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-26 19:21:32,090 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 24 [2020-10-26 19:21:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:32,090 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-26 19:21:32,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:21:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-26 19:21:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:21:32,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:32,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:32,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:21:32,092 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:32,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1961250610, now seen corresponding path program 2 times [2020-10-26 19:21:32,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:32,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704921018] [2020-10-26 19:21:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:32,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:32,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:32,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:32,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:35,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:36,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:21:36,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:21:36,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3888 [2020-10-26 19:21:36,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:36,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:21:36,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:36,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:21:36,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:36,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:36,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:36,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:36,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:36,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:21:36,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:21:36,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704921018] [2020-10-26 19:21:36,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:36,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:21:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753400704] [2020-10-26 19:21:36,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:21:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:21:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:21:36,095 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 6 states. [2020-10-26 19:21:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:36,246 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-26 19:21:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:21:36,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-26 19:21:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:36,248 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:21:36,248 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:21:36,250 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 19:21:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:21:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-26 19:21:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:21:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-26 19:21:36,266 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 29 [2020-10-26 19:21:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:36,268 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-26 19:21:36,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:21:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-26 19:21:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:21:36,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:36,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:36,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:21:36,271 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 407436188, now seen corresponding path program 3 times [2020-10-26 19:21:36,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:36,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023630027] [2020-10-26 19:21:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:41,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:41,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:21:41,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:21:41,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:21:41,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:21:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:21:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:42,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:42,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:42,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:42,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:42,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:21:42,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:42,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:42,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:42,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:42,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:21:42,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023630027] [2020-10-26 19:21:42,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:42,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:21:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025382858] [2020-10-26 19:21:42,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:21:42,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:42,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:21:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:21:42,047 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 15 states. [2020-10-26 19:21:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:42,588 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-10-26 19:21:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:21:42,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-26 19:21:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:42,590 INFO L225 Difference]: With dead ends: 51 [2020-10-26 19:21:42,590 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:21:42,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:21:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:21:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-26 19:21:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:21:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-26 19:21:42,602 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 34 [2020-10-26 19:21:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:42,603 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-26 19:21:42,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:21:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-26 19:21:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:21:42,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:42,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:42,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:21:42,605 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1255437194, now seen corresponding path program 1 times [2020-10-26 19:21:42,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:42,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648255982] [2020-10-26 19:21:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:42,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:42,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:42,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:47,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:21:47,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:47,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4636 [2020-10-26 19:21:47,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:47,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:21:47,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:47,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:21:47,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:47,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:47,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:47,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:47,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:47,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:47,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:47,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:21:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:47,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:21:47,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:47,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:21:47,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:21:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:47,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 19:21:47,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648255982] [2020-10-26 19:21:47,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:47,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:21:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939937004] [2020-10-26 19:21:47,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:21:47,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:47,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:21:47,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:21:47,341 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2020-10-26 19:21:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:47,467 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-10-26 19:21:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:21:47,467 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 19:21:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:47,470 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:21:47,471 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:21:47,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 19:21:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:21:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:21:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:21:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-26 19:21:47,482 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 42 [2020-10-26 19:21:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:47,483 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-26 19:21:47,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:21:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-26 19:21:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:21:47,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:47,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:47,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:21:47,485 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash 287271008, now seen corresponding path program 2 times [2020-10-26 19:21:47,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:47,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640222314] [2020-10-26 19:21:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:52,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:21:52,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:52,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:21:52,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:21:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:21:52,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:21:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:52,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:52,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:52,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:52,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:52,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:52,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:52,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:52,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:52,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:21:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:52,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:21:52,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:52,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:21:52,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:21:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-26 19:21:52,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640222314] [2020-10-26 19:21:52,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:52,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:21:52,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375709485] [2020-10-26 19:21:52,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:21:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:21:52,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:21:52,598 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 8 states. [2020-10-26 19:21:52,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:52,754 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-26 19:21:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:21:52,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-26 19:21:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:52,756 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:21:52,756 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:21:52,757 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 19:21:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:21:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-26 19:21:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:21:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-26 19:21:52,782 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2020-10-26 19:21:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:52,783 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-26 19:21:52,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:21:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-26 19:21:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:21:52,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:52,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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 19:21:52,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:21:52,787 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash -136299858, now seen corresponding path program 3 times [2020-10-26 19:21:52,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:52,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132540748] [2020-10-26 19:21:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:52,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:57,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:21:57,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:21:57,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:21:57,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:57,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:21:57,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:57,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:21:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:57,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:57,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:57,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:57,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:57,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:57,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:57,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:57,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:57,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:57,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:21:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:57,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:57,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:57,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:21:57,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:21:57,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:21:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:57,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-26 19:21:57,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132540748] [2020-10-26 19:21:57,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:57,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:21:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666587840] [2020-10-26 19:21:57,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:21:57,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:57,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:21:57,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:21:57,952 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 9 states. [2020-10-26 19:21:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:58,158 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-10-26 19:21:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:21:58,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-26 19:21:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:58,160 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:21:58,161 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:21:58,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 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 19:21:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:21:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-10-26 19:21:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:21:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-26 19:21:58,174 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 52 [2020-10-26 19:21:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:58,174 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-26 19:21:58,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:21:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-26 19:21:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:21:58,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:58,176 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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 19:21:58,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:21:58,176 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:58,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1213490920, now seen corresponding path program 4 times [2020-10-26 19:21:58,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:58,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081513599] [2020-10-26 19:21:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:58,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:03,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:22:03,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:03,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:22:03,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:22:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:03,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:22:03,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:03,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:03,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:03,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:03,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:03,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:03,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:03,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:03,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:03,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:03,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:22:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:03,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:03,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:03,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:03,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:03,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:03,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:03,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:03,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-26 19:22:03,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081513599] [2020-10-26 19:22:03,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:03,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:22:03,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153592209] [2020-10-26 19:22:03,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:22:03,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:03,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:22:03,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:22:03,345 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 10 states. [2020-10-26 19:22:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:03,600 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-26 19:22:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:22:03,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-26 19:22:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:03,602 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:22:03,602 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:22:03,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:22:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:22:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-26 19:22:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:22:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-26 19:22:03,625 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 57 [2020-10-26 19:22:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:03,625 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-26 19:22:03,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:22:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-26 19:22:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:22:03,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:03,629 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, 1, 1] [2020-10-26 19:22:03,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:22:03,629 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2060108006, now seen corresponding path program 5 times [2020-10-26 19:22:03,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:03,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130349811] [2020-10-26 19:22:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:03,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:03,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:08,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:22:08,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:08,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:22:08,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:08,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:22:08,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:08,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:22:08,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:08,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:08,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:08,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:08,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:08,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:08,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:08,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:08,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:08,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:08,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:08,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:22:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:08,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:08,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:08,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:08,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:08,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:08,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:08,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:08,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:08,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 19:22:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130349811] [2020-10-26 19:22:08,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:08,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:22:08,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126087512] [2020-10-26 19:22:08,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:22:08,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:22:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:22:08,818 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 11 states. [2020-10-26 19:22:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:09,027 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-10-26 19:22:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:22:09,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-26 19:22:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:09,029 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:22:09,029 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:22:09,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:22:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:22:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:22:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:22:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-26 19:22:09,064 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 62 [2020-10-26 19:22:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:09,065 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-26 19:22:09,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:22:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-26 19:22:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:22:09,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:09,066 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, 1, 1] [2020-10-26 19:22:09,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:22:09,066 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1885700560, now seen corresponding path program 6 times [2020-10-26 19:22:09,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:09,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055416704] [2020-10-26 19:22:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:09,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:09,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:09,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:14,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:22:14,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:14,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:22:14,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:22:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:22:14,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:14,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:14,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:14,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:14,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:22:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:14,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:14,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:14,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-26 19:22:14,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055416704] [2020-10-26 19:22:14,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:14,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:22:14,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142870810] [2020-10-26 19:22:14,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:22:14,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:14,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:22:14,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:14,266 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 12 states. [2020-10-26 19:22:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:14,519 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-26 19:22:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:22:14,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-26 19:22:14,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:14,522 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:22:14,522 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:22:14,523 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 19:22:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:22:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-26 19:22:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:22:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-26 19:22:14,535 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 67 [2020-10-26 19:22:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:14,536 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-26 19:22:14,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:22:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-26 19:22:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:22:14,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:14,537 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 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 19:22:14,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:22:14,538 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 590290718, now seen corresponding path program 7 times [2020-10-26 19:22:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:14,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411088299] [2020-10-26 19:22:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:14,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:19,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:22:19,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:22:19,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:22:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:22:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:19,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:19,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:19,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:19,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:19,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:19,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:19,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:22:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:19,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:19,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:19,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:19,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:19,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:19,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:19,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:19,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-26 19:22:19,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411088299] [2020-10-26 19:22:19,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:19,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:22:19,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874822888] [2020-10-26 19:22:19,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:22:19,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:19,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:22:19,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:19,746 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 13 states. [2020-10-26 19:22:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:19,967 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2020-10-26 19:22:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:22:19,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-26 19:22:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:19,969 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:22:19,970 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:22:19,970 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 19:22:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:22:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-26 19:22:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:22:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-26 19:22:19,987 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 72 [2020-10-26 19:22:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:19,988 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-26 19:22:19,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:22:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-26 19:22:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:22:19,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:19,989 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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 19:22:19,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:22:19,990 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:19,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1757863288, now seen corresponding path program 8 times [2020-10-26 19:22:19,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:19,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741265187] [2020-10-26 19:22:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:20,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:20,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:20,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:22:25,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:25,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:25,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:25,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:25,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:25,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:22:25,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:25,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:25,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:22:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:25,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:25,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:25,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:25,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:25,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:25,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:25,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:25,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:25,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-10-26 19:22:25,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741265187] [2020-10-26 19:22:25,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:25,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:22:25,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780895792] [2020-10-26 19:22:25,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:22:25,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:25,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:22:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:22:25,246 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 14 states. [2020-10-26 19:22:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:25,532 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-10-26 19:22:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:22:25,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-10-26 19:22:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:25,534 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:22:25,534 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:22:25,535 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 19:22:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:22:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-26 19:22:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:22:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-26 19:22:25,546 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-10-26 19:22:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:25,546 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-26 19:22:25,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:22:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-26 19:22:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:22:25,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:25,550 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 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 19:22:25,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:22:25,550 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:25,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:25,551 INFO L82 PathProgramCache]: Analyzing trace with hash -682535594, now seen corresponding path program 9 times [2020-10-26 19:22:25,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:25,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024483733] [2020-10-26 19:22:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:22:30,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:30,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:30,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:30,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:30,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:30,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:30,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-26 19:22:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:30,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:30,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:30,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-10-26 19:22:30,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024483733] [2020-10-26 19:22:30,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:30,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:22:30,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331573069] [2020-10-26 19:22:30,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:22:30,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:22:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:22:30,817 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 15 states. [2020-10-26 19:22:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:31,075 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2020-10-26 19:22:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:22:31,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-26 19:22:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:31,077 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:22:31,077 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:22:31,078 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 19:22:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:22:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:22:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:22:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-26 19:22:31,098 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 82 [2020-10-26 19:22:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:31,099 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-26 19:22:31,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:22:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-26 19:22:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:22:31,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:31,101 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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 19:22:31,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:22:31,101 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1460828992, now seen corresponding path program 10 times [2020-10-26 19:22:31,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:31,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645753181] [2020-10-26 19:22:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:31,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:36,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:22:36,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:36,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:22:36,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:22:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:36,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:22:36,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:36,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:36,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:36,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:36,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:36,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:36,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:36,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:36,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:36,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:22:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:36,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-26 19:22:36,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645753181] [2020-10-26 19:22:36,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:36,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:22:36,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265998138] [2020-10-26 19:22:36,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:22:36,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:36,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:22:36,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:22:36,374 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 16 states. [2020-10-26 19:22:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:36,659 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2020-10-26 19:22:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:22:36,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-26 19:22:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:36,661 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:22:36,662 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:22:36,664 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 19:22:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:22:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-26 19:22:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:22:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-26 19:22:36,677 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 87 [2020-10-26 19:22:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:36,678 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-26 19:22:36,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:22:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-26 19:22:36,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:22:36,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:36,681 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 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 19:22:36,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:22:36,681 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:36,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1047880590, now seen corresponding path program 11 times [2020-10-26 19:22:36,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:36,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979914154] [2020-10-26 19:22:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:36,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:41,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:22:41,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:41,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 19:22:41,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:22:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:22:41,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:41,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:41,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:41,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:41,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:42,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:22:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:42,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:42,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:42,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:42,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:42,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:22:42,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:42,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2020-10-26 19:22:42,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979914154] [2020-10-26 19:22:42,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:42,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:22:42,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045947959] [2020-10-26 19:22:42,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:22:42,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:22:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:22:42,011 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 17 states. [2020-10-26 19:22:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:42,352 INFO L93 Difference]: Finished difference Result 177 states and 185 transitions. [2020-10-26 19:22:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:22:42,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-10-26 19:22:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:42,353 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:22:42,353 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:22:42,354 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 19:22:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:22:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-26 19:22:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:22:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-26 19:22:42,369 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-10-26 19:22:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:42,369 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-26 19:22:42,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:22:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-26 19:22:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:22:42,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:42,371 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 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 19:22:42,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:22:42,371 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash -371356680, now seen corresponding path program 12 times [2020-10-26 19:22:42,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:42,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476757812] [2020-10-26 19:22:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:42,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:42,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:42,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:22:47,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:47,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:47,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:47,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:47,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:47,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:47,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:47,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:22:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:47,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:47,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2020-10-26 19:22:47,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476757812] [2020-10-26 19:22:47,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:47,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:22:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399799916] [2020-10-26 19:22:47,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:22:47,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:22:47,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:22:47,694 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 18 states. [2020-10-26 19:22:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:48,001 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2020-10-26 19:22:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:22:48,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 97 [2020-10-26 19:22:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:48,004 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:22:48,004 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:22:48,005 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 19:22:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:22:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-26 19:22:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:22:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-26 19:22:48,016 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 97 [2020-10-26 19:22:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:48,016 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-26 19:22:48,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:22:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-26 19:22:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:22:48,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:48,017 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 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 19:22:48,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:22:48,018 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:48,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2132850234, now seen corresponding path program 13 times [2020-10-26 19:22:48,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:48,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983481494] [2020-10-26 19:22:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:48,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:53,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:22:53,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:53,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 19:22:53,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:53,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:22:53,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:53,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:22:53,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:53,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:53,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:53,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:53,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:53,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:53,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:53,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:53,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:53,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:53,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-26 19:22:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:53,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2020-10-26 19:22:53,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983481494] [2020-10-26 19:22:53,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:53,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:22:53,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670650986] [2020-10-26 19:22:53,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:22:53,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:22:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:22:53,393 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 19 states. [2020-10-26 19:22:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:53,747 INFO L93 Difference]: Finished difference Result 195 states and 203 transitions. [2020-10-26 19:22:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:22:53,747 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2020-10-26 19:22:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:53,748 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:22:53,748 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:22:53,750 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 19:22:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:22:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:22:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:22:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2020-10-26 19:22:53,763 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 102 [2020-10-26 19:22:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:53,763 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2020-10-26 19:22:53,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:22:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2020-10-26 19:22:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:22:53,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:53,764 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 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 19:22:53,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:22:53,765 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash -662285136, now seen corresponding path program 14 times [2020-10-26 19:22:53,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:53,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804598276] [2020-10-26 19:22:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:53,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:58,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:22:58,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:22:58,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:22:58,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:22:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:22:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:59,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:59,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:59,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:59,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:59,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:59,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:59,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:59,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:59,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:59,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:59,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 19:22:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:59,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:22:59,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:59,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:22:59,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:22:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:59,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 136 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2020-10-26 19:22:59,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804598276] [2020-10-26 19:22:59,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:59,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:22:59,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551887635] [2020-10-26 19:22:59,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:22:59,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:22:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:22:59,102 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 20 states. [2020-10-26 19:22:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:59,391 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2020-10-26 19:22:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:22:59,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 107 [2020-10-26 19:22:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:59,393 INFO L225 Difference]: With dead ends: 204 [2020-10-26 19:22:59,393 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:22:59,394 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 19:22:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:22:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-10-26 19:22:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:22:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-26 19:22:59,422 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 107 [2020-10-26 19:22:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:59,422 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-26 19:22:59,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:22:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-26 19:22:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:22:59,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:59,423 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 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 19:22:59,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:22:59,424 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash 131270654, now seen corresponding path program 15 times [2020-10-26 19:22:59,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:59,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984339120] [2020-10-26 19:22:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:59,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:04,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:23:04,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:23:04,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:23:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:23:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:04,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:04,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:04,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:04,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:04,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:04,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:04,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:04,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:04,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:04,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:04,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:23:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:04,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:04,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:04,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:04,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:04,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:04,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2020-10-26 19:23:04,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984339120] [2020-10-26 19:23:04,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:04,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:23:04,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151821912] [2020-10-26 19:23:04,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:23:04,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:23:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:23:04,844 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 21 states. [2020-10-26 19:23:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:05,208 INFO L93 Difference]: Finished difference Result 213 states and 221 transitions. [2020-10-26 19:23:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:23:05,209 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 112 [2020-10-26 19:23:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:05,210 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:23:05,210 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:23:05,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:23:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:23:05,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-10-26 19:23:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:23:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-26 19:23:05,222 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 112 [2020-10-26 19:23:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:05,222 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-26 19:23:05,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:23:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-26 19:23:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:23:05,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:05,224 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 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 19:23:05,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:23:05,224 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 989386088, now seen corresponding path program 16 times [2020-10-26 19:23:05,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:05,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705309297] [2020-10-26 19:23:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:05,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:05,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:07,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:23:10,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:10,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:10,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 19:23:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:10,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:10,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:10,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:10,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:10,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:23:10,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:10,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:10,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:10,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:10,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 2 proven. 171 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-26 19:23:10,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705309297] [2020-10-26 19:23:10,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:10,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:23:10,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514410455] [2020-10-26 19:23:10,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:23:10,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:10,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:23:10,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:23:10,855 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 22 states. [2020-10-26 19:23:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:11,241 INFO L93 Difference]: Finished difference Result 222 states and 230 transitions. [2020-10-26 19:23:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:23:11,241 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 117 [2020-10-26 19:23:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:11,243 INFO L225 Difference]: With dead ends: 222 [2020-10-26 19:23:11,243 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:23:11,244 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 19:23:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:23:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-26 19:23:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:23:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-10-26 19:23:11,255 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 117 [2020-10-26 19:23:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:11,256 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-10-26 19:23:11,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:23:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-10-26 19:23:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:23:11,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:11,257 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 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 19:23:11,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:23:11,258 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1033150006, now seen corresponding path program 17 times [2020-10-26 19:23:11,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:11,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443409691] [2020-10-26 19:23:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:23:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:16,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:16,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:16,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 19:23:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:16,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:16,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:16,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:16,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:16,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:16,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:16,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:16,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-10-26 19:23:16,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443409691] [2020-10-26 19:23:16,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:16,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:23:16,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049569253] [2020-10-26 19:23:16,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:23:16,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:23:16,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:23:16,785 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 23 states. [2020-10-26 19:23:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:17,144 INFO L93 Difference]: Finished difference Result 231 states and 239 transitions. [2020-10-26 19:23:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:23:17,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 122 [2020-10-26 19:23:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:17,147 INFO L225 Difference]: With dead ends: 231 [2020-10-26 19:23:17,147 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:23:17,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:23:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:23:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:23:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:23:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-10-26 19:23:17,158 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 122 [2020-10-26 19:23:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:17,159 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-10-26 19:23:17,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:23:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-10-26 19:23:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 19:23:17,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:17,160 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 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 19:23:17,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:23:17,160 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:17,160 INFO L82 PathProgramCache]: Analyzing trace with hash -132051424, now seen corresponding path program 18 times [2020-10-26 19:23:17,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:17,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774590999] [2020-10-26 19:23:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:17,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:20,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:23:22,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:22,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:22,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:22,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:22,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:22,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:22,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:23:22,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:22,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:22,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:22,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:23:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:22,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:22,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:22,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:22,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2020-10-26 19:23:22,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774590999] [2020-10-26 19:23:22,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:22,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:23:22,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494424592] [2020-10-26 19:23:22,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:23:22,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:22,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:23:22,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:23:22,690 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 24 states. [2020-10-26 19:23:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:23,132 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-10-26 19:23:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:23:23,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-10-26 19:23:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:23,136 INFO L225 Difference]: With dead ends: 240 [2020-10-26 19:23:23,138 INFO L226 Difference]: Without dead ends: 137 [2020-10-26 19:23:23,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:23:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-26 19:23:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2020-10-26 19:23:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-26 19:23:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2020-10-26 19:23:23,155 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 127 [2020-10-26 19:23:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:23,155 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2020-10-26 19:23:23,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:23:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2020-10-26 19:23:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:23:23,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:23,158 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 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 19:23:23,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:23:23,158 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1298664558, now seen corresponding path program 19 times [2020-10-26 19:23:23,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:23,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796415491] [2020-10-26 19:23:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:23,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:23,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:26,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:28,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:28,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:23:28,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:28,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-26 19:23:28,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:23:28,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:28,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:23:28,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:28,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:28,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:28,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:28,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:28,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:23:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:28,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:28,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:28,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:28,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:28,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:28,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:28,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:28,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 2 proven. 231 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2020-10-26 19:23:28,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796415491] [2020-10-26 19:23:28,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:28,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:23:28,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323979297] [2020-10-26 19:23:28,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:23:28,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:28,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:23:28,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:23:28,900 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand 25 states. [2020-10-26 19:23:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:29,357 INFO L93 Difference]: Finished difference Result 249 states and 257 transitions. [2020-10-26 19:23:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:23:29,357 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 132 [2020-10-26 19:23:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:29,359 INFO L225 Difference]: With dead ends: 249 [2020-10-26 19:23:29,359 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:23:29,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:23:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:23:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-10-26 19:23:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-26 19:23:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2020-10-26 19:23:29,373 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 132 [2020-10-26 19:23:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:29,376 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2020-10-26 19:23:29,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:23:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2020-10-26 19:23:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:23:29,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:29,378 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 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 19:23:29,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:23:29,378 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash 99286744, now seen corresponding path program 20 times [2020-10-26 19:23:29,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:29,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239876560] [2020-10-26 19:23:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:29,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:34,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:34,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:34,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 19:23:34,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-26 19:23:34,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:23:34,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:34,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:23:34,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:35,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:35,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:35,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:35,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:35,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:35,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:35,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:35,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:35,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-26 19:23:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:35,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:35,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:35,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:35,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:35,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:35,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:35,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:35,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:35,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2020-10-26 19:23:35,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239876560] [2020-10-26 19:23:35,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:35,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:23:35,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374987042] [2020-10-26 19:23:35,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:23:35,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:23:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:23:35,065 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand 26 states. [2020-10-26 19:23:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:35,549 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2020-10-26 19:23:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:23:35,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 137 [2020-10-26 19:23:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:35,551 INFO L225 Difference]: With dead ends: 258 [2020-10-26 19:23:35,551 INFO L226 Difference]: Without dead ends: 147 [2020-10-26 19:23:35,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:23:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-26 19:23:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-26 19:23:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-26 19:23:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2020-10-26 19:23:35,564 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 137 [2020-10-26 19:23:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:35,565 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2020-10-26 19:23:35,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:23:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2020-10-26 19:23:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 19:23:35,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:35,566 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 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 19:23:35,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:23:35,566 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:35,567 INFO L82 PathProgramCache]: Analyzing trace with hash -477015386, now seen corresponding path program 21 times [2020-10-26 19:23:35,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:35,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855700069] [2020-10-26 19:23:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:35,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:35,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:40,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:23:40,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:41,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:41,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:41,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-26 19:23:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:41,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:41,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:41,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:41,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:23:41,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 2 proven. 276 refuted. 0 times theorem prover too weak. 1060 trivial. 0 not checked. [2020-10-26 19:23:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855700069] [2020-10-26 19:23:41,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:41,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:23:41,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142586593] [2020-10-26 19:23:41,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:23:41,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:23:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:23:41,188 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand 27 states. [2020-10-26 19:23:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:41,606 INFO L93 Difference]: Finished difference Result 267 states and 275 transitions. [2020-10-26 19:23:41,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:23:41,606 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 142 [2020-10-26 19:23:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:41,608 INFO L225 Difference]: With dead ends: 267 [2020-10-26 19:23:41,608 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:23:41,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:23:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:23:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-26 19:23:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:23:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2020-10-26 19:23:41,622 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 142 [2020-10-26 19:23:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:41,623 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2020-10-26 19:23:41,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:23:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2020-10-26 19:23:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 19:23:41,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:41,625 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 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 19:23:41,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:23:41,626 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1455249520, now seen corresponding path program 22 times [2020-10-26 19:23:41,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:41,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440383899] [2020-10-26 19:23:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:46,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:23:46,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:47,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:47,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:47,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:47,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:47,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:47,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:47,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:47,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:47,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:47,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:47,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:47,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-26 19:23:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:47,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:47,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:47,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:47,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:47,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:47,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:47,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:47,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:47,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:47,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 2 proven. 300 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2020-10-26 19:23:47,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440383899] [2020-10-26 19:23:47,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:47,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:23:47,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863775100] [2020-10-26 19:23:47,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:23:47,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:23:47,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:23:47,282 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand 28 states. [2020-10-26 19:23:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:47,790 INFO L93 Difference]: Finished difference Result 276 states and 284 transitions. [2020-10-26 19:23:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:23:47,790 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2020-10-26 19:23:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:47,792 INFO L225 Difference]: With dead ends: 276 [2020-10-26 19:23:47,792 INFO L226 Difference]: Without dead ends: 157 [2020-10-26 19:23:47,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:23:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-26 19:23:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2020-10-26 19:23:47,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-26 19:23:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2020-10-26 19:23:47,806 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 147 [2020-10-26 19:23:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:47,806 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2020-10-26 19:23:47,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:23:47,806 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2020-10-26 19:23:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-26 19:23:47,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:47,808 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 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 19:23:47,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:23:47,808 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash -313233186, now seen corresponding path program 23 times [2020-10-26 19:23:47,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:47,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536759762] [2020-10-26 19:23:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:47,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:52,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:23:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:53,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:53,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:53,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:53,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:53,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:53,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:53,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:53,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:53,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:53,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:53,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:53,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-10-26 19:23:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:53,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:53,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:53,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:23:53,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:53,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:53,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:53,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:53,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:23:53,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:53,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 2 proven. 325 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2020-10-26 19:23:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536759762] [2020-10-26 19:23:53,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:53,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:23:53,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744800650] [2020-10-26 19:23:53,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:23:53,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:23:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:23:53,518 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand 29 states. [2020-10-26 19:23:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:54,058 INFO L93 Difference]: Finished difference Result 285 states and 293 transitions. [2020-10-26 19:23:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:23:54,059 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 152 [2020-10-26 19:23:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:54,060 INFO L225 Difference]: With dead ends: 285 [2020-10-26 19:23:54,061 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:23:54,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:23:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:23:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-10-26 19:23:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-26 19:23:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2020-10-26 19:23:54,075 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 152 [2020-10-26 19:23:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:54,075 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2020-10-26 19:23:54,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:23:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2020-10-26 19:23:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:23:54,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:54,077 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 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 19:23:54,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:23:54,077 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1240201144, now seen corresponding path program 24 times [2020-10-26 19:23:54,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:54,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122151357] [2020-10-26 19:23:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:59,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:59,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 19:23:59,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:23:59,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5278 [2020-10-26 19:23:59,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:59,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:23:59,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:59,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:23:59,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:00,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:00,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:00,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:00,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:00,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:00,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:00,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:00,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:00,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:24:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:00,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:00,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 2 proven. 351 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2020-10-26 19:24:00,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122151357] [2020-10-26 19:24:00,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:00,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:24:00,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197487019] [2020-10-26 19:24:00,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:24:00,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:00,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:24:00,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:24:00,029 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand 30 states. [2020-10-26 19:24:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:00,519 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2020-10-26 19:24:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:24:00,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2020-10-26 19:24:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:00,522 INFO L225 Difference]: With dead ends: 294 [2020-10-26 19:24:00,522 INFO L226 Difference]: Without dead ends: 167 [2020-10-26 19:24:00,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:24:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-26 19:24:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-26 19:24:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-26 19:24:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2020-10-26 19:24:00,533 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 157 [2020-10-26 19:24:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:00,533 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2020-10-26 19:24:00,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:24:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2020-10-26 19:24:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:24:00,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:00,534 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 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 19:24:00,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:24:00,535 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1492477718, now seen corresponding path program 25 times [2020-10-26 19:24:00,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:00,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086491668] [2020-10-26 19:24:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:00,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:00,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:00,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:24:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:06,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:06,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:06,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:06,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:06,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:06,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:06,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:06,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:06,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:06,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:06,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:06,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-10-26 19:24:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:06,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:06,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:06,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:06,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:06,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 2 proven. 378 refuted. 0 times theorem prover too weak. 1460 trivial. 0 not checked. [2020-10-26 19:24:06,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086491668] [2020-10-26 19:24:06,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:06,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:24:06,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159262264] [2020-10-26 19:24:06,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:24:06,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:06,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:24:06,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:24:06,309 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand 31 states. [2020-10-26 19:24:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:06,893 INFO L93 Difference]: Finished difference Result 303 states and 311 transitions. [2020-10-26 19:24:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:24:06,894 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2020-10-26 19:24:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:06,896 INFO L225 Difference]: With dead ends: 303 [2020-10-26 19:24:06,896 INFO L226 Difference]: Without dead ends: 172 [2020-10-26 19:24:06,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:24:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-26 19:24:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2020-10-26 19:24:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:24:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2020-10-26 19:24:06,913 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 162 [2020-10-26 19:24:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:06,913 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2020-10-26 19:24:06,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:24:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2020-10-26 19:24:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 19:24:06,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:06,915 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 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 19:24:06,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:24:06,915 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash -817159936, now seen corresponding path program 26 times [2020-10-26 19:24:06,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:06,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61443498] [2020-10-26 19:24:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:06,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:07,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:07,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:11,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:24:11,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:12,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:12,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:12,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:12,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:12,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:12,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:12,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:12,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:12,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:12,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 19:24:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:12,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:12,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:12,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:12,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:12,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:12,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:12,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 1570 trivial. 0 not checked. [2020-10-26 19:24:12,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61443498] [2020-10-26 19:24:12,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:12,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:24:12,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260901594] [2020-10-26 19:24:12,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:24:12,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:12,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:24:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:24:12,711 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand 32 states. [2020-10-26 19:24:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:13,139 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2020-10-26 19:24:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:24:13,140 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 167 [2020-10-26 19:24:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:13,142 INFO L225 Difference]: With dead ends: 312 [2020-10-26 19:24:13,142 INFO L226 Difference]: Without dead ends: 177 [2020-10-26 19:24:13,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:24:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-26 19:24:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2020-10-26 19:24:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-26 19:24:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2020-10-26 19:24:13,157 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 167 [2020-10-26 19:24:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:13,157 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2020-10-26 19:24:13,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:24:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2020-10-26 19:24:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 19:24:13,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:13,159 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 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 19:24:13,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:24:13,159 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:13,159 INFO L82 PathProgramCache]: Analyzing trace with hash -709348018, now seen corresponding path program 27 times [2020-10-26 19:24:13,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:13,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466264933] [2020-10-26 19:24:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:13,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:13,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:13,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:18,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:18,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:24:18,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:24:18,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:24:18,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:24:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:18,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:24:18,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:18,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:18,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:18,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:18,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:18,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:18,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:18,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:18,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:18,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-10-26 19:24:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:18,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:18,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:18,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:18,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:18,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:18,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:18,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 435 refuted. 0 times theorem prover too weak. 1684 trivial. 0 not checked. [2020-10-26 19:24:18,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466264933] [2020-10-26 19:24:18,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:18,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:24:18,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469600531] [2020-10-26 19:24:18,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:24:18,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:24:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:18,915 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand 33 states. [2020-10-26 19:24:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:19,507 INFO L93 Difference]: Finished difference Result 321 states and 329 transitions. [2020-10-26 19:24:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:24:19,508 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 172 [2020-10-26 19:24:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:19,510 INFO L225 Difference]: With dead ends: 321 [2020-10-26 19:24:19,510 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:24:19,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:24:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2020-10-26 19:24:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-26 19:24:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2020-10-26 19:24:19,525 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 172 [2020-10-26 19:24:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:19,526 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2020-10-26 19:24:19,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:24:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2020-10-26 19:24:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 19:24:19,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:19,527 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 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 19:24:19,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:24:19,528 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1496059464, now seen corresponding path program 28 times [2020-10-26 19:24:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750752473] [2020-10-26 19:24:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:19,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:19,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7127 [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:24:26,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:27,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:27,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:27,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:27,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:27,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:27,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:27,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:27,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:27,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:27,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:27,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:27,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-26 19:24:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:27,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:27,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:27,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:27,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:24:27,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:27,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:27,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:27,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:27,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 1802 trivial. 0 not checked. [2020-10-26 19:24:27,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750752473] [2020-10-26 19:24:27,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:27,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:24:27,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601527531] [2020-10-26 19:24:27,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:24:27,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:24:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:24:27,490 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand 34 states. [2020-10-26 19:24:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:28,070 INFO L93 Difference]: Finished difference Result 330 states and 338 transitions. [2020-10-26 19:24:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:24:28,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 177 [2020-10-26 19:24:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:28,072 INFO L225 Difference]: With dead ends: 330 [2020-10-26 19:24:28,072 INFO L226 Difference]: Without dead ends: 187 [2020-10-26 19:24:28,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:24:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-26 19:24:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-26 19:24:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-26 19:24:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2020-10-26 19:24:28,087 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 177 [2020-10-26 19:24:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:28,088 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2020-10-26 19:24:28,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:24:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2020-10-26 19:24:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 19:24:28,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:28,089 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 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 19:24:28,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:24:28,089 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1813980282, now seen corresponding path program 29 times [2020-10-26 19:24:28,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:28,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136147859] [2020-10-26 19:24:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:28,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:28,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:24:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:33,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:33,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:33,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:33,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:33,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:33,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:33,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:33,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-10-26 19:24:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:33,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:33,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2422 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2020-10-26 19:24:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136147859] [2020-10-26 19:24:34,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:34,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:24:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234024958] [2020-10-26 19:24:34,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:24:34,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:34,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:24:34,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:24:34,008 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand 35 states. [2020-10-26 19:24:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:34,625 INFO L93 Difference]: Finished difference Result 339 states and 347 transitions. [2020-10-26 19:24:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:24:34,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 182 [2020-10-26 19:24:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:34,627 INFO L225 Difference]: With dead ends: 339 [2020-10-26 19:24:34,627 INFO L226 Difference]: Without dead ends: 192 [2020-10-26 19:24:34,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:24:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-26 19:24:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-10-26 19:24:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-26 19:24:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 193 transitions. [2020-10-26 19:24:34,645 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 193 transitions. Word has length 182 [2020-10-26 19:24:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:34,645 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 193 transitions. [2020-10-26 19:24:34,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:24:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 193 transitions. [2020-10-26 19:24:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 19:24:34,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:34,646 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 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 19:24:34,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:24:34,647 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:34,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1033534064, now seen corresponding path program 30 times [2020-10-26 19:24:34,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:34,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167946502] [2020-10-26 19:24:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:34,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:34,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:39,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:39,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 19:24:39,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5256 [2020-10-26 19:24:39,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:24:39,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:24:39,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:40,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:40,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:40,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:40,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:24:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:40,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:40,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:40,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:40,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:40,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:24:40,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:40,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:40,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:40,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:40,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 2 proven. 528 refuted. 0 times theorem prover too weak. 2050 trivial. 0 not checked. [2020-10-26 19:24:40,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167946502] [2020-10-26 19:24:40,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:40,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:24:40,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812945588] [2020-10-26 19:24:40,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:24:40,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:24:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:24:40,893 INFO L87 Difference]: Start difference. First operand 190 states and 193 transitions. Second operand 36 states. [2020-10-26 19:24:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:41,593 INFO L93 Difference]: Finished difference Result 348 states and 356 transitions. [2020-10-26 19:24:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:24:41,594 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 187 [2020-10-26 19:24:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:41,595 INFO L225 Difference]: With dead ends: 348 [2020-10-26 19:24:41,595 INFO L226 Difference]: Without dead ends: 197 [2020-10-26 19:24:41,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:24:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-26 19:24:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2020-10-26 19:24:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-26 19:24:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2020-10-26 19:24:41,611 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 187 [2020-10-26 19:24:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:41,611 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2020-10-26 19:24:41,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:24:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2020-10-26 19:24:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-26 19:24:41,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:41,613 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 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 19:24:41,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:24:41,613 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:41,614 INFO L82 PathProgramCache]: Analyzing trace with hash 78862782, now seen corresponding path program 31 times [2020-10-26 19:24:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:41,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336602258] [2020-10-26 19:24:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:41,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:46,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:46,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-26 19:24:46,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:46,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-26 19:24:46,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:24:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:46,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:24:46,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:47,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:47,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:47,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:47,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:47,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:47,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:47,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:47,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-26 19:24:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:47,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:47,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:47,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:47,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:47,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:47,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:47,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2743 backedges. 2 proven. 561 refuted. 0 times theorem prover too weak. 2180 trivial. 0 not checked. [2020-10-26 19:24:47,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336602258] [2020-10-26 19:24:47,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:47,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:24:47,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563931237] [2020-10-26 19:24:47,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:24:47,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:47,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:24:47,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:24:47,784 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand 37 states. [2020-10-26 19:24:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:48,499 INFO L93 Difference]: Finished difference Result 357 states and 365 transitions. [2020-10-26 19:24:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:24:48,500 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 192 [2020-10-26 19:24:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:48,502 INFO L225 Difference]: With dead ends: 357 [2020-10-26 19:24:48,502 INFO L226 Difference]: Without dead ends: 202 [2020-10-26 19:24:48,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:24:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-26 19:24:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-10-26 19:24:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-26 19:24:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2020-10-26 19:24:48,516 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 192 [2020-10-26 19:24:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:48,516 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2020-10-26 19:24:48,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:24:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2020-10-26 19:24:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 19:24:48,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:48,517 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 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 19:24:48,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:24:48,518 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash 596294440, now seen corresponding path program 32 times [2020-10-26 19:24:48,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:48,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565591005] [2020-10-26 19:24:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:48,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:48,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:53,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5325 [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:24:53,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:54,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:54,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:54,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:54,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:54,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:54,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:54,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:54,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:54,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:54,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:54,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:54,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-10-26 19:24:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:54,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:54,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:54,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:24:54,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:54,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:54,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:54,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:54,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:24:54,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:54,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2911 backedges. 2 proven. 595 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2020-10-26 19:24:54,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565591005] [2020-10-26 19:24:54,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:54,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:24:54,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844612160] [2020-10-26 19:24:54,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:24:54,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:54,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:24:54,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:24:54,964 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand 38 states. [2020-10-26 19:24:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:55,517 INFO L93 Difference]: Finished difference Result 366 states and 374 transitions. [2020-10-26 19:24:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:24:55,517 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2020-10-26 19:24:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:55,519 INFO L225 Difference]: With dead ends: 366 [2020-10-26 19:24:55,519 INFO L226 Difference]: Without dead ends: 207 [2020-10-26 19:24:55,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:24:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-26 19:24:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-10-26 19:24:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-26 19:24:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2020-10-26 19:24:55,535 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 197 [2020-10-26 19:24:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:55,535 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2020-10-26 19:24:55,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:24:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2020-10-26 19:24:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:24:55,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:55,537 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 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 19:24:55,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:24:55,537 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:55,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1703694346, now seen corresponding path program 33 times [2020-10-26 19:24:55,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:55,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030986192] [2020-10-26 19:24:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:55,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:55,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:01,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5904 [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:25:01,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:02,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:02,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:02,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:02,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:02,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:02,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:02,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:02,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:02,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-10-26 19:25:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:02,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:02,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3084 backedges. 2 proven. 630 refuted. 0 times theorem prover too weak. 2452 trivial. 0 not checked. [2020-10-26 19:25:02,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030986192] [2020-10-26 19:25:02,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:02,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:25:02,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81551101] [2020-10-26 19:25:02,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:25:02,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:25:02,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:25:02,605 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand 39 states. [2020-10-26 19:25:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:03,372 INFO L93 Difference]: Finished difference Result 375 states and 383 transitions. [2020-10-26 19:25:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:25:03,373 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 202 [2020-10-26 19:25:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:03,375 INFO L225 Difference]: With dead ends: 375 [2020-10-26 19:25:03,375 INFO L226 Difference]: Without dead ends: 212 [2020-10-26 19:25:03,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:25:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-26 19:25:03,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2020-10-26 19:25:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-26 19:25:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 213 transitions. [2020-10-26 19:25:03,392 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 213 transitions. Word has length 202 [2020-10-26 19:25:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:03,393 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 213 transitions. [2020-10-26 19:25:03,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:25:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 213 transitions. [2020-10-26 19:25:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-26 19:25:03,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:03,394 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 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 19:25:03,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:25:03,394 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:03,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1215253536, now seen corresponding path program 34 times [2020-10-26 19:25:03,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:03,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513340494] [2020-10-26 19:25:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:03,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:03,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:08,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:25:08,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:09,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:09,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:09,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:09,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:09,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:09,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:09,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:09,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-26 19:25:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:09,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:09,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:09,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:25:09,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:09,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:25:09,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:09,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:25:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3262 backedges. 2 proven. 666 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2020-10-26 19:25:09,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513340494] [2020-10-26 19:25:09,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:09,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:25:09,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323419230] [2020-10-26 19:25:09,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:25:09,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:09,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:25:09,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:25:09,676 INFO L87 Difference]: Start difference. First operand 210 states and 213 transitions. Second operand 40 states. [2020-10-26 19:25:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:10,456 INFO L93 Difference]: Finished difference Result 384 states and 392 transitions. [2020-10-26 19:25:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:25:10,456 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 207 [2020-10-26 19:25:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:10,458 INFO L225 Difference]: With dead ends: 384 [2020-10-26 19:25:10,458 INFO L226 Difference]: Without dead ends: 217 [2020-10-26 19:25:10,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:25:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-26 19:25:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2020-10-26 19:25:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-26 19:25:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2020-10-26 19:25:10,480 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 207 [2020-10-26 19:25:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:10,480 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2020-10-26 19:25:10,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:25:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2020-10-26 19:25:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 19:25:10,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:10,482 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 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 19:25:10,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:25:10,483 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2006589906, now seen corresponding path program 35 times [2020-10-26 19:25:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:10,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895275177] [2020-10-26 19:25:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:10,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:15,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:15,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:25:15,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:15,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5259 [2020-10-26 19:25:15,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:25:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:15,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:25:15,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:16,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:16,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:16,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:16,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:16,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:16,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:25:16,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:16,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:16,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:16,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-10-26 19:25:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:16,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:16,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 2 proven. 703 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2020-10-26 19:25:16,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895275177] [2020-10-26 19:25:16,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:16,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:25:16,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768611296] [2020-10-26 19:25:16,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:25:16,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:25:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:25:16,978 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand 41 states. [2020-10-26 19:25:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:17,575 INFO L93 Difference]: Finished difference Result 393 states and 401 transitions. [2020-10-26 19:25:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:25:17,576 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 212 [2020-10-26 19:25:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:17,578 INFO L225 Difference]: With dead ends: 393 [2020-10-26 19:25:17,578 INFO L226 Difference]: Without dead ends: 222 [2020-10-26 19:25:17,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:25:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-26 19:25:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-10-26 19:25:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-26 19:25:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2020-10-26 19:25:17,595 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 212 [2020-10-26 19:25:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:17,595 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2020-10-26 19:25:17,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:25:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2020-10-26 19:25:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 19:25:17,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:17,597 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 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 19:25:17,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:25:17,597 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1738040472, now seen corresponding path program 36 times [2020-10-26 19:25:17,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:17,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845061824] [2020-10-26 19:25:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:17,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:17,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:22,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:22,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-26 19:25:22,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:25:22,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-26 19:25:22,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:25:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:25:22,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:23,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:23,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:23,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:23,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:23,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-10-26 19:25:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:23,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:23,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:23,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:25:23,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:23,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:25:23,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:23,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:23,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:25:23,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:23,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3633 backedges. 2 proven. 741 refuted. 0 times theorem prover too weak. 2890 trivial. 0 not checked. [2020-10-26 19:25:23,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845061824] [2020-10-26 19:25:23,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:23,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:25:23,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076257976] [2020-10-26 19:25:23,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:25:23,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:25:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:25:23,915 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand 42 states. [2020-10-26 19:25:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:24,772 INFO L93 Difference]: Finished difference Result 402 states and 410 transitions. [2020-10-26 19:25:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:25:24,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 217 [2020-10-26 19:25:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:24,774 INFO L225 Difference]: With dead ends: 402 [2020-10-26 19:25:24,775 INFO L226 Difference]: Without dead ends: 227 [2020-10-26 19:25:24,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:25:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-26 19:25:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2020-10-26 19:25:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-26 19:25:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2020-10-26 19:25:24,791 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 217 [2020-10-26 19:25:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:24,792 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2020-10-26 19:25:24,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:25:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2020-10-26 19:25:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-26 19:25:24,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:24,793 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 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 19:25:24,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:25:24,793 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2100435866, now seen corresponding path program 37 times [2020-10-26 19:25:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:24,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88366452] [2020-10-26 19:25:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat